What Size Furnace Do I Need for a Minnesota House?
Furnace size comes from a Manual J heat loss at a -15°F design day, not square feet. Input vs output BTU, AFUE, why old furnaces run big and what to ask for.
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Heating & Cooling in Mendota Heights, MN
Mendota Heights adopted a land use plan in 1959 meant to keep its neighborhoods semi-rural, and it still looks the part: wooded lots, three golf courses and bluffs above the meeting of the Minnesota and Mississippi rivers.
HVAC service in Mendota Heights, MN
We repair and replace furnaces, air conditioners, heat pumps, boilers and ductless mini-splits in Mendota Heights and across Dakota County. Every visit starts with a $79 trip charge and a written price before any work, and the $79 is waived when you go ahead with the repair.
- County
- Dakota County
- ZIP codes
- 55118, 55120
- Natural gas
- Xcel Energy
- Electric
- Xcel Energy
- From downtown Minneapolis
- about 9 miles
Updated September 26, 2026
What HVAC problems do we see most in Mendota Heights?
- Second-round furnace and AC replacements in houses from the 1980s and 90s building peak
- Condensate routing and neutralizers for high-efficiency furnaces on private septic systems
- Condenser placement and coil cleaning on heavily wooded lots
- Combustion-air and draft checks in houses tightened by the airport sound insulation program
Around town: Oheyawahe (Pilot Knob) · Mendota Bridge · Rogers Lake · Mendota Heights Par 3 · Somerset Country Club. Neighborhoods: Friendly Hills
Book in Mendota HeightsWhat are Mendota Heights homes like to heat and cool?
Mendota Heights was truck-farm and dairy country until its population jumped after World War II. The village incorporated in 1956, adopted one of the metro's first land use plans in 1959, and became a city in 1974. The 1940s and 50s houses came first, and neighborhoods platted before 1985 often sit on lots below today's 15,000-square-foot minimum. In the Somerset area south of the country club, about 90 acres of large lots still run on private septic systems, which matters when a high-efficiency furnace needs somewhere to drain.
The 1980s and 90s building peak coincided with airport growth: operations at MSP more than doubled between 1972 and 1998. The Metropolitan Airports Commission bought out one neighborhood near Acacia Cemetery, other homes had their windows and insulation upgraded through the Part 150 sound insulation program, and newer subdivisions were built with extra sound insulation. Those houses hold heat well, but a tight house needs its combustion air and ventilation checked whenever an older furnace or water heater still draws air from the basement.
Winter in Mendota Heights
Age drives a lot of January calls in Mendota Heights. The city's biggest building decade was the 1980s, so a house from that boom may be on a second furnace installed around 2000, and once a furnace passes 20, a long cold snap is when inducers, heat exchangers and control boards tend to give out. On large wooded lots the furnace's PVC vents may exit toward a side or back yard nobody shovels; after a heavy snow, check that both pipes are clear before the furnace locks out.
Summer in Mendota Heights
Tree cover is the big variable in a Mendota Heights cooling load. A house under mature trees can need noticeably less tonnage than the same floor plan on an open lot, which is why a replacement should be sized from a Manual J rather than the old unit's label. The same trees drop seeds and leaves into condensers, so a rinse from the inside out after the spring seed drop is worth doing. Where a house steps down the rolling terrain, the walkout level stays cool and can feel damp.
Which utilities and rebates apply in Mendota Heights?
Mendota Heights is all Xcel Energy for gas and electricity, and the city worked with Xcel's Partners in Energy program on an Energy Action Plan that sends residents to Home Energy Squad visits, free for income-qualified households. For equipment, Xcel's Heating Equipment Rebates are for high-efficiency gas furnaces and point you to a participating contractor, its heat pump rebates are paid through the Trade Partner Network, and Residential Cooling Rebates, Saver's Switch and AC Rewards cover the cooling side.
Rebate programs change every year; check the utility's current terms before you buy. Our guides: Xcel and CenterPoint rebates, heat pump rebates, what happened to the federal credits.
Most-requested in Mendota Heights
Furnace repair in Mendota Heights Mendota Heights homeowners can reach us 7am–9pm every day for furnace repair, with a written flat-rate price before work and the $79 trip charge waived once you approve the repair. Furnace replacement in Mendota Heights Mendota Heights furnace installs are priced flat and in writing at $4,500–$9,500, sized by a Manual J: about $4,500–$6,000 for 80% AFUE and $6,500–$9,500 for 96–98% AFUE. AC repair in Mendota Heights Every day from 7am to 9pm we take AC repair calls in Mendota Heights, starting with a $79 trip charge that's waived when you approve the repair and a written flat-rate price before any work. AC replacement in Mendota Heights A new air conditioner for a Mendota Heights home costs $5,200–$9,800 installed with us, flat-rate and in writing, sized by a Manual J that counts tree shade and the house's current windows and insulation.
All services in Mendota Heights
Mendota Heights HVAC questions
Who repairs furnaces and air conditioners in Mendota Heights, MN?
Central Minnesota Heating and Cooling serves Mendota Heights and the rest of Dakota County, about 9 miles from downtown Minneapolis. We repair and replace furnaces, central air, heat pumps, boilers and ductless mini-splits, and we're open 7 days, 7am–9pm. Call 612-429-3465.
How much does an HVAC service call cost in Mendota Heights?
A flat $79 trip charge, waived when you approve the repair. Written price before any work; same prices in every town we serve. Installed prices are on our pricing page.
Our Mendota Heights house in the Somerset area is on a septic system. Where does a 96% furnace's condensate go?
Into the house drain, so it ends up in the septic tank. A condensing furnace makes several gallons of mildly acidic water a day in cold weather, and the AC coil adds more in summer. We run it to a floor drain or a condensate pump and can add a neutralizer, a cartridge of limestone chips that raises the pH before the water reaches the system. Ask your septic service provider whether they want one.
Is there a Mendota Heights energy program worth using before we replace the furnace?
Yes. The city worked with Xcel Energy's Partners in Energy program on an Energy Action Plan, and one of its steps for residents is a Home Energy Squad visit, where an energy expert assesses the house and can install LED bulbs, a programmable thermostat and weatherstripping. Income-qualified households get the visit free. Tightening the house first can shrink the heating load, and the Manual J for the new furnace will reflect it.
Our Mendota Heights lot is heavily wooded. Where should the air conditioner sit?
Somewhere with open air above it and a couple of feet of clearance on each side, clear of downspouts and, if possible, outside the drip line of a big tree. Shade on the unit makes only a small difference to its efficiency, while seeds and leaves packed into the coil make a large one. Keep it away from bedroom windows and the dryer vent, and on a slope, set the pad level on a compacted base.
Our Mendota Heights house dates from the 1980s building peak. Which parts of the HVAC are likely original?
Usually the ductwork, the refrigerant line set and the gas piping. The furnace and air conditioner have probably been replaced once, and if the current pair dates from around 2000, they're due for a close look. Original line sets were made for R-22 and may be reusable with a new system if they're the right size, flushed clean and pressure-tested. Ducts from that era more often need sealing than replacing.
Also serving near Mendota Heights
- West St. Paul, MN 3 mi
- South St. Paul, MN 5 mi
- Inver Grove Heights, MN 5 mi
- Saint Paul, MN 5 mi
- Eagan, MN 6 mi
- Newport, MN 7 mi
- Richfield, MN 7 mi
- Falcon Heights, MN 8 mi
Guides for Mendota Heights homeowners
Boiler Replacement Cost in Minnesota (2026)
What a new boiler costs in Minnesota: national ranges, cast iron vs condensing vs combi, steam vs hot water, chimney venting, and why the radiators stay.
Read the guideWhy Is My Furnace Leaking Water? Find the Source, Then Fix It
Water around your furnace? Find the source by where and when it drips: condensate trap, pump, frozen line, humidifier or AC coil, and what can't wait.
Read the guide- Furnace Replacement Cost in Minnesota (2026)Pricing
- AC Leaking Water Inside the House: Causes and What to DoCooling
- Best Furnace Brands for Minnesota Winters (2026)Heating
Brands we service in Mendota Heights: AirEase · Amana · American Standard · Ameristar · Aprilaire · Arcoaire · Armstrong Air · Bosch · Broan-NuTone · Bryant · Buderus · Burnham · Carrier · Champion · Coleman · Comfortmaker · Concord · Daikin · Day & Night · Ducane · ecobee · Frigidaire · Fujitsu · Gibson · Goodman · Google Nest · Gree · Heil · Honeywell Home · Lennox · LG · Lifebreath · Lochinvar · Luxaire · Maytag · Midea · Mitsubishi Electric · MrCool · Navien · NTI · Payne · Peerless · Rheem · Rinnai · RunTru · Ruud · Samsung · Santa Fe · Tempstar · Trane · Triangle Tube · Utica Boilers · Viessmann · Weil-McLain · Westinghouse · York
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Heat out in Mendota Heights? Call or send a request.