How Long Does a Furnace Replacement Take?
Most furnace replacements take one day; venting, a chimney liner, gas line or duct work can add a second. Ours run $4,500–$9,500 installed. Call 612-429-3465.
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Furnace Replacement in Stillwater, MN
Furnace replacement in Stillwater costs $4,500–$9,500 installed, written flat-rate, for 1800s hill houses and newer Croixwood homes. An 80% model runs roughly $4,500–$6,000 and a 96–98% one $6,500–$9,500. On a designated historic house, vent exits may need Heritage Preservation Commission review.
Furnace replacements 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. A mechanical permit from the city is normally required for the swap.
Updated November 10, 2026
What affects the price of a new furnace in Stillwater?
What moves the quote in Stillwater: venting changes on a switch to a condensing furnace, a liner for a water heater left alone in the chimney, and ductwork and returns. 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. Ask us which rebates apply when we quote. Rebate programs change every year, so check the utility's current terms before you buy.
Our guides: Xcel and CenterPoint rebates, heat pump rebates.
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
Signs your furnace needs replacing
- Furnace repair in Stillwater
- AC repair in Stillwater
- AC replacement in Stillwater
- Heat pumps in Stillwater
- Mini-splits in Stillwater
- Boiler service in Stillwater
- Tune-ups in Stillwater
- All HVAC service in Stillwater
Furnace replacement near Stillwater
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Brands we install and service
Guides on furnace replacement
How Old Is My Furnace or AC? Find the Date on the Data Plate
Find your furnace or AC's age on the data plate, then the install sticker or permit record. Serial decoder charts disagree by brand. Call 612-429-3465.
Read the guideWhat Is a Furnace Inducer Motor? Signs It's Failing
The inducer motor is the small fan that starts first and pushes exhaust out the vent. Noises and codes of a failing one, repair vs replace, and cost.
Read the guideContact Us
Heat out? AC quit? Call or send a request.