Heat Pump vs. Gas Furnace ROI Calculator

Compare the true cost of switching to a heat pump versus keeping your current heating system. Enter your home size, current fuel type, and annual heating costs — the calculator sizes the equipment for your climate zone, applies the federal 25C tax credit, and shows your payback period and 15-year lifetime savings.

Total conditioned square footage of your home.

Your total yearly spending on heating fuel. Check last year's utility bills.

Your local electricity rate in cents per kilowatt-hour. Auto-filled from your state average.

How This Calculator Works

Heat Pump Sizing

Equipment size is calculated using IECC climate zone heating load guidelines: 30 BTU/hr per square foot in warm zones (1–3), 40 BTU/hr per sq ft in moderate zones (4–5), and 50 BTU/hr per sq ft in cold zones (6–7). The raw load is rounded to the nearest 6,000 BTU — a standard equipment increment — and converted to tons (1 ton = 12,000 BTU/hr). These are rule-of-thumb estimates; a Manual J load calculation by a licensed HVAC contractor is the correct method for final equipment selection.

Coefficient of Performance by Climate Zone

A heat pump's efficiency is measured by its coefficient of performance (COP) — units of heat output per unit of electricity input. COP varies with outdoor temperature: the colder it is outside, the harder the heat pump works. This calculator uses climate-zone-average COPs derived from published field performance data: 3.5 for zones 1–3 (mild climates), 2.8 for zones 4–5 (moderate), and 2.2 for zones 6–7 (cold climates, assuming a cold-climate heat pump). These are seasonal averages across the full heating season.

Cold-Climate Heat Pumps

Homes in IECC climate zones 5 and above (most of the northern US) require a cold-climate heat pump (CCHP). Standard heat pumps are rated for operation down to about 17°F and lose significant capacity in severe cold. Cold-climate models maintain heating output to -15°F using enhanced compressor technology. CCHPs cost approximately $1,100 per ton installed versus $800 per ton for standard models. If your ZIP code falls in a cold-climate zone, the calculator automatically uses CCHP assumptions and flags this in the results.

Federal 25C Tax Credit Details

The Inflation Reduction Act expanded the Section 25C Energy Efficient Home Improvement Credit. For heat pumps, the credit is 30% of installed cost, up to $2,000 per year. The equipment must meet CEE Tier 1 efficiency requirements. The $2,000 cap applies separately from the $1,200 cap for other improvements (insulation, windows, etc.), so a homeowner can claim both in the same year. The credit is not refundable — you must have a federal tax liability. See IRS Form 5695 and consult a tax professional.

Frequently Asked Questions

What is a heat pump and how does it heat my home? ⌄

A heat pump is an electric appliance that moves heat rather than generating it by burning fuel. In heating mode, it extracts heat energy from outdoor air — even air as cold as -15°F contains heat energy — and pumps it inside your home. Because it moves heat rather than creates it, a heat pump delivers 2 to 3.5 units of heat for every unit of electricity consumed. This ratio is called the coefficient of performance (COP). A COP of 3.0 means the heat pump is 300% efficient — three times more effective than electric resistance heating (which is 100% efficient by definition).

What is the federal heat pump tax credit? ⌄

The federal Energy Efficient Home Improvement Credit (Section 25C) lets you claim 30% of your heat pump's installed cost, up to $2,000, directly against your federal income taxes. The credit is available annually — you can claim it again if you install additional qualifying equipment in a future year. The heat pump must meet efficiency standards set by the Consortium for Energy Efficiency (CEE). You need a federal tax liability to benefit; it is not refundable. See IRS guidance and consult a tax professional.

Do heat pumps work in cold climates? ⌄

Yes — modern cold-climate heat pumps (CCHPs) are specifically designed for northern climates and can maintain heating output down to -15°F. Brands like Mitsubishi, Bosch, Daikin, and others offer CCHP models. Standard heat pumps are designed for operation above about 17°F and lose meaningful capacity in severe cold. If you live in a climate zone 5 or colder (Pennsylvania, Ohio, the upper Midwest, New England, the mountain West), this calculator automatically selects cold-climate assumptions and flags it in the results. A CCHP typically costs 30–40% more per ton than a standard model, but performs reliably year-round without an auxiliary electric resistance backup running constantly.

How long does a heat pump last? ⌄

A well-maintained heat pump typically lasts 15 to 20 years. Gas furnaces have a similar lifespan. The outdoor compressor unit is the main wear component — it runs year-round for both heating and cooling, unlike a furnace that only runs in winter. Annual maintenance (cleaning coils, checking refrigerant charge, replacing air filters) significantly extends equipment life. This calculator uses 15 years for lifetime cost comparisons, which is the lower bound of expected service life for both systems and a conservative basis for comparison.

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