Furnace vs Boiler in San Diego County, California
When a furnace makes sense
If your house already has ducts, a furnace is the easier path. It runs on natural gas, ties into the ductwork you have, and gets the whole house warm on the cold nights here, when temperatures average 41°F. Winters are short, about six months of the year need heat, so you want a system that heats fast without a lot of setup.
When a boiler makes sense
A boiler makes sense if your home already has radiators or in-floor pipes instead of ducts. It runs about 5% cheaper to operate here than a furnace, and it heats steadily through rooms that were built for that kind of system. Without existing radiators or pipe loops, though, there is nothing for it to connect to.
When a furnace makes sense
If your house already has ducts, a furnace is the easier path. It runs on natural gas, ties into the ductwork you have, and gets the whole house warm on the cold nights here, when temperatures average 41°F. Winters are short, about six months of the year need heat, so you want a system that heats fast without a lot of setup.
When a boiler makes sense
A boiler makes sense if your home already has radiators or in-floor pipes instead of ducts. It runs about 5% cheaper to operate here than a furnace, and it heats steadily through rooms that were built for that kind of system. Without existing radiators or pipe loops, though, there is nothing for it to connect to.
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
Boiler
- 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.
In the Pacific states, 56.9% of homes heat with a furnace, so just over half already have the ductwork it needs.
If your home already has radiators or in-floor pipes instead of ductwork, a boiler is still the better fit.
Find a contractor| Compared on | Furnace | Boiler |
|---|---|---|
| Cost to run here | Costs more to run | About 5% less to run |
| What it does | Heats only | Heats only |
| Homes in the Pacific states that heat with one | 56.9% | 1.6% |
| Handles a 41°F night | Yes | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a furnace makes sense
If your house already has ducts, a furnace is the easier path. It runs on natural gas, ties into the ductwork you have, and gets the whole house warm on the cold nights here, when temperatures average 41°F. Winters are short, about six months of the year need heat, so you want a system that heats fast without a lot of setup.
When a boiler makes sense
A boiler makes sense if your home already has radiators or in-floor pipes instead of ducts. It runs about 5% cheaper to operate here than a furnace, and it heats steadily through rooms that were built for that kind of system. Without existing radiators or pipe loops, though, there is nothing for it to connect to.
A San Diego County contractor will price both against your own house, your ductwork and your panel.
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