Heat Pump Savings Calculator

A heat pump does not generate heat — it moves heat from outside air into your home, achieving efficiencies of 200–400% (HSPF 9 means 9 BTU of heat delivered per 1 watt-hour of electricity). A gas furnace, even at 98% AFUE, is capped at 100% efficiency. When electricity costs less than the equivalent gas energy, heat pumps win. At $0.16/kWh electricity and $1.50/therm gas, savings are modest; at $3.00/therm gas, a heat pump can save $600–$1,500/year depending on home size and climate.

Modern cold-climate heat pumps (rated for HSPF2 ≥8.5) operate efficiently down to -13°F (-25°C). ENERGY STAR–certified cold-climate models maintain 70–100% of their rated capacity at 5°F. However, in ASHRAE climate zones 1 and 2 (Florida, South Texas, Hawaii), heating needs are minimal — savings will be modest because you heat so rarely. The biggest savings come from zones 4–7 (Pacific Northwest, Midwest, Northeast), where gas and oil heating costs are highest.

HSPF (Heating Seasonal Performance Factor) measures annual heating efficiency in BTU per watt-hour. HSPF2 is the current standard (adopted 2023) and tests under harsher conditions than the old HSPF metric. A heat pump rated HSPF2 9.0 delivers about 9 BTU of useful heat per watt-hour — equivalent to a gas furnace with 264% AFUE at $0.16/kWh vs $1.50/therm. Minimum federal standard is HSPF2 7.5; ENERGY STAR requires ≥8.2; cold-climate models reach 10+.

A typical ducted heat pump system (replacing a gas furnace) costs $4,000–$8,000 installed for a whole-home system. Mini-split (ductless) systems run $1,500–$4,000 per zone. Installation costs vary significantly by region, contractor, and whether duct modifications are needed. Note: The Federal Section 25C tax credit expired December 31, 2025, so it is no longer available for 2026+ installations. Some states (Massachusetts, Colorado, Minnesota) still offer rebates of $500–$3,000.

If you currently heat with electric resistance baseboard heaters or an electric furnace, switching to a heat pump is the highest-value upgrade available. Electric resistance has COP = 1.0 (100% efficient); a heat pump with HSPF2 9 has COP ≈ 2.6 at typical winter temperatures, cutting your electric heating bill by 50–70%. With electric resistance costing $1,500–$3,000/year for a 2,000 sqft home in a cold climate, a heat pump typically pays back in 3–6 years.

SEER (Seasonal Energy Efficiency Ratio) measures cooling efficiency — a SEER 18 unit produces 18 BTU of cooling per watt-hour of electricity. HSPF (Heating Seasonal Performance Factor) measures heating efficiency in the same BTU/watt-hour units. Since 2023, the updated SEER2 and HSPF2 standards test under more realistic external static pressure and run about 4–5% lower than the old values for the same equipment. Federal minimums are SEER2 14 (North) or 15 (South) for cooling and HSPF2 7.5 for heating. ENERGY STAR requires SEER2 ≥15 and HSPF2 ≥8.2 — both ratings matter because a heat pump runs year-round.

The Federal Section 25C Energy Efficient Home Improvement Credit, which covered qualifying heat pumps for up to $2,000 per year, expired on December 31, 2025. For installations placed in service in 2026 and later, Section 25C applies $0 — it is no longer available. Some state and utility programs still offer rebates: Massachusetts Mass Save offers up to $10,000, New York NYS Clean Heat $1,500–$3,000, and Colorado state credits up to $1,500. Eligibility rules vary widely; consult a licensed CPA or tax professional and your state energy office before counting on any specific incentive.

Not always — there are three common approaches. A ducted air-source heat pump replaces both your furnace and central AC condenser with a single system, typically reusing your existing ductwork. A ductless mini-split skips ducts entirely and installs wall-mounted indoor heads in 1–4 zones — ideal for homes without ducts or for additions. A dual-fuel hybrid keeps your existing gas furnace as backup and adds a heat pump for primary heating, switching to gas only on the coldest days. The right option depends on your home, ducting condition, and climate zone; consult a licensed HVAC contractor for a Manual J load calculation before sizing.

A properly installed and maintained air-source heat pump typically lasts 15–20 years. Ground-source (geothermal) units last 25+ years for indoor components and 50+ years for the ground loop. Routine maintenance is straightforward: replace the indoor air filter every 1–3 months, keep the outdoor unit clear of leaves and snow, and schedule an annual professional tune-up ($100–$200) to check refrigerant charge, blower performance, and electrical connections. Skipping maintenance can reduce efficiency by 5–15% and shorten lifespan. For warranty-covered repairs, follow the manufacturer schedule and keep records.

Yes — your electricity bill will go up because the heat pump now does work previously handled by gas, oil, or propane. The right question is whether your total combined energy bill (electric + gas) goes down. For homes replacing oil or propane, the new electric cost is almost always less than the old fuel cost. For homes replacing natural gas, the math depends on local gas vs. electric rates: at $0.16/kWh electricity and $1.50/therm gas, savings are modest; at $0.16/kWh and $3.00/therm (Northeast, Mountain West), heat pumps save $500–$1,500/year. Use this calculator with your local rates to see the net effect.