Furnace vs Boiler in St. Louis County, Minnesota
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. It ties into the ducts you have, and with winter nights here averaging 1°F and heat needed most of the year, you want a system that can push warm air fast. Most homes in this region are set up this way already.
When a boiler makes sense
If your home heats through radiators or in-floor pipes rather than ducts, a boiler is the one that fits without tearing into your walls. It runs about 5% cheaper here than a furnace, which adds up over the roughly 10 months a year you'll be running it. It suits a house built around that kind of heat, not one that would need the pipes added in.
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. It ties into the ducts you have, and with winter nights here averaging 1°F and heat needed most of the year, you want a system that can push warm air fast. Most homes in this region are set up this way already.
When a boiler makes sense
If your home heats through radiators or in-floor pipes rather than ducts, a boiler is the one that fits without tearing into your walls. It runs about 5% cheaper here than a furnace, which adds up over the roughly 10 months a year you'll be running it. It suits a house built around that kind of heat, not one that would need the pipes added in.
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 St. Louis County.
In the Plains states, 77.6% of homes heat with a furnace, so most 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 Plains states that heat with one | 77.6% | 6.5% |
| Handles a 1°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 ductwork, a furnace is the straightforward choice. It ties into the ducts you have, and with winter nights here averaging 1°F and heat needed most of the year, you want a system that can push warm air fast. Most homes in this region are set up this way already.
When a boiler makes sense
If your home heats through radiators or in-floor pipes rather than ducts, a boiler is the one that fits without tearing into your walls. It runs about 5% cheaper here than a furnace, which adds up over the roughly 10 months a year you'll be running it. It suits a house built around that kind of heat, not one that would need the pipes added in.
A St. Louis County contractor will price both against your own house, your ductwork and your panel.
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