Furnace Installation in Lakeville, MN
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Dakota County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat, ten below to keep up with
Lakeville needs a furnace running from October through May, eight months a year. On winter nights that average 10°F, it is not cycling on and off so much as staying on. A new furnace here has to hold up to that kind of use every year, not just get through the odd cold snap.
Most homes in the area heat with gas, and any non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE. That is the floor, not a feature, worth knowing before anyone calls a unit a good deal. Storms are part of the picture too. The area has seen 37 winter storms and 56 damaging wind events over the past ten years, and statewide, 13 percent of households lost power for at least a day in 2024. A furnace that comes back on by itself once power returns matters when a storm is what knocked it out in the first place.
- 8 months
- October through May, your furnace is on duty
- 10°F
- the average winter night it heats against
- 79%
- of homes here heat with gas, so most furnaces here burn gas
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
A high-efficiency gas furnace would save about $110 a year to run in Dakota County compared with a gas furnace.
Estimates for a typical Dakota County home, from EIA household energy data, Minnesota fuel prices and NOAA climate normals. Your home will differ.
Minnesota has no state license for HVAC contractors.
Minnesota keeps no record of who installs furnaces and no test anyone has to pass to do it. Anyone can put up a sign and call themselves a furnace contractor. There is no license number tied to the work and no state board reviewing complaints against one, because the state does not issue either.
What stands between you and a bad installation here is the local permit process. In most cities and counties, putting in a new furnace needs a permit from the building office and an inspection once the work is done, and that inspection is what checks the gas connection and venting rather than any license. That matters in Dakota County, where 79.2% of homes heat with gas, because a bad connection on a gas furnace is the dangerous part of the job, and the inspector, not a license, is what catches it here.
Source: Minnesota Office of the Revisor of Statutes
- What size furnace does my house need?
- There is no single answer without a load calculation. A contractor figures this out room by room, looking at your square footage, insulation, windows, and how the house holds heat when it is 10°F outside, which is a normal winter night here. A furnace that is too big cycles on and off too often and never runs long enough to heat evenly. Too small, and it runs constantly all winter without keeping up. Ask whoever quotes the job to show you the calculation, not just a number based on your old furnace.
- How do I know it's time to replace my furnace?
- Age is the first clue. Furnaces installed new usually last a couple decades, and once yours gets there, repairs get more frequent and less worth doing. Watch for uneven heat between rooms, a furnace that runs longer than it used to, or a yellow flame instead of blue, which points to a burner problem. With heat needed here from October through May, a furnace that struggles in one part of the season usually fails in the coldest part of it. If a contractor is quoting a major repair on an older unit, ask what replacement would cost instead, since that comparison often settles the decision.
- Is a high-efficiency furnace worth it?
- Every furnace sold new today has to reach at least 80 percent AFUE, so the real question is whether to go higher than that. High-efficiency furnaces use a second heat exchanger to pull more heat out of the exhaust before it leaves the house, instead of sending that heat up the flue. That matters more here than in places with short winters, since your furnace runs 8 months out of the year. The tradeoff is that high-efficiency units need a dedicated vent, often through a wall rather than the old chimney, which affects what the installation involves. A contractor can walk through what your house would need for either option.