Heat Pump vs AC Cost Comparison Calculator
Compare the annual cooling (and heating) operating costs between a heat pump and a traditional central air conditioner based on your home size, usage hours, local electricity rate, and equipment efficiency ratings.
Typical: 12,000 BTU per 500 sq ft. A 1,500 sq ft home ≈ 36,000 BTU/hr.
Hours per year the system runs in cooling mode. Warm climates: 1,500–3,000 hrs; mild: 500–1,200 hrs.
Set to 0 if comparing cooling-only. Heat pump can provide heating; traditional AC cannot.
Hours per year the heat pump runs in heating mode. Set to 0 for cooling-only comparison.
Seasonal Energy Efficiency Ratio. Federal minimum is 14 SEER (South) / 13 SEER (North). Higher = more efficient.
Modern heat pumps typically range 15–25 SEER. ENERGY STAR requires ≥ 15 SEER.
Heating Seasonal Performance Factor. Federal minimum is 8.2 HSPF2 (≈ 10 HSPF). Higher = more efficient.
U.S. average ≈ $0.13/kWh (2024). Check your utility bill for your exact rate.
Formulas Used
Annual Cooling Energy (kWh):
kWh_cooling = (Cooling Load [BTU/hr] × Annual Cooling Hours) / (SEER × 1,000)
SEER (Seasonal Energy Efficiency Ratio) is defined as total BTU of cooling output divided by total watt-hours of electrical input over a season. Dividing by 1,000 converts Wh → kWh.
Annual Heating Energy — Heat Pump (kWh):
kWh_heating = (Heating Load [BTU/hr] × Annual Heating Hours) / (HSPF × 1,000)
HSPF (Heating Seasonal Performance Factor) is the heating-season equivalent of SEER: total BTU of heat delivered divided by total watt-hours consumed.
Annual Operating Cost ($):
Cost = kWh × Electricity Rate ($/kWh)
Cooling Savings:
Savings = AC Cooling Cost − Heat Pump Cooling Cost
Assumptions & References
- SEER and HSPF ratings are nameplate (rated) values; real-world performance may vary ±10–15% depending on installation quality, duct leakage, and climate.
- The traditional AC scenario excludes heating costs because a central AC unit provides no heating. To compare total HVAC costs, add your furnace/boiler fuel cost separately.
- Cooling load is assumed constant at the entered BTU/hr for all cooling hours (a simplification; actual load varies with outdoor temperature).
- U.S. average residential electricity rate ≈ $0.13/kWh (EIA, 2024). Rates vary widely by state ($0.09–$0.35/kWh).
- Federal minimum efficiency standards (2023): 14 SEER for central AC (South), 13 SEER (North); 8.2 HSPF2 for heat pumps (≈ 10 HSPF legacy scale).
- ENERGY STAR certified heat pumps require ≥ 15 SEER and ≥ 8.5 HSPF. (energystar.gov)
- SEER2 and HSPF2 (new 2023 DOE test procedure) are approximately 5% lower than legacy SEER/HSPF values. This calculator uses legacy SEER/HSPF for broad compatibility.
- Formula source: ASHRAE Handbook — HVAC Systems and Equipment; DOE SEER/HSPF definitions (10 CFR Part 430).