{ "schema_version": 1, "dataset": "home-energy/gas-vs-electric-water-heater", "title": "Gas vs electric water heater: monthly running cost by state", "page_url": "https://infohelper.net/home-energy/gas-vs-electric-water-heater", "license": "CC BY 4.0", "cite": "Cite the page: https://infohelper.net/home-energy/gas-vs-electric-water-heater", "license_note": "The computed tables are ours, under CC BY 4.0. The underlying EIA and ENERGY STAR data are works of the US government.", "generated_at": "2026-10-13T22:46:33Z", "data_changed_at": "2026-10-13", "content_hash": "sha256:fad4009332de10cbc2f44ec04fba7780e0a977c21b7bda7064288078482060a7", "changes": [ { "date": "2026-10-13", "text": "First published with prices for the 12 months to Jul 2026." } ], "run": { "suspicious": false, "forced": false, "findings": [] }, "sources": [ { "id": "eia-bulk-elec", "publisher": "U.S. Energy Information Administration", "name": "EIA bulk file ELEC: electricity (Forms EIA-861M / EIA-861)", "url": "https://www.eia.gov/opendata/bulk/ELEC.zip", "page_url": "https://www.eia.gov/electricity/data/browser/", "last_updated": "2026-09-23T17:01:12-04:00", "fetched_at": "2026-10-13T22:45:58Z", "used_for": "residential electricity revenue, sales and price by state, monthly" }, { "id": "eia-bulk-ng", "publisher": "U.S. Energy Information Administration", "name": "EIA bulk file NG: natural gas (Forms EIA-857 / EIA-176)", "url": "https://www.eia.gov/opendata/bulk/NG.zip", "page_url": "https://www.eia.gov/dnav/ng/ng_pri_sum_a_EPG0_PRS_DMcf_m.htm", "last_updated": "2026-10-08T15:05:12-04:00", "fetched_at": "2026-10-13T22:46:01Z", "used_for": "residential natural gas price and consumption by state, monthly and annual; heat content; number of residential consumers" }, { "id": "eia-bulk-pet", "publisher": "U.S. Energy Information Administration", "name": "EIA bulk file PET: petroleum (weekly heating oil and propane prices)", "url": "https://www.eia.gov/opendata/bulk/PET.zip", "page_url": "https://www.eia.gov/petroleum/heatingoilpropane/", "last_updated": "2026-10-07T17:59:25-04:00", "fetched_at": "2026-10-13T22:46:02Z", "used_for": "residential propane and heating oil price by state, weekly, October–March" }, { "id": "energy-star-pbpq-swnu", "publisher": "ENERGY STAR (U.S. EPA)", "name": "ENERGY STAR Certified Water Heaters", "url": "https://data.energystar.gov/d/pbpq-swnu", "page_url": "https://data.energystar.gov/d/pbpq-swnu", "last_updated": "2026-10-13", "fetched_at": "2026-10-13T22:46:43Z", "used_for": "efficiency of the certified models" } ], "formula_version": "water-heater/1", "prices_formula_version": "home-energy-prices/1", "period": { "label": "12 months to Jul 2026", "electricity": { "start": "2025-08", "end": "2026-07", "label": "12 months to Jul 2026" }, "gas": { "start": "2025-08", "end": "2026-07", "label": "12 months to Jul 2026" }, "gas_regression": { "start": "2023-08", "end": "2026-07", "label": "36 months to Jul 2026" }, "winter": { "start": "2025-11", "end": "2026-03", "label": "Nov 2025–Mar 2026" }, "heating_season": { "start": "2025-10", "end": "2026-03", "label": "Oct 2025–Mar 2026" } }, "assumptions": { "main_household": "medium", "gas_views": { "eia_average": "The published EIA average gas price. Drives the first screen, the count line and \"cheapest\".", "estimated": "The estimated per-therm rate (the fixed charge taken out), for the second count sentence. Where the estimate does not hold (gas_price_basis = eia_average_fallback) the EIA average is used." }, "basic_models": "The gas tank and the electric tank are \"the basic model\": the federal minimum efficiency for a 40-gallon gas tank and a 50-gallon electric tank. ENERGY STAR lists neither machine.", "other_draws": "Low and high use apply the federal minimum of that draw pattern to the same tank: a model, not a rating (a given tank is certified at one pattern).", "tankless_electricity": "The electricity a gas tankless heater uses (ignition, fan, freeze protection) is not in open data and is not counted.", "propane": "Propane heaters are priced with the same efficiency as the natural gas machine and 91,452 Btu per gallon; an assumption." }, "methods": { "energy_per_year": "Heat delivered Q = 365 × gallons a day × 8.24 lb/gal × 1.00 Btu/(lb·°F) × 67 °F. Gas: therms = Q ÷ UEF ÷ 100,000. Electric tank: kWh = Q ÷ UEF ÷ 3,412. Heat pump: the median electric_usage_kwh_yr of the ENERGY STAR certified models rated at that draw pattern.", "cost": "cost per year = therms × gas $/therm or kWh × electricity $/kWh, from the prices in the same row; per month = per year ÷ 12 (so 12 × the monthly figure can differ from the yearly one by a few cents of rounding).", "us": "The US figures use the US row of state-prices.json (EIA national series), not a mean of the states." }, "machines": { "gas_tank": { "label": "Gas tank, the basic model", "basis": "federal_minimum", "selection": "Federal minimum UEF for a gas-fired storage heater of 20–55 gallons made before 2029-05-06, at 40 gallons", "gallons": 40.0, "uef_by_draw": { "low": 0.5222, "medium": 0.5803, "high": 0.64 }, "status": "assumed" }, "gas_tankless": { "label": "Gas tankless, ENERGY STAR certified", "basis": "energy_star_median", "selection": "type = \"Gas Tankless\"; median uniform_energy_factor_uef, used at every draw pattern", "uef": 0.95, "uef_min": 0.95, "uef_max": 0.98, "models": 460, "status": "verified" }, "electric_tank": { "label": "Electric tank, the basic model", "basis": "federal_minimum", "selection": "Federal minimum UEF for an electric storage heater of 20–55 gallons made before 2029-05-06, at 50 gallons", "gallons": 50.0, "uef_by_draw": { "low": 0.9104, "medium": 0.9207, "high": 0.9299 }, "status": "assumed" }, "heat_pump": { "label": "Heat pump water heater, ENERGY STAR certified", "basis": "energy_star_median", "selection": "type = \"Hybrid/Electric Heat Pump\"; median electric_usage_kwh_yr of the models rated at the draw pattern", "by_draw": { "low": { "kwh_per_year": 780.0, "kwh_per_year_min": 643.0, "kwh_per_year_max": 893.0, "uef": 2.8, "models": 16 }, "medium": { "kwh_per_year": 902.0, "kwh_per_year_min": 769.0, "kwh_per_year_max": 1550.0, "uef": 3.52, "models": 268 }, "high": { "kwh_per_year": 1279.0, "kwh_per_year_min": 900.0, "kwh_per_year_max": 1741.0, "uef": 3.8, "models": 314 } }, "status": "verified" } }, "beyond_cost": { "first_hour_rating_gallons": { "certified_gas_tank": { "median": 95.0, "min": 86.0, "max": 118.0, "models": 71 }, "heat_pump": { "median": 75.0, "min": 45.0, "max": 134.0, "models": 599 } }, "heat_pump_sound_dba": { "median": 49.0, "min": 37.0, "max": 54.0, "models": 156 }, "heat_pump_models": { "models": 599, "volts_120": 76 } }, "household": { "low": { "gallons_per_day": 38.0, "heat_delivered_btu_per_year": 7657350.0, "heat_delivered_kwh_per_year": 2244.2, "energy_per_year": { "gas_tank_therms": 146.64, "gas_tankless_therms": 80.6, "electric_tank_kwh": 2465.1, "heat_pump_kwh": 780.0, "propane_tank_gallons": 160.3, "propane_tankless_gallons": 88.1 }, "check_heat_pump_kwh_times_uef": 2184.0 }, "medium": { "gallons_per_day": 55.0, "heat_delivered_btu_per_year": 11083006.0, "heat_delivered_kwh_per_year": 3248.2, "energy_per_year": { "gas_tank_therms": 190.99, "gas_tankless_therms": 116.66, "electric_tank_kwh": 3528.0, "heat_pump_kwh": 902.0, "propane_tank_gallons": 208.8, "propane_tankless_gallons": 127.6 }, "check_heat_pump_kwh_times_uef": 3175.0 }, "high": { "gallons_per_day": 84.0, "heat_delivered_btu_per_year": 16926773.0, "heat_delivered_kwh_per_year": 4961.0, "energy_per_year": { "gas_tank_therms": 264.48, "gas_tankless_therms": 178.18, "electric_tank_kwh": 5334.9, "heat_pump_kwh": 1279.0, "propane_tank_gallons": 289.2, "propane_tankless_gallons": 194.8 }, "check_heat_pump_kwh_times_uef": 4860.2 } }, "energy_star": { "dataset": "pbpq-swnu", "name": "ENERGY STAR Certified Water Heaters", "rows": 1256, "rows_updated_at": "2026-10-13", "fetched_at": "2026-10-13T22:46:43Z", "from_cache": false }, "rule_2029": { "applies_from": "2029-05-06", "electric_tank_uef_min": 2.3, "gas_tank_uef_min_medium": 0.6366, "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(2), electric storage 20–55 gal made on or after 2029-05-06, small electric storage excluded", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13" }, "constants": [ { "key": "btu_per_kwh", "value": 3412.0, "unit": "Btu/kWh", "source": "10 CFR 430 Subpart B Appendix D2, eCFR as of 2026-09-01, section 4.4", "source_url": "https://www.ecfr.gov/api/versioner/v1/full/2026-09-01/title-10.xml?part=430&appendix=Appendix%20D2%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "btu_per_therm", "value": 100000.0, "unit": "Btu/therm", "source": "EIA, Units and calculators", "source_url": "https://www.eia.gov/energyexplained/units-and-calculators/", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "btu_per_gallon_propane", "value": 91452.0, "unit": "Btu/gal", "source": "EIA, Units and calculators", "source_url": "https://www.eia.gov/energyexplained/units-and-calculators/", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gallons_per_day_low", "value": 38.0, "unit": "gal/day", "source": "10 CFR 430 Subpart B Appendix E, section 6.3.9, eCFR as of 2026-10-08", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-B/appendix-Appendix%20E%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gallons_per_day_medium", "value": 55.0, "unit": "gal/day", "source": "10 CFR 430 Subpart B Appendix E, section 6.3.9, eCFR as of 2026-10-08", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-B/appendix-Appendix%20E%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gallons_per_day_high", "value": 84.0, "unit": "gal/day", "source": "10 CFR 430 Subpart B Appendix E, section 6.3.9, eCFR as of 2026-10-08", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-B/appendix-Appendix%20E%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.water_density_lb_per_gallon", "value": 8.24, "unit": "lb/gal", "source": "10 CFR 430 Subpart B Appendix E, section 6.3.9, eCFR as of 2026-10-08", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-B/appendix-Appendix%20E%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.water_specific_heat", "value": 1.0, "unit": "Btu/(lb·°F)", "source": "10 CFR 430 Subpart B Appendix E, section 6.3.9, eCFR as of 2026-10-08", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-B/appendix-Appendix%20E%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.temperature_rise_f", "value": 67.0, "unit": "°F", "source": "10 CFR 430 Subpart B Appendix E, section 6.3.9, eCFR as of 2026-10-08 (125 °F out, 58 °F in)", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-B/appendix-Appendix%20E%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "One inlet temperature for every state; real incoming water is colder in the north." }, { "key": "wh.days_per_year", "value": 365.0, "unit": "days", "source": "10 CFR 430 Subpart B Appendix E, section 6.3.9, eCFR as of 2026-10-08", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-B/appendix-Appendix%20E%20to%20Subpart%20B%20of%20Part%20430", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gas_tank_gallons", "value": 40.0, "unit": "gal", "source": "Model choice: the common 40-gallon gas tank", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "assumed", "note": "\"The basic model is the federal minimum\" is an assumption about what is on the shelf; DOE certification data (CCMS, read 2026-10-13) gives a median UEF of 0.60 for 474 gas tanks of 36–45 gallons at medium use, against the minimum 0.58." }, { "key": "wh.electric_tank_gallons", "value": 50.0, "unit": "gal", "source": "Model choice: the common 50-gallon electric tank", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "assumed", "note": "CCMS median UEF 0.93 for 325 electric tanks of 46–55 gallons at medium use, against the minimum 0.92." }, { "key": "wh.gas_tank_uef_min_intercept_low", "value": 0.5982, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), gas-fired storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gas_tank_uef_min_slope_low", "value": 0.0019, "unit": "UEF/gal", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), gas-fired storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gas_tank_uef_min_intercept_medium", "value": 0.6483, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), gas-fired storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gas_tank_uef_min_slope_medium", "value": 0.0017, "unit": "UEF/gal", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), gas-fired storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gas_tank_uef_min_intercept_high", "value": 0.692, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), gas-fired storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gas_tank_uef_min_slope_high", "value": 0.0013, "unit": "UEF/gal", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), gas-fired storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.electric_tank_uef_min_intercept_low", "value": 0.9254, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), electric storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.electric_tank_uef_min_slope_low", "value": 0.0003, "unit": "UEF/gal", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), electric storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.electric_tank_uef_min_intercept_medium", "value": 0.9307, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), electric storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.electric_tank_uef_min_slope_medium", "value": 0.0002, "unit": "UEF/gal", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), electric storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.electric_tank_uef_min_intercept_high", "value": 0.9349, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), electric storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.electric_tank_uef_min_slope_high", "value": 0.0001, "unit": "UEF/gal", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), electric storage 20–55 gal, made before 2029-05-06", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "" }, { "key": "wh.gas_tankless_uef_min", "value": 0.81, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(1), gas-fired instantaneous", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "Not used by the gas vs electric page (it shows the certified median); kept for the tankless page." }, { "key": "wh.electric_tank_uef_min_from_2029", "value": 2.3, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(2), electric storage 20–55 gal made on or after 2029-05-06, small electric storage excluded", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "In the eCFR as of 2026-10-08; a rule can be amended before it applies." }, { "key": "wh.gas_tank_uef_min_intercept_medium_from_2029", "value": 0.7046, "unit": "UEF", "source": "10 CFR 430.32, eCFR as of 2026-10-08 (d)(2), gas-fired storage 20–55 gal made on or after 2029-05-06, medium use", "source_url": "https://www.ecfr.gov/current/title-10/chapter-II/subchapter-D/part-430/subpart-C/section-430.32", "checked_on": "2026-10-13", "status": "verified", "note": "Slope 0.0017 per gallon of effective volume." } ], "unverified": [ { "what": "wh.gas_tank_gallons", "status": "assumed", "note": "\"The basic model is the federal minimum\" is an assumption about what is on the shelf; DOE certification data (CCMS, read 2026-10-13) gives a median UEF of 0.60 for 474 gas tanks of 36–45 gallons at medium use, against the minimum 0.58." }, { "what": "wh.electric_tank_gallons", "status": "assumed", "note": "CCMS median UEF 0.93 for 325 electric tanks of 46–55 gallons at medium use, against the minimum 0.92." }, { "what": "low and high use for the tanks", "status": "assumed", "note": "The federal minimum of another draw pattern applied to the same tank is a model, not a rating." }, { "what": "propane heaters", "status": "assumed", "note": "Same efficiency as the natural gas machine; not checked against propane-rated models." }, { "what": "gas_estimated_usd_per_therm", "status": "estimate", "note": "A regression estimate; second view only." } ], "not_included": { "recs_water_heating_fuel_share": "The share of homes heating water with electricity or gas (EIA RECS 2020) is not in this file yet.", "recs_sanity_check": "The comparison of the medium-use gas figure with RECS average consumption is not built yet." }, "us": { "code": "US", "name": "United States", "slug": "united-states", "electricity_cents_per_kwh": 17.99, "gas_usd_per_therm": 1.5754, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.1242, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.5754, "cost_per_month_usd": { "gas_tank": 25.07, "gas_tankless": 15.32, "electric_tank": 52.89, "heat_pump": 13.52 }, "cost_per_year_usd": { "gas_tank": 300.89, "gas_tankless": 183.79, "electric_tank": 634.69, "heat_pump": 162.27 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 13.3, "electric_tank_over_gas_tank_per_year_usd": 333.8, "gas_tank_over_heat_pump_per_year_usd": 138.62, "gas_price_basis": "eia_average" }, "estimated": { "gas_usd_per_therm": 1.1242, "cost_per_month_usd": { "gas_tank": 17.89, "gas_tankless": 10.93, "electric_tank": 52.89, "heat_pump": 13.52 }, "cost_per_year_usd": { "gas_tank": 214.71, "gas_tankless": 131.15, "electric_tank": 634.69, "heat_pump": 162.27 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 23.7, "electric_tank_over_gas_tank_per_year_usd": 419.98, "gas_tank_over_heat_pump_per_year_usd": 52.44, "gas_price_basis": "estimated_per_therm" }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 19.25, "gas_tankless": 10.58, "electric_tank": 36.96, "heat_pump": 11.69 }, "cost_per_year_usd": { "gas_tank": 231.02, "gas_tankless": 126.98, "electric_tank": 443.47, "heat_pump": 140.32 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 25.07, "gas_tankless": 15.32, "electric_tank": 52.89, "heat_pump": 13.52 }, "cost_per_year_usd": { "gas_tank": 300.89, "gas_tankless": 183.79, "electric_tank": 634.69, "heat_pump": 162.27 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 34.72, "gas_tankless": 23.39, "electric_tank": 79.98, "heat_pump": 19.17 }, "cost_per_year_usd": { "gas_tank": 416.66, "gas_tankless": 280.7, "electric_tank": 959.75, "heat_pump": 230.09 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 2.553, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 44.42, "propane_tankless": 27.15, "electric_tank": 52.89, "heat_pump": 13.52 }, "cost_per_year_usd": { "propane_tank": 533.07, "propane_tankless": 325.76, "electric_tank": 634.69, "heat_pump": 162.27 }, "cheapest": "heat_pump", "status": "assumed" } }, "states": { "AL": { "code": "AL", "name": "Alabama", "slug": "alabama", "electricity_cents_per_kwh": 16.44, "gas_usd_per_therm": 1.7851, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.5207, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.7851, "cost_per_month_usd": { "gas_tank": 28.41, "gas_tankless": 17.35, "electric_tank": 48.33, "heat_pump": 12.36 }, "cost_per_year_usd": { "gas_tank": 340.94, "gas_tankless": 208.25, "electric_tank": 580.0, "heat_pump": 148.29 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 40.4, "electric_tank_over_gas_tank_per_year_usd": 239.07, "gas_tank_over_heat_pump_per_year_usd": 192.65, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 36 }, "estimated": { "gas_usd_per_therm": 1.5207, "cost_per_month_usd": { "gas_tank": 24.2, "gas_tankless": 14.78, "electric_tank": 48.33, "heat_pump": 12.36 }, "cost_per_year_usd": { "gas_tank": 290.44, "gas_tankless": 177.4, "electric_tank": 580.0, "heat_pump": 148.29 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 19.6, "electric_tank_over_gas_tank_per_year_usd": 289.56, "gas_tank_over_heat_pump_per_year_usd": 142.15, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 41 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 21.81, "gas_tankless": 11.99, "electric_tank": 33.77, "heat_pump": 10.69 }, "cost_per_year_usd": { "gas_tank": 261.77, "gas_tankless": 143.88, "electric_tank": 405.26, "heat_pump": 128.23 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 28.41, "gas_tankless": 17.35, "electric_tank": 48.33, "heat_pump": 12.36 }, "cost_per_year_usd": { "gas_tank": 340.94, "gas_tankless": 208.25, "electric_tank": 580.0, "heat_pump": 148.29 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 39.34, "gas_tankless": 26.51, "electric_tank": 73.09, "heat_pump": 17.52 }, "cost_per_year_usd": { "gas_tank": 472.12, "gas_tankless": 318.07, "electric_tank": 877.06, "heat_pump": 210.27 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 3.462, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 60.24, "propane_tankless": 36.81, "electric_tank": 48.33, "heat_pump": 12.36 }, "cost_per_year_usd": { "propane_tank": 722.87, "propane_tankless": 441.75, "electric_tank": 580.0, "heat_pump": 148.29 }, "cheapest": "heat_pump", "status": "assumed" } }, "AK": { "code": "AK", "name": "Alaska", "slug": "alaska", "electricity_cents_per_kwh": 26.85, "gas_usd_per_therm": 1.3759, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.0753, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.3759, "cost_per_month_usd": { "gas_tank": 21.9, "gas_tankless": 13.38, "electric_tank": 78.94, "heat_pump": 20.18 }, "cost_per_year_usd": { "gas_tank": 262.78, "gas_tankless": 160.51, "electric_tank": 947.27, "heat_pump": 242.19 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 50.9, "electric_tank_over_gas_tank_per_year_usd": 684.48, "gas_tank_over_heat_pump_per_year_usd": 20.6, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 3 }, "estimated": { "gas_usd_per_therm": 1.0753, "cost_per_month_usd": { "gas_tank": 17.11, "gas_tankless": 10.45, "electric_tank": 78.94, "heat_pump": 20.18 }, "cost_per_year_usd": { "gas_tank": 205.37, "gas_tankless": 125.44, "electric_tank": 947.27, "heat_pump": 242.19 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 63.7, "electric_tank_over_gas_tank_per_year_usd": 741.9, "gas_tank_over_heat_pump_per_year_usd": -36.82, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 3 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 16.81, "gas_tankless": 9.24, "electric_tank": 55.16, "heat_pump": 17.45 }, "cost_per_year_usd": { "gas_tank": 201.76, "gas_tankless": 110.9, "electric_tank": 661.88, "heat_pump": 209.43 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 21.9, "gas_tankless": 13.38, "electric_tank": 78.94, "heat_pump": 20.18 }, "cost_per_year_usd": { "gas_tank": 262.78, "gas_tankless": 160.51, "electric_tank": 947.27, "heat_pump": 242.19 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 30.32, "gas_tankless": 20.43, "electric_tank": 119.37, "heat_pump": 28.62 }, "cost_per_year_usd": { "gas_tank": 363.9, "gas_tankless": 245.16, "electric_tank": 1432.42, "heat_pump": 343.41 }, "cheapest": "gas_tankless" } }, "propane": null }, "AZ": { "code": "AZ", "name": "Arizona", "slug": "arizona", "electricity_cents_per_kwh": 15.4, "gas_usd_per_therm": 1.9765, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.4409, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.9765, "cost_per_month_usd": { "gas_tank": 31.46, "gas_tankless": 19.21, "electric_tank": 45.28, "heat_pump": 11.58 }, "cost_per_year_usd": { "gas_tank": 377.49, "gas_tankless": 230.58, "electric_tank": 543.31, "heat_pump": 138.91 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 66.0, "electric_tank_over_gas_tank_per_year_usd": 165.82, "gas_tank_over_heat_pump_per_year_usd": 238.58, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 46 }, "estimated": { "gas_usd_per_therm": 1.4409, "cost_per_month_usd": { "gas_tank": 22.93, "gas_tankless": 14.01, "electric_tank": 45.28, "heat_pump": 11.58 }, "cost_per_year_usd": { "gas_tank": 275.2, "gas_tankless": 168.1, "electric_tank": 543.31, "heat_pump": 138.91 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 21.0, "electric_tank_over_gas_tank_per_year_usd": 268.11, "gas_tank_over_heat_pump_per_year_usd": 136.29, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 44 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 24.15, "gas_tankless": 13.28, "electric_tank": 31.64, "heat_pump": 10.01 }, "cost_per_year_usd": { "gas_tank": 289.83, "gas_tankless": 159.31, "electric_tank": 379.63, "heat_pump": 120.12 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 31.46, "gas_tankless": 19.21, "electric_tank": 45.28, "heat_pump": 11.58 }, "cost_per_year_usd": { "gas_tank": 377.49, "gas_tankless": 230.58, "electric_tank": 543.31, "heat_pump": 138.91 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 43.56, "gas_tankless": 29.35, "electric_tank": 68.46, "heat_pump": 16.41 }, "cost_per_year_usd": { "gas_tank": 522.74, "gas_tankless": 352.17, "electric_tank": 821.57, "heat_pump": 196.97 }, "cheapest": "heat_pump" } }, "propane": null }, "AR": { "code": "AR", "name": "Arkansas", "slug": "arkansas", "electricity_cents_per_kwh": 13.43, "gas_usd_per_therm": 2.2084, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": null, "gas_estimated_reason": "poor_fit", "eia_average": { "gas_usd_per_therm": 2.2084, "cost_per_month_usd": { "gas_tank": 35.15, "gas_tankless": 21.47, "electric_tank": 39.48, "heat_pump": 10.09 }, "cost_per_year_usd": { "gas_tank": 421.78, "gas_tankless": 257.63, "electric_tank": 473.81, "heat_pump": 121.14 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 112.7, "electric_tank_over_gas_tank_per_year_usd": 52.03, "gas_tank_over_heat_pump_per_year_usd": 300.64, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 51 }, "estimated": { "gas_usd_per_therm": 2.2084, "cost_per_month_usd": { "gas_tank": 35.15, "gas_tankless": 21.47, "electric_tank": 39.48, "heat_pump": 10.09 }, "cost_per_year_usd": { "gas_tank": 421.78, "gas_tankless": 257.63, "electric_tank": 473.81, "heat_pump": 121.14 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 112.7, "electric_tank_over_gas_tank_per_year_usd": 52.03, "gas_tank_over_heat_pump_per_year_usd": 300.64, "gas_price_basis": "eia_average_fallback", "electric_tank_over_gas_tank_rank": 51 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 26.99, "gas_tankless": 14.83, "electric_tank": 27.59, "heat_pump": 8.73 }, "cost_per_year_usd": { "gas_tank": 323.84, "gas_tankless": 178.0, "electric_tank": 331.06, "heat_pump": 104.75 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 35.15, "gas_tankless": 21.47, "electric_tank": 39.48, "heat_pump": 10.09 }, "cost_per_year_usd": { "gas_tank": 421.78, "gas_tankless": 257.63, "electric_tank": 473.81, "heat_pump": 121.14 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 48.67, "gas_tankless": 32.79, "electric_tank": 59.71, "heat_pump": 14.31 }, "cost_per_year_usd": { "gas_tank": 584.08, "gas_tankless": 393.49, "electric_tank": 716.48, "heat_pump": 171.77 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 2.342, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 40.75, "propane_tankless": 24.9, "electric_tank": 39.48, "heat_pump": 10.09 }, "cost_per_year_usd": { "propane_tank": 489.01, "propane_tankless": 298.84, "electric_tank": 473.81, "heat_pump": 121.14 }, "cheapest": "heat_pump", "status": "assumed" } }, "CA": { "code": "CA", "name": "California", "slug": "california", "electricity_cents_per_kwh": 32.99, "gas_usd_per_therm": 2.1536, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2025", "gas_estimated_usd_per_therm": null, "gas_estimated_reason": "poor_fit", "eia_average": { "gas_usd_per_therm": 2.1536, "cost_per_month_usd": { "gas_tank": 34.28, "gas_tankless": 20.94, "electric_tank": 96.99, "heat_pump": 24.8 }, "cost_per_year_usd": { "gas_tank": 411.32, "gas_tankless": 251.24, "electric_tank": 1163.89, "heat_pump": 297.57 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 18.4, "electric_tank_over_gas_tank_per_year_usd": 752.57, "gas_tank_over_heat_pump_per_year_usd": 113.75, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 1 }, "estimated": { "gas_usd_per_therm": 2.1536, "cost_per_month_usd": { "gas_tank": 34.28, "gas_tankless": 20.94, "electric_tank": 96.99, "heat_pump": 24.8 }, "cost_per_year_usd": { "gas_tank": 411.32, "gas_tankless": 251.24, "electric_tank": 1163.89, "heat_pump": 297.57 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 18.4, "electric_tank_over_gas_tank_per_year_usd": 752.57, "gas_tank_over_heat_pump_per_year_usd": 113.75, "gas_price_basis": "eia_average_fallback", "electric_tank_over_gas_tank_rank": 2 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 26.32, "gas_tankless": 14.47, "electric_tank": 67.77, "heat_pump": 21.44 }, "cost_per_year_usd": { "gas_tank": 315.8, "gas_tankless": 173.58, "electric_tank": 813.24, "heat_pump": 257.32 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 34.28, "gas_tankless": 20.94, "electric_tank": 96.99, "heat_pump": 24.8 }, "cost_per_year_usd": { "gas_tank": 411.32, "gas_tankless": 251.24, "electric_tank": 1163.89, "heat_pump": 297.57 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 47.47, "gas_tankless": 31.98, "electric_tank": 146.67, "heat_pump": 35.16 }, "cost_per_year_usd": { "gas_tank": 569.58, "gas_tankless": 383.73, "electric_tank": 1759.98, "heat_pump": 421.94 }, "cheapest": "gas_tankless" } }, "propane": null }, "CO": { "code": "CO", "name": "Colorado", "slug": "colorado", "electricity_cents_per_kwh": 16.55, "gas_usd_per_therm": 1.0868, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.8583, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.0868, "cost_per_month_usd": { "gas_tank": 17.3, "gas_tankless": 10.57, "electric_tank": 48.66, "heat_pump": 12.44 }, "cost_per_year_usd": { "gas_tank": 207.57, "gas_tankless": 126.79, "electric_tank": 583.88, "heat_pump": 149.28 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 17.7, "electric_tank_over_gas_tank_per_year_usd": 376.32, "gas_tank_over_heat_pump_per_year_usd": 58.29, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 20 }, "estimated": { "gas_usd_per_therm": 0.8583, "cost_per_month_usd": { "gas_tank": 13.66, "gas_tankless": 8.34, "electric_tank": 48.66, "heat_pump": 12.44 }, "cost_per_year_usd": { "gas_tank": 163.93, "gas_tankless": 100.13, "electric_tank": 583.88, "heat_pump": 149.28 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 49.1, "electric_tank_over_gas_tank_per_year_usd": 419.96, "gas_tank_over_heat_pump_per_year_usd": 14.65, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 20 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 13.28, "gas_tankless": 7.3, "electric_tank": 34.0, "heat_pump": 10.76 }, "cost_per_year_usd": { "gas_tank": 159.37, "gas_tankless": 87.6, "electric_tank": 407.97, "heat_pump": 129.09 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 17.3, "gas_tankless": 10.57, "electric_tank": 48.66, "heat_pump": 12.44 }, "cost_per_year_usd": { "gas_tank": 207.57, "gas_tankless": 126.79, "electric_tank": 583.88, "heat_pump": 149.28 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 23.95, "gas_tankless": 16.14, "electric_tank": 73.58, "heat_pump": 17.64 }, "cost_per_year_usd": { "gas_tank": 287.44, "gas_tankless": 193.65, "electric_tank": 882.93, "heat_pump": 211.67 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 2.223, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 38.68, "propane_tankless": 23.64, "electric_tank": 48.66, "heat_pump": 12.44 }, "cost_per_year_usd": { "propane_tank": 464.16, "propane_tankless": 283.65, "electric_tank": 583.88, "heat_pump": 149.28 }, "cheapest": "heat_pump", "status": "assumed" } }, "CT": { "code": "CT", "name": "Connecticut", "slug": "connecticut", "electricity_cents_per_kwh": 27.99, "gas_usd_per_therm": 1.634, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2024", "gas_estimated_usd_per_therm": 1.4183, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.634, "cost_per_month_usd": { "gas_tank": 26.01, "gas_tankless": 15.89, "electric_tank": 82.29, "heat_pump": 21.04 }, "cost_per_year_usd": { "gas_tank": 312.08, "gas_tankless": 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"cheapest": "heat_pump", "status": "assumed" } }, "DE": { "code": "DE", "name": "Delaware", "slug": "delaware", "electricity_cents_per_kwh": 17.79, "gas_usd_per_therm": 1.7779, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.2363, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.7779, "cost_per_month_usd": { "gas_tank": 28.3, "gas_tankless": 17.28, "electric_tank": 52.3, "heat_pump": 13.37 }, "cost_per_year_usd": { "gas_tank": 339.56, "gas_tankless": 207.41, "electric_tank": 627.63, "heat_pump": 160.47 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 29.3, "electric_tank_over_gas_tank_per_year_usd": 288.07, "gas_tank_over_heat_pump_per_year_usd": 179.1, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 28 }, "estimated": { "gas_usd_per_therm": 1.2363, "cost_per_month_usd": { "gas_tank": 19.68, "gas_tankless": 12.02, "electric_tank": 52.3, "heat_pump": 13.37 }, 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71.15, "heat_pump": 18.19 }, "cost_per_year_usd": { "gas_tank": 326.8, "gas_tankless": 199.62, "electric_tank": 853.78, "heat_pump": 218.28 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 9.4, "electric_tank_over_gas_tank_per_year_usd": 526.97, "gas_tank_over_heat_pump_per_year_usd": 108.52, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 11 }, "estimated": { "gas_usd_per_therm": 1.3315, "cost_per_month_usd": { "gas_tank": 21.19, "gas_tankless": 12.94, "electric_tank": 71.15, "heat_pump": 18.19 }, "cost_per_year_usd": { "gas_tank": 254.3, "gas_tankless": 155.33, "electric_tank": 853.78, "heat_pump": 218.28 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 40.5, "electric_tank_over_gas_tank_per_year_usd": 599.47, "gas_tank_over_heat_pump_per_year_usd": 36.02, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 8 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 20.91, "gas_tankless": 11.49, "electric_tank": 49.71, "heat_pump": 15.73 }, "cost_per_year_usd": { "gas_tank": 250.92, "gas_tankless": 137.91, "electric_tank": 596.55, "heat_pump": 188.76 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 27.23, "gas_tankless": 16.63, "electric_tank": 71.15, "heat_pump": 18.19 }, "cost_per_year_usd": { "gas_tank": 326.8, "gas_tankless": 199.62, "electric_tank": 853.78, "heat_pump": 218.28 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 37.71, "gas_tankless": 25.41, "electric_tank": 107.59, "heat_pump": 25.79 }, "cost_per_year_usd": { "gas_tank": 452.55, "gas_tankless": 304.88, "electric_tank": 1291.05, "heat_pump": 309.52 }, "cheapest": "gas_tankless" } }, "propane": null }, "FL": { "code": "FL", "name": "Florida", "slug": "florida", "electricity_cents_per_kwh": 15.39, "gas_usd_per_therm": 2.4883, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2025", "gas_estimated_usd_per_therm": 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"cost_per_month_usd": { "propane_tank": 81.21, "propane_tankless": 49.63, "electric_tank": 45.25, "heat_pump": 11.57 }, "cost_per_year_usd": { "propane_tank": 974.47, "propane_tankless": 595.51, "electric_tank": 542.96, "heat_pump": 138.82 }, "cheapest": "heat_pump", "status": "assumed" } }, "GA": { "code": "GA", "name": "Georgia", "slug": "georgia", "electricity_cents_per_kwh": 15.12, "gas_usd_per_therm": 2.1416, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.6936, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 2.1416, "cost_per_month_usd": { "gas_tank": 34.09, "gas_tankless": 20.82, "electric_tank": 44.45, "heat_pump": 11.37 }, "cost_per_year_usd": { "gas_tank": 409.02, "gas_tankless": 249.84, "electric_tank": 533.43, "heat_pump": 136.38 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 83.2, "electric_tank_over_gas_tank_per_year_usd": 124.41, 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"cost_per_year_usd": { "gas_tank": 203.81, "gas_tankless": 137.31, "electric_tank": 674.86, "heat_pump": 161.79 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 2.363, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 41.12, "propane_tankless": 25.13, "electric_tank": 37.19, "heat_pump": 9.51 }, "cost_per_year_usd": { "propane_tank": 493.39, "propane_tankless": 301.52, "electric_tank": 446.29, "heat_pump": 114.1 }, "cheapest": "heat_pump", "status": "assumed" } }, "IL": { "code": "IL", "name": "Illinois", "slug": "illinois", "electricity_cents_per_kwh": 18.79, "gas_usd_per_therm": 1.136, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.7849, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.136, "cost_per_month_usd": { "gas_tank": 18.08, "gas_tankless": 11.04, "electric_tank": 55.24, "heat_pump": 14.12 }, "cost_per_year_usd": { "gas_tank": 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"cost_per_year_usd": { "gas_tank": 166.58, "gas_tankless": 91.56, "electric_tank": 463.19, "heat_pump": 146.56 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 18.08, "gas_tankless": 11.04, "electric_tank": 55.24, "heat_pump": 14.12 }, "cost_per_year_usd": { "gas_tank": 216.96, "gas_tankless": 132.53, "electric_tank": 662.91, "heat_pump": 169.49 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 25.04, "gas_tankless": 16.87, "electric_tank": 83.54, "heat_pump": 20.03 }, "cost_per_year_usd": { "gas_tank": 300.45, "gas_tankless": 202.41, "electric_tank": 1002.43, "heat_pump": 240.32 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 1.905, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 33.15, "propane_tankless": 20.26, "electric_tank": 55.24, "heat_pump": 14.12 }, "cost_per_year_usd": { "propane_tank": 397.76, "propane_tankless": 243.08, "electric_tank": 662.91, "heat_pump": 169.49 }, "cheapest": "heat_pump", "status": "assumed" } }, "IN": { "code": "IN", "name": "Indiana", "slug": "indiana", "electricity_cents_per_kwh": 16.94, "gas_usd_per_therm": 1.1543, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.7356, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.1543, "cost_per_month_usd": { "gas_tank": 18.37, "gas_tankless": 11.22, "electric_tank": 49.8, "heat_pump": 12.73 }, "cost_per_year_usd": { "gas_tank": 220.46, "gas_tankless": 134.66, "electric_tank": 597.64, "heat_pump": 152.8 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 13.5, "electric_tank_over_gas_tank_per_year_usd": 377.18, "gas_tank_over_heat_pump_per_year_usd": 67.66, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 19 }, "estimated": { "gas_usd_per_therm": 0.7356, "cost_per_month_usd": { "gas_tank": 11.71, "gas_tankless": 7.15, "electric_tank": 49.8, "heat_pump": 12.73 }, "cost_per_year_usd": { "gas_tank": 140.49, "gas_tankless": 85.82, "electric_tank": 597.64, "heat_pump": 152.8 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 63.7, "electric_tank_over_gas_tank_per_year_usd": 457.15, "gas_tank_over_heat_pump_per_year_usd": -12.31, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 18 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 14.11, "gas_tankless": 7.75, "electric_tank": 34.8, "heat_pump": 11.01 }, "cost_per_year_usd": { "gas_tank": 169.27, "gas_tankless": 93.04, "electric_tank": 417.59, "heat_pump": 132.13 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 18.37, "gas_tankless": 11.22, "electric_tank": 49.8, "heat_pump": 12.73 }, "cost_per_year_usd": { "gas_tank": 220.46, "gas_tankless": 134.66, "electric_tank": 597.64, "heat_pump": 152.8 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 25.44, "gas_tankless": 17.14, "electric_tank": 75.31, "heat_pump": 18.06 }, "cost_per_year_usd": { "gas_tank": 305.29, "gas_tankless": 205.67, "electric_tank": 903.73, "heat_pump": 216.66 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 2.473, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 43.03, "propane_tankless": 26.3, "electric_tank": 49.8, "heat_pump": 12.73 }, "cost_per_year_usd": { "propane_tank": 516.36, "propane_tankless": 315.55, "electric_tank": 597.64, "heat_pump": 152.8 }, "cheapest": "heat_pump", "status": "assumed" } }, "IA": { "code": "IA", "name": "Iowa", "slug": "iowa", "electricity_cents_per_kwh": 14.13, "gas_usd_per_therm": 1.0949, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.7447, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.0949, "cost_per_month_usd": { "gas_tank": 17.43, "gas_tankless": 10.64, "electric_tank": 41.54, "heat_pump": 10.62 }, "cost_per_year_usd": { "gas_tank": 209.11, "gas_tankless": 127.73, "electric_tank": 498.51, "heat_pump": 127.45 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 0.2, "electric_tank_over_gas_tank_per_year_usd": 289.39, "gas_tank_over_heat_pump_per_year_usd": 81.66, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 27 }, "estimated": { "gas_usd_per_therm": 0.7447, "cost_per_month_usd": { "gas_tank": 11.85, "gas_tankless": 7.24, "electric_tank": 41.54, "heat_pump": 10.62 }, "cost_per_year_usd": { "gas_tank": 142.23, "gas_tankless": 86.88, "electric_tank": 498.51, "heat_pump": 127.45 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 46.7, "electric_tank_over_gas_tank_per_year_usd": 356.28, "gas_tank_over_heat_pump_per_year_usd": 14.78, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 26 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 13.38, "gas_tankless": 7.35, "electric_tank": 29.03, "heat_pump": 9.18 }, "cost_per_year_usd": { "gas_tank": 160.56, "gas_tankless": 88.25, "electric_tank": 348.32, "heat_pump": 110.21 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 17.43, "gas_tankless": 10.64, "electric_tank": 41.54, "heat_pump": 10.62 }, "cost_per_year_usd": { "gas_tank": 209.11, "gas_tankless": 127.73, "electric_tank": 498.51, "heat_pump": 127.45 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 24.13, "gas_tankless": 16.26, "electric_tank": 62.82, "heat_pump": 15.06 }, "cost_per_year_usd": { "gas_tank": 289.58, "gas_tankless": 195.09, "electric_tank": 753.82, "heat_pump": 180.72 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 1.591, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 27.68, "propane_tankless": 16.92, "electric_tank": 41.54, "heat_pump": 10.62 }, "cost_per_year_usd": { "propane_tank": 332.2, "propane_tankless": 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"electric_tank": 40.92, "heat_pump": 10.46 }, "cost_per_year_usd": { "gas_tank": 297.18, "gas_tankless": 181.52, "electric_tank": 491.1, "heat_pump": 125.56 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 44.6, "electric_tank_over_gas_tank_per_year_usd": 193.92, "gas_tank_over_heat_pump_per_year_usd": 171.62, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 42 }, "estimated": { "gas_usd_per_therm": 0.9834, "cost_per_month_usd": { "gas_tank": 15.65, "gas_tankless": 9.56, "electric_tank": 40.92, "heat_pump": 10.46 }, "cost_per_year_usd": { "gas_tank": 187.82, "gas_tankless": 114.72, "electric_tank": 491.1, "heat_pump": 125.56 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 9.4, "electric_tank_over_gas_tank_per_year_usd": 303.28, "gas_tank_over_heat_pump_per_year_usd": 62.26, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 37 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 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2024", "gas_estimated_usd_per_therm": 1.3782, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.5549, "cost_per_month_usd": { "gas_tank": 24.75, "gas_tankless": 15.12, "electric_tank": 61.83, "heat_pump": 15.81 }, "cost_per_year_usd": { "gas_tank": 296.97, "gas_tankless": 181.39, "electric_tank": 741.94, "heat_pump": 189.69 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 4.6, "electric_tank_over_gas_tank_per_year_usd": 444.97, "gas_tank_over_heat_pump_per_year_usd": 107.28, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 15 }, "estimated": { "gas_usd_per_therm": 1.3782, "cost_per_month_usd": { "gas_tank": 21.94, "gas_tankless": 13.4, "electric_tank": 61.83, "heat_pump": 15.81 }, "cost_per_year_usd": { "gas_tank": 263.22, "gas_tankless": 160.78, "electric_tank": 741.94, "heat_pump": 189.69 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 18.0, "electric_tank_over_gas_tank_per_year_usd": 478.72, 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"assumed" } }, "MT": { "code": "MT", "name": "Montana", "slug": "montana", "electricity_cents_per_kwh": 13.84, "gas_usd_per_therm": 0.8686, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.694, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 0.8686, "cost_per_month_usd": { "gas_tank": 13.82, "gas_tankless": 8.44, "electric_tank": 40.69, "heat_pump": 10.4 }, "cost_per_year_usd": { "gas_tank": 165.89, "gas_tankless": 101.33, "electric_tank": 488.28, "heat_pump": 124.84 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 23.2, "electric_tank_over_gas_tank_per_year_usd": 322.38, "gas_tank_over_heat_pump_per_year_usd": 41.06, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 23 }, "estimated": { "gas_usd_per_therm": 0.694, "cost_per_month_usd": { "gas_tank": 11.05, "gas_tankless": 6.75, "electric_tank": 40.69, "heat_pump": 10.4 }, "cost_per_year_usd": { "gas_tank": 132.55, "gas_tankless": 80.96, "electric_tank": 488.28, "heat_pump": 124.84 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 54.2, "electric_tank_over_gas_tank_per_year_usd": 355.73, "gas_tank_over_heat_pump_per_year_usd": 7.71, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 27 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 10.61, "gas_tankless": 5.83, "electric_tank": 28.43, "heat_pump": 9.0 }, "cost_per_year_usd": { "gas_tank": 127.37, "gas_tankless": 70.01, "electric_tank": 341.17, "heat_pump": 107.95 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 13.82, "gas_tankless": 8.44, "electric_tank": 40.69, "heat_pump": 10.4 }, "cost_per_year_usd": { "gas_tank": 165.89, "gas_tankless": 101.33, "electric_tank": 488.28, "heat_pump": 124.84 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 19.14, "gas_tankless": 12.9, "electric_tank": 61.53, "heat_pump": 14.75 }, "cost_per_year_usd": { "gas_tank": 229.73, "gas_tankless": 154.77, "electric_tank": 738.35, "heat_pump": 177.01 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 2.024, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 35.22, "propane_tankless": 21.52, "electric_tank": 40.69, "heat_pump": 10.4 }, "cost_per_year_usd": { "propane_tank": 422.61, "propane_tankless": 258.26, "electric_tank": 488.28, "heat_pump": 124.84 }, "cheapest": "heat_pump", "status": "assumed" } }, "NE": { "code": "NE", "name": "Nebraska", "slug": "nebraska", "electricity_cents_per_kwh": 12.86, "gas_usd_per_therm": 1.2261, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.7582, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.2261, "cost_per_month_usd": { "gas_tank": 19.51, "gas_tankless": 11.92, "electric_tank": 37.81, "heat_pump": 9.67 }, "cost_per_year_usd": { "gas_tank": 234.17, "gas_tankless": 143.04, "electric_tank": 453.7, "heat_pump": 116.0 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 23.3, "electric_tank_over_gas_tank_per_year_usd": 219.53, "gas_tank_over_heat_pump_per_year_usd": 118.18, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 39 }, "estimated": { "gas_usd_per_therm": 0.7582, "cost_per_month_usd": { "gas_tank": 12.07, "gas_tankless": 7.37, "electric_tank": 37.81, "heat_pump": 9.67 }, "cost_per_year_usd": { "gas_tank": 144.81, "gas_tankless": 88.45, "electric_tank": 453.7, "heat_pump": 116.0 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 31.1, "electric_tank_over_gas_tank_per_year_usd": 308.89, "gas_tank_over_heat_pump_per_year_usd": 28.81, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 36 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 14.98, "gas_tankless": 8.24, "electric_tank": 26.42, "heat_pump": 8.36 }, "cost_per_year_usd": { "gas_tank": 179.8, "gas_tankless": 98.82, "electric_tank": 317.01, "heat_pump": 100.31 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 19.51, "gas_tankless": 11.92, "electric_tank": 37.81, "heat_pump": 9.67 }, "cost_per_year_usd": { "gas_tank": 234.17, "gas_tankless": 143.04, "electric_tank": 453.7, "heat_pump": 116.0 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 27.02, "gas_tankless": 18.21, "electric_tank": 57.17, "heat_pump": 13.71 }, "cost_per_year_usd": { "gas_tank": 324.28, "gas_tankless": 218.47, "electric_tank": 686.07, "heat_pump": 164.48 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 1.606, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 27.94, "propane_tankless": 17.08, "electric_tank": 37.81, "heat_pump": 9.67 }, "cost_per_year_usd": { "propane_tank": 335.33, "propane_tankless": 204.93, "electric_tank": 453.7, "heat_pump": 116.0 }, "cheapest": "heat_pump", "status": "assumed" } }, "NV": { "code": "NV", "name": "Nevada", "slug": "nevada", "electricity_cents_per_kwh": 13.36, "gas_usd_per_therm": 1.0807, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": null, "gas_estimated_reason": "poor_fit", "eia_average": { "gas_usd_per_therm": 1.0807, "cost_per_month_usd": { "gas_tank": 17.2, "gas_tankless": 10.51, "electric_tank": 39.28, "heat_pump": 10.04 }, "cost_per_year_usd": { "gas_tank": 206.4, "gas_tankless": 126.07, "electric_tank": 471.34, "heat_pump": 120.51 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 4.6, "electric_tank_over_gas_tank_per_year_usd": 264.94, "gas_tank_over_heat_pump_per_year_usd": 85.9, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 30 }, "estimated": { "gas_usd_per_therm": 1.0807, "cost_per_month_usd": { "gas_tank": 17.2, "gas_tankless": 10.51, "electric_tank": 39.28, "heat_pump": 10.04 }, "cost_per_year_usd": { "gas_tank": 206.4, "gas_tankless": 126.07, "electric_tank": 471.34, "heat_pump": 120.51 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 4.6, "electric_tank_over_gas_tank_per_year_usd": 264.94, "gas_tank_over_heat_pump_per_year_usd": 85.9, "gas_price_basis": "eia_average_fallback", "electric_tank_over_gas_tank_rank": 46 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 13.21, "gas_tankless": 7.26, "electric_tank": 27.44, "heat_pump": 8.68 }, "cost_per_year_usd": { "gas_tank": 158.47, "gas_tankless": 87.1, "electric_tank": 329.34, "heat_pump": 104.21 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 17.2, "gas_tankless": 10.51, "electric_tank": 39.28, "heat_pump": 10.04 }, "cost_per_year_usd": { "gas_tank": 206.4, "gas_tankless": 126.07, "electric_tank": 471.34, "heat_pump": 120.51 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 23.82, "gas_tankless": 16.05, "electric_tank": 59.4, "heat_pump": 14.24 }, "cost_per_year_usd": { "gas_tank": 285.82, "gas_tankless": 192.56, "electric_tank": 712.74, "heat_pump": 170.87 }, "cheapest": "heat_pump" } }, "propane": null }, "NH": { "code": "NH", "name": "New Hampshire", "slug": "new-hampshire", "electricity_cents_per_kwh": 26.67, "gas_usd_per_therm": 1.7911, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2025", "gas_estimated_usd_per_therm": null, "gas_estimated_reason": "poor_fit", "eia_average": { "gas_usd_per_therm": 1.7911, "cost_per_month_usd": { "gas_tank": 28.51, "gas_tankless": 17.41, "electric_tank": 78.41, "heat_pump": 20.05 }, "cost_per_year_usd": { "gas_tank": 342.08, "gas_tankless": 208.95, "electric_tank": 940.92, "heat_pump": 240.56 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 15.1, "electric_tank_over_gas_tank_per_year_usd": 598.84, "gas_tank_over_heat_pump_per_year_usd": 101.52, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 7 }, "estimated": { "gas_usd_per_therm": 1.7911, "cost_per_month_usd": { "gas_tank": 28.51, "gas_tankless": 17.41, "electric_tank": 78.41, "heat_pump": 20.05 }, "cost_per_year_usd": { "gas_tank": 342.08, "gas_tankless": 208.95, "electric_tank": 940.92, "heat_pump": 240.56 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 15.1, "electric_tank_over_gas_tank_per_year_usd": 598.84, "gas_tank_over_heat_pump_per_year_usd": 101.52, "gas_price_basis": "eia_average_fallback", "electric_tank_over_gas_tank_rank": 9 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 21.89, "gas_tankless": 12.03, "electric_tank": 54.79, "heat_pump": 17.34 }, "cost_per_year_usd": { "gas_tank": 262.65, "gas_tankless": 144.36, "electric_tank": 657.44, "heat_pump": 208.03 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 28.51, "gas_tankless": 17.41, "electric_tank": 78.41, "heat_pump": 20.05 }, "cost_per_year_usd": { 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"gas_tank_over_heat_pump_per_year_usd": 17.94, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 7 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 17.39, "gas_tankless": 9.56, "electric_tank": 48.85, "heat_pump": 15.46 }, "cost_per_year_usd": { "gas_tank": 208.62, "gas_tankless": 114.67, "electric_tank": 586.2, "heat_pump": 185.48 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 22.64, "gas_tankless": 13.83, "electric_tank": 69.91, "heat_pump": 17.87 }, "cost_per_year_usd": { "gas_tank": 271.72, "gas_tankless": 165.97, "electric_tank": 838.96, "heat_pump": 214.5 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 31.36, "gas_tankless": 21.12, "electric_tank": 105.72, "heat_pump": 25.35 }, "cost_per_year_usd": { "gas_tank": 376.28, "gas_tankless": 253.5, "electric_tank": 1268.64, "heat_pump": 304.15 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 3.628, "period_start": 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"gas_tankless": 9.37, "electric_tank": 44.81, "heat_pump": 11.46 }, "cost_per_year_usd": { "gas_tank": 184.06, "gas_tankless": 112.43, "electric_tank": 537.67, "heat_pump": 137.46 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 21.24, "gas_tankless": 14.31, "electric_tank": 67.75, "heat_pump": 16.24 }, "cost_per_year_usd": { "gas_tank": 254.88, "gas_tankless": 171.71, "electric_tank": 813.04, "heat_pump": 194.92 }, "cheapest": "gas_tankless" } }, "propane": null }, "NY": { "code": "NY", "name": "New York", "slug": "new-york", "electricity_cents_per_kwh": 28.39, "gas_usd_per_therm": 1.8138, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.4226, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.8138, "cost_per_month_usd": { "gas_tank": 28.87, "gas_tankless": 17.63, "electric_tank": 83.47, "heat_pump": 21.34 }, "cost_per_year_usd": { "gas_tank": 346.42, "gas_tankless": 211.6, "electric_tank": 1001.6, "heat_pump": 256.08 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 21.0, "electric_tank_over_gas_tank_per_year_usd": 655.18, "gas_tank_over_heat_pump_per_year_usd": 90.34, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 5 }, "estimated": { "gas_usd_per_therm": 1.4226, "cost_per_month_usd": { "gas_tank": 22.64, "gas_tankless": 13.83, "electric_tank": 83.47, "heat_pump": 21.34 }, "cost_per_year_usd": { "gas_tank": 271.7, "gas_tankless": 165.96, "electric_tank": 1001.6, "heat_pump": 256.08 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 54.3, "electric_tank_over_gas_tank_per_year_usd": 729.9, "gas_tank_over_heat_pump_per_year_usd": 15.62, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 4 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 22.16, "gas_tankless": 12.18, "electric_tank": 58.32, "heat_pump": 18.45 }, "cost_per_year_usd": { "gas_tank": 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"heat_pump", "status": "assumed" } }, "NC": { "code": "NC", "name": "North Carolina", "slug": "north-carolina", "electricity_cents_per_kwh": 14.77, "gas_usd_per_therm": 1.5819, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2024", "gas_estimated_usd_per_therm": 1.5072, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.5819, "cost_per_month_usd": { "gas_tank": 25.18, "gas_tankless": 15.38, "electric_tank": 43.42, "heat_pump": 11.1 }, "cost_per_year_usd": { "gas_tank": 302.13, "gas_tankless": 184.54, "electric_tank": 521.09, "heat_pump": 133.23 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 38.5, "electric_tank_over_gas_tank_per_year_usd": 218.96, "gas_tank_over_heat_pump_per_year_usd": 168.9, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 40 }, "estimated": { "gas_usd_per_therm": 1.5072, "cost_per_month_usd": { "gas_tank": 23.99, "gas_tankless": 14.65, "electric_tank": 43.42, "heat_pump": 11.1 }, "cost_per_year_usd": { "gas_tank": 287.86, "gas_tankless": 175.83, "electric_tank": 521.09, "heat_pump": 133.23 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 32.0, "electric_tank_over_gas_tank_per_year_usd": 233.23, "gas_tank_over_heat_pump_per_year_usd": 154.63, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 50 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 19.33, "gas_tankless": 10.63, "electric_tank": 30.34, "heat_pump": 9.6 }, "cost_per_year_usd": { "gas_tank": 231.97, "gas_tankless": 127.5, "electric_tank": 364.1, "heat_pump": 115.21 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 25.18, "gas_tankless": 15.38, "electric_tank": 43.42, "heat_pump": 11.1 }, "cost_per_year_usd": { "gas_tank": 302.13, "gas_tankless": 184.54, "electric_tank": 521.09, "heat_pump": 133.23 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 34.87, "gas_tankless": 23.49, "electric_tank": 65.66, "heat_pump": 15.74 }, "cost_per_year_usd": { "gas_tank": 418.38, "gas_tankless": 281.86, "electric_tank": 787.96, "heat_pump": 188.91 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 3.358, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 58.43, "propane_tankless": 35.71, "electric_tank": 43.42, "heat_pump": 11.1 }, "cost_per_year_usd": { "propane_tank": 701.15, "propane_tankless": 428.48, "electric_tank": 521.09, "heat_pump": 133.23 }, "cheapest": "heat_pump", "status": "assumed" } }, "ND": { "code": "ND", "name": "North Dakota", "slug": "north-dakota", "electricity_cents_per_kwh": 12.32, "gas_usd_per_therm": 0.9692, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.5128, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 0.9692, "cost_per_month_usd": { "gas_tank": 15.43, "gas_tankless": 9.42, "electric_tank": 36.22, "heat_pump": 9.26 }, "cost_per_year_usd": { "gas_tank": 185.11, "gas_tankless": 113.07, "electric_tank": 434.65, "heat_pump": 111.13 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 1.7, "electric_tank_over_gas_tank_per_year_usd": 249.54, "gas_tank_over_heat_pump_per_year_usd": 73.98, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 34 }, "estimated": { "gas_usd_per_therm": 0.5128, "cost_per_month_usd": { "gas_tank": 8.16, "gas_tankless": 4.99, "electric_tank": 36.22, "heat_pump": 9.26 }, "cost_per_year_usd": { "gas_tank": 97.94, "gas_tankless": 59.82, "electric_tank": 434.65, "heat_pump": 111.13 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 63.7, "electric_tank_over_gas_tank_per_year_usd": 336.71, "gas_tank_over_heat_pump_per_year_usd": -13.19, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 31 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 11.84, "gas_tankless": 6.51, "electric_tank": 25.31, "heat_pump": 8.01 }, "cost_per_year_usd": { "gas_tank": 142.12, "gas_tankless": 78.12, "electric_tank": 303.7, "heat_pump": 96.1 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 15.43, "gas_tankless": 9.42, "electric_tank": 36.22, "heat_pump": 9.26 }, "cost_per_year_usd": { "gas_tank": 185.11, "gas_tankless": 113.07, "electric_tank": 434.65, "heat_pump": 111.13 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 21.36, "gas_tankless": 14.39, "electric_tank": 54.77, "heat_pump": 13.13 }, "cost_per_year_usd": { "gas_tank": 256.33, "gas_tankless": 172.69, "electric_tank": 657.26, "heat_pump": 157.57 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 1.63, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 28.36, "propane_tankless": 17.33, "electric_tank": 36.22, "heat_pump": 9.26 }, "cost_per_year_usd": { "propane_tank": 340.34, "propane_tankless": 207.99, "electric_tank": 434.65, "heat_pump": 111.13 }, "cheapest": "heat_pump", "status": "assumed" } }, "OH": { "code": "OH", "name": "Ohio", "slug": "ohio", "electricity_cents_per_kwh": 18.25, "gas_usd_per_therm": 1.3041, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2025", "gas_estimated_usd_per_therm": 0.7139, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.3041, "cost_per_month_usd": { "gas_tank": 20.76, "gas_tankless": 12.68, "electric_tank": 53.66, "heat_pump": 13.72 }, "cost_per_year_usd": { "gas_tank": 249.07, "gas_tankless": 152.14, "electric_tank": 643.86, "heat_pump": 164.62 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 8.2, "electric_tank_over_gas_tank_per_year_usd": 394.79, "gas_tank_over_heat_pump_per_year_usd": 84.46, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 18 }, "estimated": { "gas_usd_per_therm": 0.7139, "cost_per_month_usd": { "gas_tank": 11.36, "gas_tankless": 6.94, "electric_tank": 53.66, "heat_pump": 13.72 }, "cost_per_year_usd": { "gas_tank": 136.35, "gas_tankless": 83.28, "electric_tank": 643.86, "heat_pump": 164.62 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 63.7, "electric_tank_over_gas_tank_per_year_usd": 507.51, "gas_tank_over_heat_pump_per_year_usd": -28.27, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 15 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 15.94, "gas_tankless": 8.76, "electric_tank": 37.49, "heat_pump": 11.86 }, "cost_per_year_usd": { "gas_tank": 191.23, "gas_tankless": 105.11, "electric_tank": 449.88, "heat_pump": 142.35 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 20.76, "gas_tankless": 12.68, "electric_tank": 53.66, "heat_pump": 13.72 }, "cost_per_year_usd": { "gas_tank": 249.07, "gas_tankless": 152.14, "electric_tank": 643.86, "heat_pump": 164.62 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": 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"electric_tank": 40.28, "heat_pump": 10.3 }, "cost_per_year_usd": { "gas_tank": 264.6, "gas_tankless": 161.62, "electric_tank": 483.34, "heat_pump": 123.57 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 30.8, "electric_tank_over_gas_tank_per_year_usd": 218.74, "gas_tank_over_heat_pump_per_year_usd": 141.02, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 41 }, "estimated": { "gas_usd_per_therm": 0.8046, "cost_per_month_usd": { "gas_tank": 12.81, "gas_tankless": 7.82, "electric_tank": 40.28, "heat_pump": 10.3 }, "cost_per_year_usd": { "gas_tank": 153.67, "gas_tankless": 93.86, "electric_tank": 483.34, "heat_pump": 123.57 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 31.7, "electric_tank_over_gas_tank_per_year_usd": 329.67, "gas_tank_over_heat_pump_per_year_usd": 30.1, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 34 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 16.93, "gas_tankless": 9.31, "electric_tank": 28.14, "heat_pump": 8.91 }, "cost_per_year_usd": { "gas_tank": 203.16, "gas_tankless": 111.66, "electric_tank": 337.72, "heat_pump": 106.86 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 22.05, "gas_tankless": 13.47, "electric_tank": 40.28, "heat_pump": 10.3 }, "cost_per_year_usd": { "gas_tank": 264.6, "gas_tankless": 161.62, "electric_tank": 483.34, "heat_pump": 123.57 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 30.53, "gas_tankless": 20.57, "electric_tank": 60.91, "heat_pump": 14.6 }, "cost_per_year_usd": { "gas_tank": 366.41, "gas_tankless": 246.85, "electric_tank": 730.88, "heat_pump": 175.22 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 2.224, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 38.7, "propane_tankless": 23.65, "electric_tank": 40.28, "heat_pump": 10.3 }, "cost_per_year_usd": { "propane_tank": 464.37, "propane_tankless": 283.78, "electric_tank": 483.34, "heat_pump": 123.57 }, "cheapest": "heat_pump", "status": "assumed" } }, "OR": { "code": "OR", "name": "Oregon", "slug": "oregon", "electricity_cents_per_kwh": 15.5, "gas_usd_per_therm": 1.6172, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.3319, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.6172, "cost_per_month_usd": { "gas_tank": 25.74, "gas_tankless": 15.72, "electric_tank": 45.57, "heat_pump": 11.65 }, "cost_per_year_usd": { "gas_tank": 308.87, "gas_tankless": 188.66, "electric_tank": 546.84, "heat_pump": 139.81 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 34.9, "electric_tank_over_gas_tank_per_year_usd": 237.97, "gas_tank_over_heat_pump_per_year_usd": 169.06, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 37 }, "estimated": { "gas_usd_per_therm": 1.3319, "cost_per_month_usd": { "gas_tank": 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"heat_pump": 15.56 }, "cost_per_year_usd": { "gas_tank": 294.11, "gas_tankless": 179.64, "electric_tank": 730.3, "heat_pump": 186.71 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 33.94, "gas_tankless": 22.86, "electric_tank": 92.03, "heat_pump": 22.06 }, "cost_per_year_usd": { "gas_tank": 407.27, "gas_tankless": 274.38, "electric_tank": 1104.32, "heat_pump": 264.75 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 2.932, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 51.02, "propane_tankless": 31.18, "electric_tank": 60.86, "heat_pump": 15.56 }, "cost_per_year_usd": { "propane_tank": 612.2, "propane_tankless": 374.12, "electric_tank": 730.3, "heat_pump": 186.71 }, "cheapest": "heat_pump", "status": "assumed" } }, "RI": { "code": "RI", "name": "Rhode Island", "slug": "rhode-island", "electricity_cents_per_kwh": 29.27, "gas_usd_per_therm": 2.107, "gas_basis": "calendar_year", "gas_period_label": 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35.4, "electric_tank_over_gas_tank_per_year_usd": 239.13, "gas_tank_over_heat_pump_per_year_usd": 171.58, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 35 }, "estimated": { "gas_usd_per_therm": 1.4618, "cost_per_month_usd": { "gas_tank": 23.27, "gas_tankless": 14.21, "electric_tank": 45.98, "heat_pump": 11.76 }, "cost_per_year_usd": { "gas_tank": 279.19, "gas_tankless": 170.53, "electric_tank": 551.78, "heat_pump": 141.07 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 20.9, "electric_tank_over_gas_tank_per_year_usd": 272.59, "gas_tank_over_heat_pump_per_year_usd": 138.12, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 42 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 20.0, "gas_tankless": 11.0, "electric_tank": 32.13, "heat_pump": 10.17 }, "cost_per_year_usd": { "gas_tank": 240.05, "gas_tankless": 131.94, "electric_tank": 385.54, "heat_pump": 121.99 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 26.05, "gas_tankless": 15.91, "electric_tank": 45.98, "heat_pump": 11.76 }, "cost_per_year_usd": { "gas_tank": 312.65, "gas_tankless": 190.97, "electric_tank": 551.78, "heat_pump": 141.07 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 36.08, "gas_tankless": 24.31, "electric_tank": 69.53, "heat_pump": 16.67 }, "cost_per_year_usd": { "gas_tank": 432.95, "gas_tankless": 291.68, "electric_tank": 834.38, "heat_pump": 200.04 }, "cheapest": "heat_pump" } }, "propane": null }, "SD": { "code": "SD", "name": "South Dakota", "slug": "south-dakota", "electricity_cents_per_kwh": 14.2, "gas_usd_per_therm": 0.9904, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.7158, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 0.9904, "cost_per_month_usd": { "gas_tank": 15.76, "gas_tankless": 9.63, "electric_tank": 41.75, "heat_pump": 10.67 }, "cost_per_year_usd": 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9.23 }, "cost_per_year_usd": { "gas_tank": 145.23, "gas_tankless": 79.83, "electric_tank": 350.04, "heat_pump": 110.76 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 15.76, "gas_tankless": 9.63, "electric_tank": 41.75, "heat_pump": 10.67 }, "cost_per_year_usd": { "gas_tank": 189.16, "gas_tankless": 115.54, "electric_tank": 500.98, "heat_pump": 128.08 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 21.83, "gas_tankless": 14.71, "electric_tank": 63.13, "heat_pump": 15.13 }, "cost_per_year_usd": { "gas_tank": 261.94, "gas_tankless": 176.47, "electric_tank": 757.56, "heat_pump": 181.62 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 1.79, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 31.15, "propane_tankless": 19.03, "electric_tank": 41.75, "heat_pump": 10.67 }, "cost_per_year_usd": { "propane_tank": 373.75, "propane_tankless": 228.4, "electric_tank": 500.98, "heat_pump": 128.08 }, "cheapest": "heat_pump", "status": "assumed" } }, "TN": { "code": "TN", "name": "Tennessee", "slug": "tennessee", "electricity_cents_per_kwh": 13.56, "gas_usd_per_therm": 1.3016, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.9475, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.3016, "cost_per_month_usd": { "gas_tank": 20.72, "gas_tankless": 12.65, "electric_tank": 39.87, "heat_pump": 10.19 }, "cost_per_year_usd": { "gas_tank": 248.59, "gas_tankless": 151.84, "electric_tank": 478.4, "heat_pump": 122.31 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 24.1, "electric_tank_over_gas_tank_per_year_usd": 229.8, "gas_tank_over_heat_pump_per_year_usd": 126.28, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 38 }, "estimated": { "gas_usd_per_therm": 0.9475, "cost_per_month_usd": { "gas_tank": 15.08, "gas_tankless": 9.21, "electric_tank": 39.87, "heat_pump": 10.19 }, "cost_per_year_usd": { "gas_tank": 180.96, "gas_tankless": 110.54, "electric_tank": 478.4, "heat_pump": 122.31 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 10.7, "electric_tank_over_gas_tank_per_year_usd": 297.43, "gas_tank_over_heat_pump_per_year_usd": 58.65, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 38 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 15.91, "gas_tankless": 8.74, "electric_tank": 27.86, "heat_pump": 8.81 }, "cost_per_year_usd": { "gas_tank": 190.87, "gas_tankless": 104.91, "electric_tank": 334.27, "heat_pump": 105.77 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 20.72, "gas_tankless": 12.65, "electric_tank": 39.87, "heat_pump": 10.19 }, "cost_per_year_usd": { "gas_tank": 248.59, "gas_tankless": 151.84, "electric_tank": 478.4, "heat_pump": 122.31 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 28.69, "gas_tankless": 19.33, "electric_tank": 60.28, "heat_pump": 14.45 }, "cost_per_year_usd": { "gas_tank": 344.25, "gas_tankless": 231.92, "electric_tank": 723.41, "heat_pump": 173.43 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 3.145, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 54.72, "propane_tankless": 33.44, "electric_tank": 39.87, "heat_pump": 10.19 }, "cost_per_year_usd": { "propane_tank": 656.68, "propane_tankless": 401.3, "electric_tank": 478.4, "heat_pump": 122.31 }, "cheapest": "heat_pump", "status": "assumed" } }, "TX": { "code": "TX", "name": "Texas", "slug": "texas", "electricity_cents_per_kwh": 15.96, "gas_usd_per_therm": 2.2403, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 1.2523, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 2.2403, "cost_per_month_usd": { "gas_tank": 35.66, "gas_tankless": 21.78, "electric_tank": 46.92, "heat_pump": 12.0 }, "cost_per_year_usd": { "gas_tank": 427.87, "gas_tankless": 261.35, "electric_tank": 563.07, "heat_pump": 143.96 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 81.5, "electric_tank_over_gas_tank_per_year_usd": 135.19, "gas_tank_over_heat_pump_per_year_usd": 283.92, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 47 }, "estimated": { "gas_usd_per_therm": 1.2523, "cost_per_month_usd": { "gas_tank": 19.93, "gas_tankless": 12.17, "electric_tank": 46.92, "heat_pump": 12.0 }, "cost_per_year_usd": { "gas_tank": 239.18, "gas_tankless": 146.09, "electric_tank": 563.07, "heat_pump": 143.96 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 1.5, "electric_tank_over_gas_tank_per_year_usd": 323.89, "gas_tank_over_heat_pump_per_year_usd": 95.22, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 35 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 27.38, "gas_tankless": 15.05, "electric_tank": 32.79, "heat_pump": 10.37 }, "cost_per_year_usd": { "gas_tank": 328.52, "gas_tankless": 180.57, "electric_tank": 393.43, "heat_pump": 124.49 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 35.66, "gas_tankless": 21.78, "electric_tank": 46.92, "heat_pump": 12.0 }, "cost_per_year_usd": { "gas_tank": 427.87, "gas_tankless": 261.35, "electric_tank": 563.07, "heat_pump": 143.96 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 49.38, "gas_tankless": 33.26, "electric_tank": 70.95, "heat_pump": 17.01 }, "cost_per_year_usd": { "gas_tank": 592.51, "gas_tankless": 399.18, "electric_tank": 851.45, "heat_pump": 204.13 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 2.939, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 51.14, "propane_tankless": 31.25, "electric_tank": 46.92, "heat_pump": 12.0 }, "cost_per_year_usd": { "propane_tank": 613.66, "propane_tankless": 375.02, "electric_tank": 563.07, "heat_pump": 143.96 }, "cheapest": "heat_pump", "status": "assumed" } }, "UT": { "code": "UT", "name": "Utah", "slug": "utah", "electricity_cents_per_kwh": 13.32, "gas_usd_per_therm": 1.0557, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": null, "gas_estimated_reason": "poor_fit", "eia_average": { "gas_usd_per_therm": 1.0557, "cost_per_month_usd": { "gas_tank": 16.8, "gas_tankless": 10.26, "electric_tank": 39.16, "heat_pump": 10.01 }, "cost_per_year_usd": { "gas_tank": 201.63, "gas_tankless": 123.16, "electric_tank": 469.93, "heat_pump": 120.15 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 2.5, "electric_tank_over_gas_tank_per_year_usd": 268.3, "gas_tank_over_heat_pump_per_year_usd": 81.48, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 29 }, "estimated": { "gas_usd_per_therm": 1.0557, "cost_per_month_usd": { "gas_tank": 16.8, "gas_tankless": 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"cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 37.8, "gas_tankless": 25.47, "electric_tank": 73.27, "heat_pump": 17.56 }, "cost_per_year_usd": { "gas_tank": 453.61, "gas_tankless": 305.6, "electric_tank": 879.19, "heat_pump": 210.78 }, "cheapest": "heat_pump" } }, "propane": { "usd_per_gallon": 3.461, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 60.22, "propane_tankless": 36.8, "electric_tank": 48.45, "heat_pump": 12.39 }, "cost_per_year_usd": { "propane_tank": 722.66, "propane_tankless": 441.62, "electric_tank": 581.41, "heat_pump": 148.65 }, "cheapest": "heat_pump", "status": "assumed" } }, "WA": { "code": "WA", "name": "Washington", "slug": "washington", "electricity_cents_per_kwh": 14.12, "gas_usd_per_therm": 1.6077, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2025", "gas_estimated_usd_per_therm": 1.2135, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.6077, "cost_per_month_usd": { "gas_tank": 25.59, "gas_tankless": 15.63, "electric_tank": 41.51, "heat_pump": 10.61 }, "cost_per_year_usd": { "gas_tank": 307.05, "gas_tankless": 187.55, "electric_tank": 498.15, "heat_pump": 127.36 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 47.3, "electric_tank_over_gas_tank_per_year_usd": 191.1, "gas_tank_over_heat_pump_per_year_usd": 179.69, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 44 }, "estimated": { "gas_usd_per_therm": 1.2135, "cost_per_month_usd": { "gas_tank": 19.31, "gas_tankless": 11.8, "electric_tank": 41.51, "heat_pump": 10.61 }, "cost_per_year_usd": { "gas_tank": 231.77, "gas_tankless": 141.57, "electric_tank": 498.15, "heat_pump": 127.36 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 11.2, "electric_tank_over_gas_tank_per_year_usd": 266.39, "gas_tank_over_heat_pump_per_year_usd": 104.4, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 45 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 19.65, "gas_tankless": 10.8, "electric_tank": 29.01, "heat_pump": 9.18 }, "cost_per_year_usd": { "gas_tank": 235.75, "gas_tankless": 129.58, "electric_tank": 348.07, "heat_pump": 110.14 }, "cheapest": "heat_pump" }, "medium": { "cost_per_month_usd": { "gas_tank": 25.59, "gas_tankless": 15.63, "electric_tank": 41.51, "heat_pump": 10.61 }, "cost_per_year_usd": { "gas_tank": 307.05, "gas_tankless": 187.55, "electric_tank": 498.15, "heat_pump": 127.36 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 35.43, "gas_tankless": 23.87, "electric_tank": 62.77, "heat_pump": 15.05 }, "cost_per_year_usd": { "gas_tank": 425.2, "gas_tankless": 286.46, "electric_tank": 753.29, "heat_pump": 180.59 }, "cheapest": "heat_pump" } }, "propane": null }, "WV": { "code": "WV", "name": "West Virginia", "slug": "west-virginia", "electricity_cents_per_kwh": 15.48, "gas_usd_per_therm": 1.2695, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2025", "gas_estimated_usd_per_therm": 1.0216, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.2695, "cost_per_month_usd": { "gas_tank": 20.21, "gas_tankless": 12.34, "electric_tank": 45.51, "heat_pump": 11.64 }, "cost_per_year_usd": { "gas_tank": 242.46, "gas_tankless": 148.1, "electric_tank": 546.13, "heat_pump": 139.63 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 6.1, "electric_tank_over_gas_tank_per_year_usd": 303.67, "gas_tank_over_heat_pump_per_year_usd": 102.83, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 25 }, "estimated": { "gas_usd_per_therm": 1.0216, "cost_per_month_usd": { "gas_tank": 16.26, "gas_tankless": 9.93, "electric_tank": 45.51, "heat_pump": 11.64 }, "cost_per_year_usd": { "gas_tank": 195.12, "gas_tankless": 119.18, "electric_tank": 546.13, "heat_pump": 139.63 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 17.2, "electric_tank_over_gas_tank_per_year_usd": 351.02, "gas_tank_over_heat_pump_per_year_usd": 55.49, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 29 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 15.51, "gas_tankless": 8.53, "electric_tank": 31.8, "heat_pump": 10.06 }, "cost_per_year_usd": { "gas_tank": 186.16, "gas_tankless": 102.32, "electric_tank": 381.6, "heat_pump": 120.74 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 20.21, "gas_tankless": 12.34, "electric_tank": 45.51, "heat_pump": 11.64 }, "cost_per_year_usd": { "gas_tank": 242.46, "gas_tankless": 148.1, "electric_tank": 546.13, "heat_pump": 139.63 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 27.98, "gas_tankless": 18.85, "electric_tank": 68.82, "heat_pump": 16.5 }, "cost_per_year_usd": { "gas_tank": 335.76, "gas_tankless": 226.2, "electric_tank": 825.84, "heat_pump": 197.99 }, "cheapest": "heat_pump" } }, "propane": null }, "WI": { "code": "WI", "name": "Wisconsin", "slug": "wisconsin", "electricity_cents_per_kwh": 18.74, "gas_usd_per_therm": 1.0238, "gas_basis": "calendar_year", "gas_period_label": "calendar year 2025", "gas_estimated_usd_per_therm": 0.8554, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.0238, "cost_per_month_usd": { "gas_tank": 16.29, "gas_tankless": 9.95, "electric_tank": 55.1, "heat_pump": 14.09 }, "cost_per_year_usd": { "gas_tank": 195.54, "gas_tankless": 119.44, "electric_tank": 661.15, "heat_pump": 169.03 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 41.5, "electric_tank_over_gas_tank_per_year_usd": 465.61, "gas_tank_over_heat_pump_per_year_usd": 26.5, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 13 }, "estimated": { "gas_usd_per_therm": 0.8554, "cost_per_month_usd": { "gas_tank": 13.61, "gas_tankless": 8.32, "electric_tank": 55.1, "heat_pump": 14.09 }, "cost_per_year_usd": { "gas_tank": 163.37, "gas_tankless": 99.79, "electric_tank": 661.15, "heat_pump": 169.03 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 63.7, "electric_tank_over_gas_tank_per_year_usd": 497.77, "gas_tank_over_heat_pump_per_year_usd": -5.66, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 16 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 12.51, "gas_tankless": 6.88, "electric_tank": 38.5, "heat_pump": 12.18 }, "cost_per_year_usd": { "gas_tank": 150.13, "gas_tankless": 82.52, "electric_tank": 461.96, "heat_pump": 146.17 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 16.29, "gas_tankless": 9.95, "electric_tank": 55.1, "heat_pump": 14.09 }, "cost_per_year_usd": { "gas_tank": 195.54, "gas_tankless": 119.44, "electric_tank": 661.15, "heat_pump": 169.03 }, "cheapest": "gas_tankless" }, "high": { "cost_per_month_usd": { "gas_tank": 22.56, "gas_tankless": 15.2, "electric_tank": 83.31, "heat_pump": 19.97 }, "cost_per_year_usd": { "gas_tank": 270.77, "gas_tankless": 182.42, "electric_tank": 999.76, "heat_pump": 239.68 }, "cheapest": "gas_tankless" } }, "propane": { "usd_per_gallon": 1.909, "period_start": "2025-10", "period_end": "2026-03", "cost_per_month_usd": { "propane_tank": 33.22, "propane_tankless": 20.3, "electric_tank": 55.1, "heat_pump": 14.09 }, "cost_per_year_usd": { "propane_tank": 398.6, "propane_tankless": 243.59, "electric_tank": 661.15, "heat_pump": 169.03 }, "cheapest": "heat_pump", "status": "assumed" } }, "WY": { "code": "WY", "name": "Wyoming", "slug": "wyoming", "electricity_cents_per_kwh": 14.01, "gas_usd_per_therm": 1.2336, "gas_basis": "trailing_12_months", "gas_period_label": "12 months to Jul 2026", "gas_estimated_usd_per_therm": 0.7818, "gas_estimated_reason": null, "eia_average": { "gas_usd_per_therm": 1.2336, "cost_per_month_usd": { "gas_tank": 19.63, "gas_tankless": 11.99, "electric_tank": 41.19, "heat_pump": 10.53 }, "cost_per_year_usd": { "gas_tank": 235.61, "gas_tankless": 143.91, "electric_tank": 494.27, "heat_pump": 126.37 }, "cheapest": "heat_pump", "dearest": "electric_tank", "margin_pct": 13.9, "electric_tank_over_gas_tank_per_year_usd": 258.67, "gas_tank_over_heat_pump_per_year_usd": 109.24, "gas_price_basis": "eia_average", "electric_tank_over_gas_tank_rank": 32 }, "estimated": { "gas_usd_per_therm": 0.7818, "cost_per_month_usd": { "gas_tank": 12.44, "gas_tankless": 7.6, "electric_tank": 41.19, "heat_pump": 10.53 }, "cost_per_year_usd": { "gas_tank": 149.32, "gas_tankless": 91.2, "electric_tank": 494.27, "heat_pump": 126.37 }, "cheapest": "gas_tankless", "dearest": "electric_tank", "margin_pct": 38.6, "electric_tank_over_gas_tank_per_year_usd": 344.96, "gas_tank_over_heat_pump_per_year_usd": 22.95, "gas_price_basis": "estimated_per_therm", "electric_tank_over_gas_tank_rank": 30 }, "household": { "low": { "cost_per_month_usd": { "gas_tank": 15.07, "gas_tankless": 8.29, "electric_tank": 28.78, "heat_pump": 9.11 }, "cost_per_year_usd": { "gas_tank": 180.9, "gas_tankless": 99.43, "electric_tank": 345.36, "heat_pump": 109.28 }, "cheapest": "gas_tankless" }, "medium": { "cost_per_month_usd": { "gas_tank": 19.63, "gas_tankless": 11.99, "electric_tank": 41.19, "heat_pump": 10.53 }, "cost_per_year_usd": { "gas_tank": 235.61, "gas_tankless": 143.91, "electric_tank": 494.27, "heat_pump": 126.37 }, "cheapest": "heat_pump" }, "high": { "cost_per_month_usd": { "gas_tank": 27.19, "gas_tankless": 18.32, "electric_tank": 62.28, "heat_pump": 14.93 }, "cost_per_year_usd": { "gas_tank": 326.26, "gas_tankless": 219.8, "electric_tank": 747.42, "heat_pump": 179.19 }, "cheapest": "heat_pump" } }, "propane": null } }, "missing": [], "counts": { "eia_average": { "total": 51, "gas_tank_cheaper_than_electric_tank": 51, "heat_pump_cheaper_than_gas_tank": 51, "heat_pump_cheaper_than_gas_tankless": 28, "cheapest": { "gas_tank": 0, "gas_tankless": 23, "electric_tank": 0, "heat_pump": 28 } }, "estimated": { "total": 51, "gas_tank_cheaper_than_electric_tank": 51, "heat_pump_cheaper_than_gas_tank": 42, "heat_pump_cheaper_than_gas_tankless": 17, "cheapest": { "gas_tank": 0, "gas_tankless": 34, "electric_tank": 0, "heat_pump": 17 }, "states_on_eia_average": [ "AR", "CA", "HI", "MA", "NV", "NH", "NM", "RI", "UT" ] }, "propane_states": 38 }, "payback_grid": { "yearly_saving_usd": [ 50, 100, 150, 200, 300, 400, 600 ], "extra_cost_usd": [ 500, 1000, 1500, 2000, 3000, 4000 ], "years": [ [ 10.0, 5.0, 3.3, 2.5, 1.7, 1.3, 0.8 ], [ 20.0, 10.0, 6.7, 5.0, 3.3, 2.5, 1.7 ], [ 30.0, 15.0, 10.0, 7.5, 5.0, 3.8, 2.5 ], [ 40.0, 20.0, 13.3, 10.0, 6.7, 5.0, 3.3 ], [ 60.0, 30.0, 20.0, 15.0, 10.0, 7.5, 5.0 ], [ 80.0, 40.0, 26.7, 20.0, 13.3, 10.0, 6.7 ] ] } }