Furnace Installation in Warren, MI
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Macomb County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat in Warren
Furnaces in Warren run from October through May. That is eight months of the year, with winter nights averaging 21°F from December through February. A new furnace here has to hold up to a long stretch of hard use, not just a few cold snaps.
Michigan sees its share of winter storms and wind, and in 2024 more than a third of households in the state lost power for at least 24 hours. A furnace needs power to run its blower and controls no matter how it's fueled, so an outage means no heat until the power is back. Most homes in Warren heat with gas, and any non-weatherized gas furnace built since November 2015 has to meet a federal minimum of 80 percent AFUE.
- 8 months
- October through May, your furnace is on duty
- 21°F
- the average winter night it heats against
- 88%
- 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 $120 a year to run in Macomb County compared with a gas furnace.
Estimates for a typical Macomb County home, from EIA household energy data, Michigan fuel prices and NOAA climate normals. Your home will differ.
Michigan requires HVAC contractors to hold a state license.
The license comes from the Board of Mechanical Rules, and it belongs to the contractor, not to any one job. That means the company doing your install has been tested by the state and has a record with it, separate from whatever job they're on.
In most cities and counties, a furnace install also needs a permit from the local building office, with an inspection once the work is done. That inspection is what checks the gas connection and the venting, the parts that make a furnace installation dangerous if they're done wrong. Most homes in Macomb County heat with gas, so that check applies to almost every job like this one.
Sources: Michigan Legislature · Michigan Department of Licensing and Regulatory Affairs
- What size furnace does my house need?
- The right size comes from a load calculation, not the square footage of your house alone. A contractor works through your insulation, windows, ceiling height, and how much of your wall faces north before landing on a number. Guessing high seems safe but it isn't. A furnace too big for the house cycles on and off fast, which wears out parts sooner and leaves rooms uneven. Since homes here need heat from October through May, getting this number right matters more than it would somewhere with a short winter.
- How do I know it's time to replace my furnace?
- Age is one sign, especially once a furnace has been through many winters with lows around 21°F. Rising repair bills are another. If you're calling for service every time the heat is needed, or a single repair costs a large share of what a new furnace would, replacing it is usually the better move. Uneven heat, a yellow flame instead of blue, or a furnace that runs constantly without keeping up are also worth having a contractor look at.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and how much you're already spending to heat it. Every new gas furnace sold today has to reach at least 80 percent AFUE, so the real choice is between that baseline and a higher-efficiency model above it. With heat needed here eight months of the year, that difference in efficiency gets more use than it would somewhere with a shorter winter. A contractor can look at your current furnace and your house and tell you whether the jump makes sense for your situation.