Bay City, MI HVAC Services
Full-Service Heating & Cooling Across Saginaw, Midland & Bay Counties
Living in Mid-Michigan means dealing with real weather, from freezing winters to humid summers and everything in between. At Custom Engineering, we've been helping families and small businesses across Bay City, Saginaw, and Midland stay comfortable in every season since 1984.
Whether your furnace won't kick on during a January cold snap or your AC is blowing warm air in the middle of July, we're here to help you get your system back on track. We handle everything from new HVAC installations to same-day repairs and seasonal maintenance.
As a locally owned business deeply rooted in the Bay County community, we understand how quickly temperatures can swing around here, especially with the lake breeze and unpredictable Midwestern weather. That's why we're available 24/7. Someone will answer your call, assess the situation, and offer guidance on what steps to take. If needed, we can schedule same-day or emergency service when available.
With our 5-year labor warranty and commitment to quality service, you can trust our team to deliver enduring solutions. We pride ourselves on using the latest techniques and the best parts to extend the life of your HVAC system. Whether it's the middle of the night or during a holiday weekend, our priority is to ensure your home or business remains comfortable throughout all seasons
Need HVAC help now? Call (989) 474-2870 or contact us online for a free estimate on installation or replacement..
Why Choose Custom Engineering?
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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.
Custom Comfort for Every Season
Our Heating & Cooling Services
We provide comprehensive HVAC solutions throughout the Great Lakes Bay Region, covering everything from new installations to routine seasonal maintenance. We work with all brands and systems, and as a trusted Trane and Mitsubishi Electric dealer, we offer energy-efficient options designed to handle Michigan's unique weather.
Custom Engineering services include:
- New HVAC system installations. We help property owners choose the right heating and cooling system for their space, whether that's a traditional setup or something more modern like a ductless mini-split. We handle every step from planning to installation and back our work with a 5-year labor warranty.
- Furnace and AC replacements. If your old system is costing more than it's worth, we'll walk you through the replacement process and explain your options in a way that's easy to understand.
- Same-day and emergency HVAC repairs. We offer same-day service whenever possible, with 24/7 availability to discuss your HVAC issues and help determine the best course of action so your system gets the attention it needs when you need it most.
- Preventative maintenance and seasonal tune-ups. Regular service helps your system perform better and last longer. During a tune-up, we'll clean the components, check electrical connections, test system operation, and look for any early signs of wear. This helps prevent bigger problems later.
- Indoor air quality services. Dry air, dust buildup, and other indoor air concerns can make your home less comfortable. We offer solutions like air purifiers, humidifiers, and upgraded filtration to help improve the air you breathe every day.
- Ductwork repair and upgrades. Leaks, gaps, or aging ductwork can reduce the performance of even the best HVAC systems. We repair and modify ductwork to help airflow and system efficiency, especially in older properties around Bay City and Saginaw.
In addition to our comprehensive services, we pride ourselves on our customer-first approach. From the moment you contact us, our goal is to ensure you feel informed and confident in the steps necessary to meet your heating and cooling needs. We know the importance of having a reliable HVAC partner, especially in Michigan’s unpredictable climate, and we strive to be that trusted resource at every service call.
Choosing the Right HVAC Contractor in Bay City
Hiring an HVAC contractor isn't just about who can get the job done fastest—it’s about long-term value and service you can trust. Here are key factors to consider:
- Licensed and Insured – Always verify proper licensing and liability insurance to protect your home.
- Warranty Coverage – We stand behind our work with a 5-year labor warranty, showing our commitment to quality.
What Else Can We Help With?
- Thermostat installations and upgrades. Upgrading your thermostat can make a big difference in how your home feels and how much energy you use. We install smart thermostats and programmable models that help you better manage your comfort.
- Ductless mini-split system service. Mini-splits are a great fit for homes without central ducts or for spaces like sunrooms, garages, and additions. We service and install ductless systems, including Mitsubishi Electric models known for their reliability and efficiency.
- Fuel oil furnace repair and maintenance. In rural parts of Bay County and the Saginaw Valley, oil heat is still common. We’re one of the few HVAC companies in the area that continues to work on oil-fired systems. Whether it’s maintenance, a repair, or a conversation about switching to another energy source, we’re here to help.
We understand that every home and business has unique heating and cooling needs, and our tailor-made solutions reflect that understanding. Our team is equipped to provide insightful consultations, helping you select the optimal systems for your specific requirements, whether you need energy-efficient solutions or systems that can handle extreme weather conditions. Our commitment is to provide transparent, personalized service that ensures you achieve the best performance and value.
Need heating or AC repair in Bay City? Contact us today at (989) 474-2870 or online and learn more about our financing options.
Commonly Asked Questions
How often should I schedule HVAC maintenance?
It's best to schedule maintenance twice per year—once in spring for your cooling system and once in fall for heating. Regular maintenance improves performance, efficiency, and system lifespan.
What HVAC system is best for Michigan winters?
A high-efficiency furnace paired with a programmable thermostat is ideal for Bay City’s cold climate. We can also recommend hybrid systems for year-round savings.
How long do HVAC systems usually last?
Most systems last 10 to 15 years, depending on usage and maintenance. Newer models with high SEER ratings tend to last longer and operate more efficiently.
Are ductless mini-split systems a good option?
Yes. Mini-splits are ideal for room additions, older homes without ductwork, or zone-specific climate control. They’re quiet, efficient, and offer year-round comfort.
What are signs of poor indoor air quality?
Common symptoms include increased allergies, dust buildup, and musty odors. We offer air filtration, UV lights, and humidity control to address these issues.
How do I know if I need HVAC repair or replacement?
If your system requires frequent repairs, struggles to keep up with demand, or is over 15 years old, a replacement may be more economical in the long run.
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"Custom Engineering took care of us right away!"Our initial call was after hours and not an emergency. We received a call first thing the next morning, and they came out within a few hours. Both gentlemen were very professional and knowledgeable, and were able to repair our furnace right then and there.- Reid K.
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"I don't know what I do without this company!"Chaz did an amazing job - straightforward and very helpful. Jason and Trey set up the furnace a week ago, and it runs amazingly! It's nice to stay warm again. They just repaired and replaced my bathroom exhaust fan, too. Thank you again!- Cesily W.
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"10/10 Service!"Had Customer Engineering come out to my restaurant to diagnose my furnace and walk-in freezer. Brandon and Skylar, the techs, were amazing. Extremely friendly and knowledgeable. I will be using them for all my HVAC needs moving forward.- Taylor A.
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"They did a great job!"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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"Nick was fantastic!"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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"By far the most professional and reliable company."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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"They have been an excellent company to work with."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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"My experience with the company was great!"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.