An unfinished basement featuring concrete block walls, exposed floor joists, a bare concrete floor, and a forced-air furnace with a large metal exhaust duct in the corner.

Furnace vs Boiler in Union County, South Dakota

When a furnace makes sense

If your house already has ductwork, a furnace is the straightforward choice. It ties into what's already there, and that's the setup most homes in this region use. Winters here average 13°F, and a furnace is built to push hard against that kind of cold for the eight months a year you'll need it.

When a boiler makes sense

A boiler makes sense if your home heats through radiators or in-floor pipes rather than ducts. It runs about 5% cheaper here than a furnace, which adds up over eight months of heating a year. It's the less common setup in this region, so weigh that against what your house already has in place.

When a furnace makes sense

If your house already has ductwork, a furnace is the straightforward choice. It ties into what's already there, and that's the setup most homes in this region use. Winters here average 13°F, and a furnace is built to push hard against that kind of cold for the eight months a year you'll need it.

When a boiler makes sense

A boiler makes sense if your home heats through radiators or in-floor pipes rather than ducts. It runs about 5% cheaper here than a furnace, which adds up over eight months of heating a year. It's the less common setup in this region, so weigh that against what your house already has in place.

An unfinished concrete basement containing a gas furnace with sheet-metal ductwork, utility shelving, and exposed overhead joists.

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

A gray boiler with copper and black iron pipe connections stands against a concrete basement wall, with a water heater and storage shelving visible in the background.

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 Union County.

In the Plains states, 77.6% of homes heat with a furnace, so most already have the ductwork it needs.

About 5% lessto heat with a boiler than with a furnace, at South Dakota prices
13°Faverage winter low
51%of homes here heat with gas

If your home already has radiators or in-floor pipes instead of ductwork, a boiler still makes more sense than adding ducts for a furnace.

Find a contractor
Compared onFurnaceBoiler
Cost to run hereCosts more to runAbout 5% less to run
What it doesHeats onlyHeats only
Homes in the Plains states that heat with one77.6%6.5%
Handles a 13°F nightYesYes

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 what's already there, and that's the setup most homes in this region use. Winters here average 13°F, and a furnace is built to push hard against that kind of cold for the eight months a year you'll need it.

When a boiler makes sense

A boiler makes sense if your home heats through radiators or in-floor pipes rather than ducts. It runs about 5% cheaper here than a furnace, which adds up over eight months of heating a year. It's the less common setup in this region, so weigh that against what your house already has in place.

A Union County contractor will price both against your own house, your ductwork and your panel.

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