Furnace Installation in Woodbury, MN
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Washington County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat, and nights near 10 degrees
Woodbury needs a furnace from October through May. That's eight months a year the burner is doing the work of keeping the house livable, and it's doing that against winter nights that average 10°F.
A new furnace here has to be sized for that cold, not for a mild average. Most furnaces installed today run on gas, and any non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE. Washington County has also seen 34 winter storms and 26 damaging wind events over the past ten years. That kind of weather can knock out power along with the heat, and in 2024 thirteen percent of Minnesota households lost power for a full day or more.
- 8 months
- October through May, your furnace is on duty
- 10°F
- the average winter night it heats against
- 80%
- 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 $100 a year to run in Washington County compared with a gas furnace.
Estimates for a typical Washington 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 does not put HVAC contractors through a state licensing exam, and it does not keep a registry of who does this work. That means there is no state credential to check here, and no state agency that tested this contractor before they picked up the phone.
For a furnace installation, the protection in Washington County comes from the local building office instead. Most cities and counties here require a permit before a furnace is replaced, and an inspection once the work is done. That inspection is what catches a bad gas connection or a venting mistake, which is the part of this job that can actually hurt someone. With most homes in Washington County heating with gas, that inspection is doing real work.
Source: Minnesota Office of the Revisor of Statutes
- What size furnace does my house need?
- A contractor works this out with a load calculation, not by matching the old furnace or going by square footage alone. That calculation looks at your insulation, your windows, your walls, and your ceiling height, then figures out how much heat your house actually loses on a cold night. A furnace that's too big cycles on and off too often and never runs long enough to heat evenly. One that's too small runs constantly and still can't keep up when it's 10°F outside. With winter nights here averaging that cold, getting the size right matters more than it would somewhere milder.
- How do I know it's time to replace my furnace?
- Watch for a furnace that's struggling to keep rooms warm, cycling on and off more than it used to, or needing repairs more often. Age matters too. If yours is old and a repair is going to cost a real fraction of what a new one costs, replacing it usually makes more sense than fixing it again. Since homes here need heat from October through May, a furnace that's already showing trouble in fall is one you don't want to gamble on through eight months of winter.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and what your gas bills look like now, so a contractor can walk through the actual numbers for your situation. What's true everywhere is that any furnace installed today has to meet 80.0 percent AFUE at minimum, since that's the federal standard for furnaces built from November 2015 on. A high-efficiency furnace goes above that minimum, and the higher the rating, the less gas it takes to make the same heat. Most homes in this area heat with gas and need heat eight months a year, so that gap between the minimum and a higher rating gets more chances to add up here than somewhere with a shorter winter.