The heat pump COP comparison calculator compares annual heating costs across air-source, ductless mini-split, and ground-source (geothermal) heat pumps — and benchmarks them against gas furnace, oil furnace, and electric resistance heating. Enter your climate zone and current heating costs to find the true payback period for switching.
Home & Climate Details
US avg: 4,500. Chicago: 6,500. Atlanta: 2,800
Heating System Comparison
| System | COP/Efficiency | Annual Heating Cost | vs Current | Install Cost | Payback |
|---|
How to Compare Heat Pump Efficiency and Costs
Switching to a heat pump is one of the most impactful home electrification decisions you can make. This heat pump COP comparison calculator helps you understand the real annual cost difference between heat pump options and your current heating system, plus the honest payback period for the investment.
Understanding COP and HSPF
COP (Coefficient of Performance) tells you how much heat energy you get for each unit of electricity consumed. A gas furnace converts fuel to heat at 80-95% efficiency, but that's still less than COP 1.0 when accounting for fuel cost per BTU vs electricity. Heat pumps move heat instead of creating it — a COP of 3.0 means 3 BTUs of heat delivered per BTU of electricity used. HSPF2 (Heating Seasonal Performance Factor) is the annualized COP rating on the nameplate.
Air-Source vs Mini-Split vs Geothermal
Air-source ducted heat pumps replace traditional HVAC with a single outdoor unit and use existing ductwork. Mini-split (ductless) systems are ideal for homes without ductwork, additions, or zones — they're often the highest-efficiency option. Geothermal (ground-source) heat pumps circulate fluid through underground loops to exchange heat with the stable ground temperature, delivering the most consistent performance year-round but at significantly higher installation cost ($15,000-30,000).
The Climate Factor
Air-source heat pump efficiency drops as temperatures fall. In moderate climates (zones 3-4), even basic air-source heat pumps outperform gas furnaces on operating cost in many markets. In very cold climates (zones 7-8), you need a cold-climate heat pump (rated to -13°F) or geothermal to maintain efficiency when it matters most.
Accounting for Cooling
A critical factor this calculator doesn't fully capture: heat pumps provide both heating AND cooling in a single system. If you currently have a gas furnace plus a separate AC, comparing heat pump cost to gas alone understates the value — you'd need to add your current AC replacement cost to the gas system side for a fair comparison. In practice, this often makes the heat pump ROI significantly better than the pure heating numbers suggest.
FAQ
Is this heat pump COP comparison calculator free?
Yes, completely free with no signup required.
What is COP in a heat pump?
COP (Coefficient of Performance) measures how efficiently a heat pump moves heat. A COP of 3.0 means the heat pump delivers 3 kWh of heat for every 1 kWh of electricity consumed. This is possible because heat pumps move heat rather than create it. Electric resistance heating has COP = 1.0 by definition, so a heat pump with COP 3.0 is 3x more efficient.
What is the typical COP for an air-source heat pump?
Air-source heat pump COP depends heavily on outdoor temperature. At 47°F (8°C), most air-source heat pumps achieve COP 2.5-4.0. At 17°F (-8°C), COP drops to 1.5-2.5. Cold-climate heat pumps (like Mitsubishi Hyper Heat) maintain COP 1.7-2.5 even at -13°F (-25°C), making them viable in northern climates.
Is a heat pump cheaper than a gas furnace to operate?
It depends on your local electricity and gas prices. In areas with cheap electricity (under $0.10/kWh) or expensive gas ($1.50+/therm), heat pumps are usually cheaper. In areas with cheap gas ($0.70/therm) and expensive electricity ($0.25/kWh), gas furnaces may still win on operating cost — though heat pumps also provide cooling, replacing AC at no extra operating cost.
What is ground-source vs air-source heat pump efficiency?
Ground-source (geothermal) heat pumps maintain COP 3.5-5.0 year-round because ground temperature stays stable (45-55°F year-round in most US locations). Air-source systems have variable COP depending on outdoor temperature. Geothermal costs much more to install ($15,000-30,000) but delivers more consistent efficiency in extreme climates.
What HSPF rating should I look for in a heat pump?
HSPF2 (Heating Seasonal Performance Factor) is the seasonal efficiency rating for heat pumps. The minimum standard is HSPF2 7.5. Efficient units are 8.0-9.0. High-efficiency cold-climate units reach HSPF2 10-12+. Higher HSPF2 means lower heating bills. An HSPF2 of 7.5 equals roughly COP 2.2 in typical heating conditions.