Furnace vs Boiler in Bexar County, Texas
When a furnace makes sense
A furnace makes sense if your ductwork is already in place and working, since it can use what's there to move warm air through the house. Winters here are mild, with nighttime lows around 43°F and only about five months where you need heat at all, so you're not asking the system to work hard for long. That short season is where the furnace's lower upfront cost matters most, since you have less time each year to make up any difference in running cost.
When a boiler makes sense
A boiler is worth a look if you want even heat without relying on ducts, or if your house already has radiators or in-floor piping. It runs about 5% cheaper to operate than a furnace at Texas gas prices, and with only five months of heating season, that gap in running cost has less time to add up. If your home doesn't have any ductwork now, that's the bigger factor to weigh against the modest savings.
When a furnace makes sense
A furnace makes sense if your ductwork is already in place and working, since it can use what's there to move warm air through the house. Winters here are mild, with nighttime lows around 43°F and only about five months where you need heat at all, so you're not asking the system to work hard for long. That short season is where the furnace's lower upfront cost matters most, since you have less time each year to make up any difference in running cost.
When a boiler makes sense
A boiler is worth a look if you want even heat without relying on ducts, or if your house already has radiators or in-floor piping. It runs about 5% cheaper to operate than a furnace at Texas gas prices, and with only five months of heating season, that gap in running cost has less time to add up. If your home doesn't have any ductwork now, that's the bigger factor to weigh against the modest savings.
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 Bexar County.
Most homes here were built around 1990 with ductwork already in place, and that setup favors a furnace over adding a boiler's pipes and radiators.
If your home already has radiators or in-floor piping instead of ductwork, a boiler still makes more sense than adding a furnace and ducts from scratch.
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 |
| Handles a 43°F night | Yes | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a furnace makes sense
A furnace makes sense if your ductwork is already in place and working, since it can use what's there to move warm air through the house. Winters here are mild, with nighttime lows around 43°F and only about five months where you need heat at all, so you're not asking the system to work hard for long. That short season is where the furnace's lower upfront cost matters most, since you have less time each year to make up any difference in running cost.
When a boiler makes sense
A boiler is worth a look if you want even heat without relying on ducts, or if your house already has radiators or in-floor piping. It runs about 5% cheaper to operate than a furnace at Texas gas prices, and with only five months of heating season, that gap in running cost has less time to add up. If your home doesn't have any ductwork now, that's the bigger factor to weigh against the modest savings.
A Bexar County contractor will price both against your own house, your ductwork and your panel.
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