
Areas We Serve
At Custom Engineering Heating & Cooling, we proudly provide expert heating and cooling services throughout Bay City and the surrounding areas. As a locally owned and operated business based in Linwood, MI, we understand the unique demands of Michigan’s seasons and are committed to keeping homes and businesses comfortable year-round.
Whether you're dealing with a furnace that won’t fire up in the dead of winter or an air conditioner struggling during a summer heatwave, our experienced technicians are here to help, nights, weekends, and beyond. From new installations and fast repairs to reliable preventative maintenance, we offer personalized service with the professionalism and responsiveness you deserve.
Service Area
We proudly serve customers in the following Michigan communities:
- Auburn
- Bay
- City
- Beaverton
- Bentley
- Birch Run
- Bridgeport
- Burt
- Chesaning
- Coleman
- Essexville
- Frankenmuth
- Freeland
- Gladwin
- Hamlock,
- Hale
- Kawkawlin
- Linwood
- Merrill
- Midland
- Munger
- National City
- Oakley
- Omer
- Pinconning
- Prescott
- Reese
- Rhodes
- Rose City
- Saginaw
- St. Charles
- St. Helen
- Sanford
- Shields
- Standish
- Sterling
- Tawas City
- Twining
- West Branch
- Whittemore
- East Tawas.
Why Homeowners and Businesses Choose Us:
- Deep roots in the Bay City and Linwood communities
- Affordable financing options to fit your budget
- Flexible scheduling, including evening and weekend availability
- Preventative maintenance plans to help you avoid costly breakdowns
- Honest, dependable service from a local team you can trust
Your Comfort Is Our Priority
No matter where you live within our service area, Custom Engineering Heating & Cooling is just a call away. Let us help you stay comfortable all year long with the experience, service, and value you deserve.
Ready to schedule service or request a free estimate? Contact us today and see the difference a local expert can make.

Custom Comfort, Professional Care
What Makes Us Different?
At Custom Engineering, we will always put you first. That's why so many people in Linwood trust us time and again.
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Affordable Financing OptionsWe make HVAC services affordable with financing options offering 0% interest for 72 months.
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Available Nights & WeekendsNo matter when you need us, we're ready to help. Someone is always available to answer your call.
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Preventative Maintenance PlansKeep your system in perfect shape all year round with our programs.
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Locally Owned & OperatedAs a proud Michigan company, we deliver honest, dependable HVAC services backed by local expertise and care.

Trusted by homeowners and Businesses Since 1984
At Custom Engineering, your satisfaction is our priority! See for yourself what our customers have to say about working with us.
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Quick, efficient, and friendly service from both office staff and techs. Fair pricing. Grateful for their help on a freezing day when our furnace failed. Feared the worst. Highly recommend this company!- Tammie S.
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Every employee I have had the pleasure of dealing with has been top-notch. Today's visit by Tyler for annual maintenance was great. He was punctual, friendly, and professional.- Michelle G.
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Always courteous & competent. They installed a new furnace, AC, garage gas heater, and ran a gas line into our laundry room. They stayed on the job until all was completed and we were extremely satisfied.- Terrance V.
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He got our furnace up and running again very quickly (on a Saturday!). Very personable and professional! We will definitely be using Custom Engineering Heating & Cooling again - thank you!- Krista W.
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I needed help, and Custom Engineering got to me fast and saved the day. Nick, the technician, was great. He was personable and intelligent and he got my repair done super fast. Thanks, Custom Engineering!- James T.
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We bought our kitchen hood system from them, which they also installed (no small task). They are dependable, efficient, and do great work. Prices are what I would expect for the job. Don't hesitate to hire them.- Marinell S.
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We went through custom engineering for replacing our furnace and air conditioner. They went above and beyond to do what is best for our home. The whole team was respectful and informative. They answered any questions we had!- Allison E.
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Chaz went above and beyond! He fixed my main house furnace and also advised me on my ceiling-mounted furnace in my back building. Thank you for your quick response. I will use you again!- Ann K.