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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St. Michael homeowners replacing a furnace pay $4,500–$9,500 installed with us: roughly $4,500–$6,000 at 80% AFUE or $6,500–$9,500 at 96–98% AFUE. The quote is flat-rate, in writing and sized by Manual J. For the two-stories that make up most of the city, a two-stage or variable-speed furnace is worth pricing.
Replacing a St. Michael builder furnace is mostly a condensing-for-condensing swap, and the job turns on details. Whether the existing PVC meets the new furnace's pipe size and length limits takes measuring. The one-thermostat, one-blower setup that leaves the upstairs hot and the main floor cool is the thing a new furnace can help most, because a two-stage or variable-speed model runs long, low cycles that mix the floors. If the house has separate supply branches for each floor, zoning can go in with the furnace.
Your gas utility decides the rebate. CenterPoint Energy serves most of the city and lets you use the dealer of your choice; Xcel Energy serves some areas and runs its own heating equipment rebates, some of which require a participating contractor. Electric service is mostly Xcel Energy with Wright-Hennepin serving the rest, which matters for a dual-fuel heat pump. Walkout lower levels need a condensate route that won't flood new flooring. We pull the permit.
Updated September 23, 2026
An installed furnace from us runs about $4,500–$9,500 in Saint Michael: 80% AFUE roughly $4,500–$6,000, 96–98% AFUE roughly $6,500–$9,500. Same prices in Saint Michael as in every town we serve. See the furnace replacement cost guide.
Start with your bills in St. Michael. Most of the city buys electricity from Xcel Energy, which offers heat pump and cooling rebates, often through a Trade Partner Network contractor, and the rest is on Wright-Hennepin, which lists air-source heat pump rebates and a heat pump tune-up rebate credited on the bill. Gas comes from CenterPoint Energy, whose heating rebates let you use any dealer, or in some areas from Xcel Energy, whose gas furnace rebate points to a participating contractor. Rebate programs change every year, so check the utility's current terms before you buy.
Our guides: Xcel and CenterPoint rebates, heat pump rebates.

More detail on our furnace installation page.
Whichever sends your gas bill. Most of St. Michael gets gas from CenterPoint Energy, whose heating rebates let you pick any dealer and require the application in the same calendar year as the install. Some areas are served by Xcel Energy, whose rebate pages point to participating contractors, so ask before you count on that one. Propane homes on the rural edges aren't covered by either utility's gas rebate.
Usually. A variable-speed furnace runs its blower slowly for long stretches, which keeps air moving between floors and narrows the gap between a hot upstairs and a cool main floor. It's quieter, and the ECM blower uses less electricity than older motors. It costs more than single-stage, and it doesn't replace missing returns upstairs. In a house with one thermostat serving two floors, it's often the best value upgrade.
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.
Read the guideBang at startup, squeal, scrape, rattle, hum, click, whistle or a rumble after shutoff: what each furnace noise means and whether it's safe to keep running.
Read the guideA furnace that turns on and off too often tells you what's wrong by how long it runs. How to time a cycle, and what seconds, minutes and frequent cycles mean.
Read the guideFurnace replacement in Saint Michael? Call or send a request.