Heat Pump vs Gas Furnace: The Fundamentals
A gas furnace burns natural gas to produce heat. It is simple, reliable, and has been the standard in American homes for decades. A heat pump moves heat from outdoor air into your home using electricity — it is essentially an air conditioner that runs in reverse.
The key metric for heat pumps is COP (Coefficient of Performance). A COP of 3 means the heat pump delivers 3 units of heat for every 1 unit of electricity consumed. In mild climates, COPs of 3-5 are common, making heat pumps 3-5x more efficient than electric resistance heating.
Use our Heat Pump Savings Calculator to compare costs for your specific home and climate.
Installation and Operating Costs
Gas furnace installation: $3,000-6,000 for the unit and installation. Annual operating cost: $600-1,200 depending on climate and gas prices.
Air-source heat pump installation: $4,000-8,000 for a standard system, $8,000-15,000 for a cold-climate heat pump. Annual operating cost: $400-900 depending on climate and electricity rates.
The critical factor is your local climate. In mild climates (Southeast, Pacific Northwest), heat pumps are dramatically cheaper to operate. In extreme cold (Northern Midwest, Alaska), gas furnaces still have an edge because heat pump efficiency drops below 30F.
Federal 25C Tax Credit for Heat Pumps
The Inflation Reduction Act provides a 30% tax credit (up to $2,000) for qualifying heat pump installations through 2032. This significantly reduces the installation cost gap between heat pumps and gas furnaces.
For a $7,000 heat pump installation, the 25C credit provides $2,100 back, reducing your net cost to $4,900 — often less than a new gas furnace installation. Combined with lower operating costs, the payback period is typically 3-5 years.
When Gas Furnaces Still Make Sense
Gas furnaces remain the better choice in specific situations:
Extreme cold climates: If you regularly experience temperatures below -10F, a gas furnace provides more consistent heat. Modern cold-climate heat pumps work down to -15F but at reduced efficiency.
Existing gas infrastructure: If you already have gas lines and a working furnace, the marginal cost of a new gas furnace is lower than switching to a heat pump.
Very high electricity rates: If your electricity costs more than $0.25/kWh and gas is cheap, gas heating can be more economical.
- Heat pumps are 3-5x more efficient than gas in mild climates
- Federal 25C tax credit provides up to $2,000 for heat pumps
- Gas furnaces still win in extreme cold and high-electricity areas
- Heat pump payback period is typically 3-5 years with incentives
Frequently Asked Questions
Do heat pumps work in cold climates?
Modern cold-climate heat pumps work efficiently down to -15F. However, their COP drops as temperatures decrease. In areas with regular sub-zero temperatures, a backup heating source (gas furnace or electric resistance) is recommended.
How much can I save with a heat pump vs gas furnace?
In mild climates, heat pumps save $200-600/year on heating costs. In cold climates, savings are smaller ($100-300/year) but the federal 25C tax credit ($2,000) helps offset the higher installation cost.
What is COP and why does it matter?
COP (Coefficient of Performance) measures heat pump efficiency. A COP of 3 means 3 units of heat output per 1 unit of electricity input. Higher COP = lower operating costs. Modern heat pumps achieve COPs of 3-5 in mild weather.