96% vs 98% AFUE Furnace: Is the Upgrade Worth It in Minnesota?
What AFUE measures, the gas math from 80% to 96% to 98% using your own bill, and what a 98% furnace really buys you in a cold Minnesota house.
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Furnace Replacement in Forest Lake, MN
We replace furnaces in Forest Lake for $4,500–$9,500 installed, with a written flat-rate quote sized by Manual J. Xcel Energy supplies natural gas in town and in most subdivisions; if your road is due to get gas, we can install a propane furnace that converts to natural gas with the manufacturer's kit.
Furnace replacement calls in Forest Lake homes
Furnace replacement in Forest Lake depends on where the house sits. In town and the newer subdivisions, it's a basement job on Xcel Energy gas: Manual J sizing, PVC venting through the rim joist, a condensate drain and a permit. Xcel's heating equipment rebates cover qualifying high-efficiency furnaces, and some of its programs call for a participating contractor, so ask before choosing an installer.
Lake homes are harder. A cabin winterized piece by piece may have a small furnace in a crawlspace, ducts that never reached the additions and a lot of heat loss through old walls, so the load calculation has to cover the house as it stands now. In a crawlspace, the new furnace and its condensate line need protection from freezing, and the PVC terminations need to clear the snow. On propane acreage, a 96% furnace saves more fuel dollars per season than it would on natural gas, since propane usually costs more per unit of heat.
Updated September 23, 2026
How much does a new furnace cost in Forest Lake?
An installed furnace from us runs about $4,500–$9,500 in Forest Lake: 80% AFUE roughly $4,500–$6,000, 96–98% AFUE roughly $6,500–$9,500. Same prices in Forest Lake as in every town we serve. See the furnace replacement cost guide.
Are there rebates for a new furnace in Forest Lake?
Xcel Energy supplies gas and electricity in Forest Lake where its lines reach. For a home moving off propane, look at Xcel's Make the Switch to Natural Gas program along with its heating equipment rebates for high-efficiency gas furnaces. Xcel's heat pump rebates, which can also help a propane home adding a heat pump, run through its Trade Partner Network, so ask whether the rebate needs a registered contractor. Minnesota's HEAR and HOMES rebates haven't launched. 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 Forest Lake: questions
Can the new furnace go in the attic of our Forest Lake lake cabin?
We'd avoid it. A Minnesota attic drops well below freezing, which puts the condensate line of a 96% furnace at risk and loses heat through any duct leak, and service access is poor. A closet, a utility room or an insulated crawlspace is usually a better home for the furnace, and in a small cabin a ductless heat pump can skip the furnace question entirely. We look at the floor plan before recommending a spot.
Our Forest Lake lake home sits empty part of the winter. Does that change the furnace we should buy?
It changes the controls more than the furnace. A Wi-Fi thermostat that alerts you to low indoor temperatures, or a separate freeze alarm, is worth more in an empty house than a higher efficiency tier. A two-stage furnace is still a good fit, and the condensate path should stay in heated space so it can't freeze while nobody's there. Set a minimum temperature that protects the plumbing, and have the furnace checked before you leave in fall.
More in Forest Lake
- Furnace repair in Forest Lake
- AC repair in Forest Lake
- AC replacement in Forest Lake
- All HVAC service in Forest Lake
Furnace replacement near Forest Lake
- Columbus, MN 5 mi
- Centerville, MN 9 mi
- Hugo, MN 9 mi
- Scandia, MN 9 mi
- Lino Lakes, MN 10 mi
- East Bethel, MN 12 mi
Brands we install and service
Guides on furnace replacement
Trane or Carrier Furnace? A Minnesota Buying Guide for Your Replacement
Trane or Carrier furnace? How the lineups match tier by tier, warranty registration windows, what to check on both quotes and what a Minnesota install adds.
Read the guideHow 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.
Read the guideContact Us
Furnace replacement in Forest Lake? Call or send a request.