An unfinished basement featuring a grey forced-air furnace with metal ductwork, concrete block walls, exposed wooden joists, and a single hanging bare bulb.

Furnace vs Boiler in Marathon County, Wisconsin

When a furnace makes sense

If your house already has ductwork, a furnace is the straightforward choice. Most homes in this region are set up this way, so the furnace uses what is already there instead of adding a second heating system to the house. With nine months of heating ahead and nights averaging 9°F, you want a system already matched to your home.

When a boiler makes sense

If your home heats through radiators or in-floor pipes instead of ducts, a boiler is the natural fit, and it runs about 5% cheaper here than a furnace does. That gap matters over nine months of heating a year, with winter nights averaging 9°F. It suits a house built around that kind of heat, not one already wired for ducts.

When a furnace makes sense

If your house already has ductwork, a furnace is the straightforward choice. Most homes in this region are set up this way, so the furnace uses what is already there instead of adding a second heating system to the house. With nine months of heating ahead and nights averaging 9°F, you want a system already matched to your home.

When a boiler makes sense

If your home heats through radiators or in-floor pipes instead of ducts, a boiler is the natural fit, and it runs about 5% cheaper here than a furnace does. That gap matters over nine months of heating a year, with winter nights averaging 9°F. It suits a house built around that kind of heat, not one already wired for ducts.

An unfinished basement containing a metal furnace with ductwork, exposed wooden joists on the ceiling, cardboard boxes, a coiled cable, and a single hanging incandescent bulb.

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 residential boiler with brass pipe connections and pressure gauges installed in an unfinished stone-walled basement.

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 Marathon County.

In the Great Lakes states, 78.8% 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 Wisconsin prices
9°Faverage winter low
56%of homes here heat with gas

If your home already has radiators or in-floor pipes instead of ductwork, a boiler is still the better choice.

Find a contractor
Compared onFurnaceBoiler
Cost to run hereCosts more to runAbout 5% less to run
What it doesHeats onlyHeats only
Homes in the Great Lakes states that heat with one78.8%7.7%
Handles a 9°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. Most homes in this region are set up this way, so the furnace uses what is already there instead of adding a second heating system to the house. With nine months of heating ahead and nights averaging 9°F, you want a system already matched to your home.

When a boiler makes sense

If your home heats through radiators or in-floor pipes instead of ducts, a boiler is the natural fit, and it runs about 5% cheaper here than a furnace does. That gap matters over nine months of heating a year, with winter nights averaging 9°F. It suits a house built around that kind of heat, not one already wired for ducts.

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

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