Short answer
Heat pumps are usually the better value in hot, mixed and mild climates, especially where natural gas isn't available. In very cold regions a cold-climate heat pump or a dual-fuel setup (heat pump plus gas furnace) gives efficiency most of the year with gas backup for the coldest days.
How they differ
A furnace burns gas or propane (or uses electric resistance) to make heat. A heat pump moves existing heat from outdoor air into the house, using electricity, and reverses to cool in summer.
Where heat pumps shine
Across the South, Southwest and West Coast, a heat pump can replace both the AC and furnace.
- Mild winters
- Homes without natural gas
- Replacing electric baseboard, oil or propane
- Homes adding cooling for the first time
Where furnaces still make sense
In very cold climates with cheap natural gas, a high-efficiency furnace remains cost-effective. Many homes pair it with a heat pump, using the heat pump until temperatures drop below a set balance point.
How to decide
Get a load calculation, compare local electricity and gas rates, and check rebates or tax credits. Ask installers to show heat-pump capacity at your area's winter design temperature.
Common questions
What is a dual-fuel system?
A heat pump paired with a gas furnace. The heat pump handles most heating and all cooling; the furnace takes over in very cold weather.
Do heat pumps work below freezing?
Yes. Standard models lose capacity in deep cold, while cold-climate models are designed to keep heating at temperatures well below 0°F.
This guide is general information, not a diagnosis. HVAC systems vary; a licensed technician should inspect yours before repairs.