How Long Does a Furnace Replacement Take?
A straight furnace swap is usually done in one day. Venting changes, a chimney liner, gas line or duct work, and the permit inspection add time. What to expect.
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Furnace Replacement in Stillwater, MN
Furnaces we install in Stillwater cost $4,500–$9,500: roughly $4,500–$6,000 for 80% AFUE and $6,500–$9,500 for 96–98%. The written quote is flat-rate and based on a Manual J. On designated historic houses, where the new vent pipes exit may need Heritage Preservation Commission review.
Furnace replacement calls in Stillwater homes
In Stillwater's older houses, a furnace replacement is as much about the chimney as the furnace. Many North Hill and South Hill homes vent into tall masonry chimneys that have lost mortar or were never lined, and a newer 80% furnace's cooler exhaust can condense inside one. Keep an 80% model and the chimney usually needs a liner. Move to a 96–98% condensing furnace and the PVC has to leave through a stone foundation or an exterior wall, where placement matters on a designated historic property.
On the west side, the job is simpler: a builder furnace from the late 1990s or 2000s, usually already on PVC, replaced with a right-sized unit after a Manual J. Xcel Energy is both the gas and electric utility citywide, so its heating equipment rebates are the ones to check; ask Xcel whether they need a participating contractor. We pull the mechanical permit either way.
Updated September 23, 2026
How much does a new furnace cost in Stillwater?
An installed furnace from us runs about $4,500–$9,500 in Stillwater: 80% AFUE roughly $4,500–$6,000, 96–98% AFUE roughly $6,500–$9,500. Same prices in Stillwater as in every town we serve. See the furnace replacement cost guide.
Are there rebates for a new furnace in Stillwater?
Stillwater homes buy gas and electricity from Xcel Energy, which keeps the rebate picture simple. On the North and South Hills, the Xcel rebate that matters most is the one for high-efficiency gas boilers; on the west side it's usually a furnace, central AC or heat pump. Mini-split and cold-climate mini-split heat pumps, a common way to cool radiator homes, have their own Xcel rebates. Some Xcel rebates require a registered contractor, so ask before you choose equipment. Rebate programs change every year, so check the utility's current terms before you buy.
Our guides: Xcel and CenterPoint rebates, heat pump rebates.
Signs it's time to replace your furnace
- A cracked heat exchanger on a furnace that's out of warranty
- The furnace is 20-plus years old and needs another major repair
- Rooms far from the furnace never warm up on sub-zero nights
- Gas bills climbing while your thermostat settings haven't changed
- Repair calls two or more winters in a row
- A burner roar or blower noise you can hear across the house
- Replacement parts for your model are getting hard to find
More detail on our furnace installation page.
Furnace replacement in Stillwater: questions
Can a furnace replace the radiators in a Stillwater house?
It can, but it's a big project. Adding forced air to a radiator house means running ductwork through plaster walls and floors, which most owners would rather avoid. The more common paths are keeping the boiler for heat and adding cooling with small-duct high-velocity or ductless equipment, or replacing the boiler itself. We quote whichever fits the house and explain the tradeoffs in writing.
Why does a Stillwater furnace quote mention combustion air?
Older furnaces in older houses drew combustion air from leaky basements. After new windows and air sealing, an 80% furnace and a water heater sharing a room may not get enough air to burn and vent cleanly. We check the space against the code requirement during the quote. A direct-vent 96–98% furnace brings in its own outside air through a PVC intake, which avoids the problem.
More in Stillwater
- Furnace repair in Stillwater
- AC repair in Stillwater
- AC replacement in Stillwater
- All HVAC service in Stillwater
Furnace replacement near Stillwater
- Oak Park Heights, MN 2 mi
- Bayport, MN 3 mi
- Grant, MN 5 mi
- Hudson, WI 6 mi
- Lake Elmo, MN 6 mi
- Mahtomedi, MN 7 mi
Brands we install and service
Guides on furnace replacement
The Quietest Furnaces for Minnesota Homes, and Why the Ducts Matter as Much
The quietest gas furnaces from Lennox, Carrier and Trane, the features that really cut noise, and the duct fixes that quiet any furnace in a Minnesota home.
Read the guideFrozen Furnace Vent Pipe? How to Clear It Safely in a Minnesota Winter
Furnace quit in a cold snap? How to tell if the PVC intake or exhaust is iced or drifted shut, clear it without cracking the pipe, and keep it from recurring.
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Furnace replacement in Stillwater? Call or send a request.