{"uid":"cap_pxUFT39B6LMfrUX_DqKwp","slug":"home-energy-calculators-heating-cost-comparison-4ef62072","name":"Home Energy Calculators – Heating Cost Comparison","description":"Cost per million BTU of delivered heat for resistance, heat pump, gas, propane and heating oil furnaces, from your prices.","url":"https://home-energy-calc.x402tookit.com/heating-cost-compare?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"gasAfue":{"type":"number","description":"Gas furnace efficiency 0.5 to 0.99 (default 0.95)"},"oilAfue":{"type":"number","description":"Oil furnace efficiency 0.5 to 0.99 (default 0.85)"},"gasPerTherm":{"type":"number","description":"Natural gas price per therm (1 therm = 100,000 BTU)"},"heatPumpCop":{"type":"number","description":"Seasonal heat pump COP, 1.5 to 6 (default 3)"},"propaneAfue":{"type":"number","description":"Propane furnace efficiency 0.5 to 0.99 (default 0.95)"},"oilPerGallon":{"type":"number","description":"Heating oil price per gallon (137,381 BTU/gal)"},"annualHeatMMBtu":{"type":"number","description":"Yearly heat your home needs in million BTU (see /heat-loss), for yearly cost"},"propanePerGallon":{"type":"number","description":"Propane price per gallon (91,452 BTU/gal)"},"electricityPerKwh":{"type":"number","description":"Electricity price per kWh (gives resistance and heat pump)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"systemsRankedCheapestFirst":{"type":["array","null"],"items":{"type":"object","properties":{"note":{"type":["null","string"]},"system":{"type":["null","string"]},"yearlyCost":{"type":["null","number"]},"assumedEfficiency":{"type":["null","number"]},"relativeToCheapest":{"type":["null","number"]},"costPerMMBtuDelivered":{"type":["null","number"]}}}},"heatPumpBreakEvenElectricityPerKwhVsGas":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_IqjGByXi9uvAR0uZ5RR6j","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates and ranks the cost per million BTU of delivered heat across resistance electric, heat pump, natural gas, propane, and heating oil systems based on user-provided fuel prices and efficiencies.","exampleAgentPrompt":"Compare my heating system options: I pay $0.13 per kWh for electricity, $1.20 per therm for natural gas, $3.80 per gallon for propane, and $4.20 per gallon for heating oil. My heat pump has a COP of 3, gas furnace is 95% efficient, and my home needs 80 MMBtu of heat per year — which system is cheapest?","exampleUseCases":[{"title":"Deciding whether to switch to a heat pump","prompt":"I'm considering replacing my oil furnace with a heat pump. I pay $4.50 per gallon for heating oil and $0.14 per kWh for electricity. My furnace is 85% efficient and a heat pump would have a COP of 2.8. My home needs about 60 MMBtu of heat a year — can you compare the annual costs and tell me if switching makes financial sense?"},{"title":"New home heating system selection","prompt":"I'm building a new home and trying to pick a heating system. I can get natural gas at $1.10 per therm, propane at $3.60 per gallon, or electricity at $0.12 per kWh. Assume standard efficiencies and a 75 MMBtu annual heat load — rank all the options from cheapest to most expensive per million BTU."},{"title":"Budgeting annual heating expenses","prompt":"Can you estimate my yearly heating costs for gas, oil, and a heat pump? I pay $1.30 per therm for gas, $4.00 per gallon for oil, and $0.15 per kWh for electricity. My home needs about 90 MMBtu of heat each year. Use default efficiency ratings and give me the cost breakdown for each system."}],"resultDescription":"Returns a list of heating systems ranked from cheapest to most expensive by cost per million BTU, including each system's assumed efficiency, yearly cost (if annual heat load provided), relative cost compared to the cheapest option, notes, a plain-language summary, a verdict naming the winning system, and any disclaimers or caveats.","failureModes":["Missing all fuel prices returns an empty or all-null systems list","Efficiency values outside 0.5–0.99 AFUE range may be rejected or clamped","Heat pump COP outside 1.5–6 range may produce invalid results","Omitting electricityPerKwh means resistance and heat pump results are excluded","Missing annualHeatMMBtu omits yearly cost figures but still returns per-MMBtu costs"],"whenToPreferThis":"Use this endpoint when the user wants to compare multiple home heating fuel types simultaneously against their local prices, or when they need a ranked cost-per-BTU breakdown across all major heating technologies. Prefer this over manual calculation when efficiency parameters (AFUE, COP) and fuel costs are known. This is especially valuable when a user is deciding whether to upgrade or switch heating systems and wants a clear financial comparison.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:08:05.664Z","isFirstParty":false,"canonicalSlug":"home-energy-calculators-heating-cost-comparison-4ef62072"}