Installed cost · Operating savings · Break-even
Heat Pump Savings Calculator
Combine the installed cash quote with your heating costs and the proposal's annual energy estimate. The calculator subtracts verified incentives and any conventional replacement you would otherwise pay, then shows simple break-even and cumulative project savings.
Quick estimate
Start with a bill and a heat-pump proposal
Estimated simple break-even
9.3 yr$540 annual operating savings after $5,000 net upfront costSee operating-cost sensitivity
Simple break-even uses a flat annual operating-cost difference and the entered net upfront cost. It excludes financing, time value, equipment life, residual value, cooling changes, and unverified incentives. The quick estimate is not an HVAC load calculation or utility forecast.
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How this calculator works
The quick estimate starts with the installed cash quote. It then estimates annual operating savings without requiring per-therm prices, per-kWh prices, or efficiency ratings: subtract a mild-month baseline from a representative cold-month bill, multiply by the number of similar heating months, and compare that amount with the installer's written estimate of annual heat-pump energy cost.
Use the detailed model only when the source numbers are available
A heat pump moves heat instead of creating it through combustion or electric resistance. The detailed mode converts current annual fuel use into kilowatt-hours of useful delivered heat after your entered equipment efficiency.
Seasonal COP matters more than a headline COP
Coefficient of performance is useful heat delivered per unit of electricity consumed. It changes with outdoor temperature, equipment, controls, defrost, distribution, sizing, and backup heat. Use a climate-appropriate seasonal planning value rather than a favorable point rating.
Fuel conversions used
The model uses 29.3001 kWh per natural-gas therm, 26.8 kWh per gallon of propane, 40.26 kWh per gallon of fuel oil, and 1 kWh per kWh of electric resistance use. Current-system efficiency reduces raw fuel energy to useful heat.
Compare incremental cost when replacement is already necessary
If a furnace, boiler, or air conditioner must be replaced now, the relevant heat-pump premium is the heat-pump quote after incentives minus the conventional replacement you would otherwise buy. If the current system still works and replacement is discretionary, enter $0 for avoided replacement cost.
Break-even is a screening result
The simple break-even view holds annual savings flat. It does not automatically include financing interest, time value, equipment life, residual value, cooling changes, incentive timing, or tax effects. Use the operating-cost sensitivity view to see whether the result survives a higher or lower proposal estimate.
If the proposal provides neither annual kWh nor annual operating cost, it does not contain enough information for a reliable savings comparison. Request that estimate instead of accepting a national default.
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Worked example
Suppose the installed quote is $18,000, verified incentives are $4,000, and a conventional replacement would cost $9,000. The incremental upfront cost is $5,000. A $220 heating-only bill for six cold months is $1,320 per year; compared with a $780 heat-pump estimate, annual operating savings are $540.
At flat annual savings, cumulative project value moves from −$5,000 today to about +$400 after ten years. The sensitivity view shows what happens if the proposal's annual energy estimate is 25% lower or higher.
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Questions people ask
Can a heat pump work in a cold climate?
Yes, equipment designed for cold climates can operate at low outdoor temperatures, but capacity, efficiency, controls, backup strategy, and building load must be designed for the location.
What seasonal COP should I use?
Use a value estimated for the specific equipment, climate, supply temperature, distribution, and backup strategy. If you lack one, test several plausible values rather than trusting a single result.
What if I only know my monthly bills?
Use a cold-month heating bill and subtract a mild-month baseline to approximate the heating-only amount. For the other side of the comparison, ask the installer for projected annual heat-pump energy cost. Use detailed mode only when you have annual fuel units and utility rates.
Why does the calculator show negative savings?
A relatively cheap fuel, expensive electricity, high current efficiency, low heat-pump COP, or added maintenance can make estimated heat-pump operating cost higher. The model preserves that result.
Does this include cooling savings?
No. The core comparison isolates space-heating energy. Replacing an old air conditioner could add cooling savings, but that requires separate cooling-use and efficiency inputs.
Should I subtract the cost of a conventional replacement?
Only when that replacement is otherwise necessary now. Subtract the quote for the furnace, boiler, or air conditioner you would actually buy instead. Enter $0 when the heat pump is a discretionary retrofit and the existing equipment does not need replacement.
Does simple break-even include financing?
No. It divides net upfront cash cost by annual operating savings. Loan interest, fees, timing, tax effects, and opportunity cost require a cash-flow analysis beyond simple payback.
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Sources and model basis
The project estimate uses your quote, incentive eligibility, current bills, and proposal amounts. The optional detailed model ties energy conversions and system concepts to official federal sources.
- DOE Energy Saver: Heat Pump SystemsHeat-pump operation, efficiency, and system types
- DOE: Consumer Central Air Conditioners and Heat PumpsFederal efficiency metrics including HSPF2 and SEER2
- EIA energy conversion calculatorsStandard energy units and conversion context