Heat pump vs Furnace in San Diego County, California
When a heat pump makes sense
If you want one system that heats and cools instead of running a separate air conditioner, a heat pump does both. Winter nights here average 41°F, mild enough that a heat pump is not fighting the deep cold that a standard model struggles with. It still runs on electricity, and at California's prices gas heat costs at least 45% less to run, so expect a higher monthly cost through the roughly six months a year you need heat.
When a furnace makes sense
If keeping your heating bill down matters most, a furnace is the cheaper machine to run here, by at least 45% against a heat pump at current gas and electric prices. It only heats, so you would still need a separate air conditioner for summer. That is the setup most of this county already has, with 54% of homes heating with gas.
When a heat pump makes sense
If you want one system that heats and cools instead of running a separate air conditioner, a heat pump does both. Winter nights here average 41°F, mild enough that a heat pump is not fighting the deep cold that a standard model struggles with. It still runs on electricity, and at California's prices gas heat costs at least 45% less to run, so expect a higher monthly cost through the roughly six months a year you need heat.
When a furnace makes sense
If keeping your heating bill down matters most, a furnace is the cheaper machine to run here, by at least 45% against a heat pump at current gas and electric prices. It only heats, so you would still need a separate air conditioner for summer. That is the setup most of this county already has, with 54% of homes heating with gas.
Heat pump
- Runs on
- Electricity
- What it does
- Heats and cools
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Furnace
- Runs on
- Natural gas
- What it does
- Heats only
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Furnace wins in San Diego County.
Gas costs at least 45% less than running a heat pump here, and most homes in the county already heat with gas.
If your home has no gas line to work with, a heat pump is still worth having, since it covers both heating and cooling without one.
Find a contractor| Compared on | Heat pump | Furnace |
|---|---|---|
| Cost to run here | Costs more to run | At least 45% less to run |
| What it does | Heats and cools | Heats only |
| Homes in the Pacific states that heat with one | 4.8% | 56.9% |
| Handles a 41°F night | Standard models lose heating power in the cold; cold-climate models are built for it | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a heat pump makes sense
If you want one system that heats and cools instead of running a separate air conditioner, a heat pump does both. Winter nights here average 41°F, mild enough that a heat pump is not fighting the deep cold that a standard model struggles with. It still runs on electricity, and at California's prices gas heat costs at least 45% less to run, so expect a higher monthly cost through the roughly six months a year you need heat.
When a furnace makes sense
If keeping your heating bill down matters most, a furnace is the cheaper machine to run here, by at least 45% against a heat pump at current gas and electric prices. It only heats, so you would still need a separate air conditioner for summer. That is the setup most of this county already has, with 54% of homes heating with gas.
A San Diego County contractor will price both against your own house, your ductwork and your panel.
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