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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An Andover furnace replacement with us runs $4,500–$9,500 installed, whether the house burns CenterPoint gas or propane from a tank. A 96–98% model is roughly $6,500–$9,500 and an 80% model roughly $4,500–$6,000. On Connexus Energy electric, pairing the new furnace with a heat pump can open up the co-op's dual-fuel off-peak rate.
Replacing a furnace in Andover usually means one of three houses. A 1980s split-entry may still vent an 80% furnace into a chimney, and going to 96% means two PVC pipes out the rim joist, a condensate drain, and a liner or new vent for the water heater left behind. A 2000s two-story already has PVC, so the swap is cleaner, though we confirm the pipe length and diameter meet the new furnace's installation manual. An acreage home on propane gets the same condensing furnaces, set up with the manufacturer's LP conversion kit.
The newer houses are built tight, which makes Manual J sizing matter more. CenterPoint Energy serves gas in the subdivisions, and a high-efficiency furnace there can qualify for its heating rebate no matter which contractor installs it. Propane homes aren't CenterPoint customers, so the rebate talk there turns to Connexus Energy's heat pump programs.
Updated September 23, 2026
An installed furnace from us runs about $4,500–$9,500 in Andover: 80% AFUE roughly $4,500–$6,000, 96–98% AFUE roughly $6,500–$9,500. Same prices in Andover as in every town we serve. See the furnace replacement cost guide.
Andover homes buy gas from CenterPoint Energy, whose rebates on high-efficiency furnaces let you use the dealer of your choice as long as the application goes in the same year as the install. Electricity comes from Connexus Energy, which offers rebates on air-source, ductless and ground-source heat pumps and on central air, plus a reduced-rate program for heat pumps paired with a furnace. Ask whether a Connexus heat pump rebate needs a registered contractor. The Connexus programs follow your electric service, so homes heating with propane can use them too. 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.
Usually more so than on natural gas, because propane typically costs more for the same heat, so every point of efficiency saves more. A 96% furnace turns 96% of the fuel into heat, against 80% for an older model, and larger rural houses burn a lot of it. Venting is the same two-pipe PVC as a gas condensing furnace. If the ducts are sound, have us price a heat pump alongside it to cut propane use further.
It turns the furnace into the backup. Under Connexus Energy's off-peak dual-fuel program, the co-op can switch your heating from the heat pump to the furnace during peak demand, and in return the heat pump's electricity is billed at a lower rate. The furnace still has to carry the coldest days, so it's sized for the full load. A two-stage 96% model suits the pairing well. Check current enrollment terms with Connexus.
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 guideThe 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 guideFurnace 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.
Read the guideFurnace replacement in Andover? Call or send a request.