Furnace Installation & Replacement in Willis, Michigan
Willis is about 18 minutes from our shop in Ypsilanti. A new gas furnace sized to your house, vented correctly, commissioned on a combustion analyzer, and installed by the owner. Free estimates, and an honest answer first about whether you need one.
Temprasure installs gas furnaces throughout Willis, and the question we get most often is whether a high-efficiency 96 percent unit is worth it over an 80. The honest answer depends on the house. In the 1950s–80s rural ranches and farmhouses with scattered 2000s builds common around the Augusta-Sumpter township line, a condensing furnace saves real money on DTE Energy gas across a 6,000-degree-day winter, but it also needs a side-wall PVC vent and may leave the water heater alone on an oversized chimney. We sort all of that out on a free estimate at your Willis home before you decide, and we tell you plainly which option we would put in our own house.
Willis houses and what that means for furnace installation
The typical Willis house is a 1950s–80s ranch on a crawlspace or a shallow block basement, built by a farm family or an auto worker on a piece of split-off land, and heated by a furnace that has been replaced once or twice without anyone enlarging the ductwork. Many of these were originally on fuel oil, and we still find abandoned oil tanks in basements and oil-to-gas conversion furnaces that are long past their design life. The farmhouses along Bunton and Tuttle Hill Roads are 1870s–1920s two-stories with Michigan basements and a forced-air system threaded in after the fact, usually with cold upstairs bedrooms as the result. Scattered 1990s–2010s acreage homes are colonials and ranches on full basements with 80 or 90 percent furnaces, more often propane than natural gas. Manufactured and modular homes are a larger share of the housing here than in the rest of the county, and their package units and small downflow furnaces are a regular part of our work.
Ductwork sets the ceiling on what a new furnace can do in Willis. A variable-speed furnace with a modern ECM blower is only as good as the trunk lines and returns it connects to, and the 1950s–80s rural ranches and farmhouses with scattered 2000s builds in 48191 frequently have a single undersized return in the hallway and supply runs that were never balanced. On a replacement we measure static pressure with the old furnace running, and if it is high we tell you what the ductwork needs, whether that is an added return, a sealed trunk or a few resized branches. Sometimes the duct fix is a small add-on; sometimes it is the difference between a furnace that works and one that trips its limit switch all winter.
Willis winters are long enough that a furnace runs more hours in a year here than an air conditioner runs in five. We maintain and repair the gas furnaces in the 1950s–80s rural ranches and farmhouses with scattered 2000s builds near the Willis Road and Rawsonville Road corner and the Willis Post Office, the hot-water boilers in the older houses around the Willis crossroads at Willis and Rawsonville Roads, and the furnaces in newer subdivisions out toward Bunton Road corridor where builder-grade equipment hits its first real failures around year ten. The shop is 10 miles away, the truck carries the parts that fail, and a heating call in Willis ends with heat on the first visit far more often than not.
Local details we plan around in Willis
- DTE gas follows Rawsonville Road and Willis Road through the crossroads, but most side roads are propane-only, and we confirm fuel type before quoting any equipment.
- Private wells supply every home, and the water is hard with iron and sometimes sulfur, which eats water heater anodes and leaves sediment that needs flushing.
- Permits for Willis addresses go through Washtenaw County's building department, and inspections are scheduled on the county's southern-township rotation.
- Willis is as flat as anywhere in Washtenaw County, and drainage is slow enough that ditches and field tiles run most of the spring. Crawlspaces near Paint Creek and along the lower stretches of Bunton Road stay wet into June, and that moisture finds its way into ductwork and furnace cabinets. Winter wind crosses the fields unbroken, and summer brings long humid stretches with little shade outside the old farmstead windbreaks.
What Willis homeowners call about
Repairs three winters in a row
One repair is a repair. Three in three years means the rest of the furnace is close behind, and the money is better spent on new equipment.
Short cycling that no repair fixes
A furnace badly oversized for the house will short cycle forever, wearing out ignitors and stressing the exchanger. Right-sizing on replacement fixes it permanently.
Over 20 years old and needing a major part
An inducer, blower motor, control board or gas valve on a furnace from the early 2000s or before often costs enough that a new furnace wins on cost over the next few winters.

Covered on a Willis visit
- Mechanical permit and municipal inspection
- Condensate trap, neutralizer where required, and freeze-protected drain routing
- Manual J heating load calculation for the house as it is today
- Thermostat matched to the furnace staging, programmed and tested
- New supply plenum and return drop sealed to the existing ductwork
- Honest assessment of whether the existing furnace should be replaced at all
How a furnace installation call works
Free estimate and honest assessment
Al inspects the existing furnace and heat exchanger, the ductwork, the venting, the gas line and the water heater's vent, measures the house, and tells you first whether replacement is actually warranted.
Manual J and written options
We calculate the real heating load and give you two or three sized options in writing: typically an 80 percent single-stage, a 96 percent single- or two-stage, and where it fits a variable-speed unit. Each with a flat price.
Permit, equipment and scheduling
We pull the mechanical permit with your municipality, order the furnace and any coil or venting materials, and set an install date. If you are without heat, we move fast and can set temporary heat.
Reviews from nearby homeowners
★★★★★Al and his team are great. Our furnace stopped working on New Year's Eve. I called 10 HVAC shops and no one would come out except Al. He helped determine our problem and within a week I had a new furnace that was covered by my home insurance. I had a few problems post-install and the Temprasure team came over immediately on the weekend to fix it. Great company. Highly recommend!!
Furnace Installation questions from Willis
Is a furnace estimate in Willis free?
Yes. The in-home estimate for a furnace replacement anywhere in Willis, MI is free and comes with no obligation. We inspect the existing furnace, run the load calculation, check venting, gas and ductwork, and leave you written flat-rate options.
Do you pull the permit for a furnace installation in Willis?
Always. We file the mechanical permit with the Willis building department or Washtenaw County, schedule the inspection and meet the inspector. The permit is included in the quoted price.
Will you give a second opinion on a furnace replacement quote in Willis?
Yes, and we encourage it. We have found condemned furnaces in Washtenaw County that needed a flame sensor. If the heat exchanger really is cracked, we will confirm it so you can replace with confidence, and we will tell you honestly whether the other quote is fair.
Should I get a 96 percent furnace for my Willis home?
Often yes, but it depends on your venting and water heater. A condensing furnace saves on DTE Energy gas across a long Washtenaw County winter, but it needs a side-wall PVC vent and may leave the water heater on an oversized chimney. We evaluate both and recommend honestly.
Can you replace my Willis furnace if I have no heat right now?
Yes. No-heat replacements go to the front of the schedule. We can usually get equipment within a day or two and set up temporary electric heat in the meantime, or make a safe repair to get you through until install day.
Serving every part of Willis
A new furnace for a Willis, MI house should be sized right, vented right, commissioned on a combustion analyzer and installed by someone who will answer the phone afterward. Al is about 18 minutes away in Ypsilanti, the estimate is free, and the quote is one flat number that includes the permit, the haul-away and the startup. Book a free, no-pressure estimate today by phone, text or the online form.
Neighborhoods and areas we run to regularly: Willis Road east toward Sumpter, Tuttle Hill Road south of Willis, Bunton Road corridor, Arkona Road area, Hitchingham Road area, the Willis crossroads at Willis and Rawsonville Roads, and the rest of Willis.
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Furnace Installation & Replacement in Willis, quoted before we start
Call or text (313) 701-9471. Willis is a 18-minute run for us and we are open around the clock.