Furnace vs Boiler in Snohomish County, Washington
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice, since those same ducts can carry cooling later if you ever add it. A boiler can't do that. With winter nights here averaging 30°F and heat needed about 10 months of the year, you want equipment matched to the ducts you already have.
When a boiler makes sense
If your home heats through radiators or in-floor pipes rather than ducts, a boiler is the natural fit, since running new ductwork just to install a furnace is a much bigger job. It also costs about 5% less to run here than a furnace at Washington gas prices, which adds up over a 10-month heating season. The tradeoff is that a boiler only heats, so it won't give you a path to central cooling down the road.
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice, since those same ducts can carry cooling later if you ever add it. A boiler can't do that. With winter nights here averaging 30°F and heat needed about 10 months of the year, you want equipment matched to the ducts you already have.
When a boiler makes sense
If your home heats through radiators or in-floor pipes rather than ducts, a boiler is the natural fit, since running new ductwork just to install a furnace is a much bigger job. It also costs about 5% less to run here than a furnace at Washington gas prices, which adds up over a 10-month heating season. The tradeoff is that a boiler only heats, so it won't give you a path to central cooling down the road.
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 Snohomish 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 30°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, since those same ducts can carry cooling later if you ever add it. A boiler can't do that. With winter nights here averaging 30°F and heat needed about 10 months of the year, you want equipment matched to the ducts you already have.
When a boiler makes sense
If your home heats through radiators or in-floor pipes rather than ducts, a boiler is the natural fit, since running new ductwork just to install a furnace is a much bigger job. It also costs about 5% less to run here than a furnace at Washington gas prices, which adds up over a 10-month heating season. The tradeoff is that a boiler only heats, so it won't give you a path to central cooling down the road.
A Snohomish County contractor will price both against your own house, your ductwork and your panel.
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