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Sheet Metal Fabrication Custom Engineering

Sheet Metal Fabrication

Master craftsmen build a full range of HVAC applications in the company's own shop.

  • Duct systems
  • Lab hoods
  • Equipment exhaust systems
  • Fume, chemical, and dust exhaust systems

Specialty metal fabrications:

Specialty metal fabrications:

  • Welded black iron
  • Black plate
  • Aluminum and stainless steel
  • In-house fabrication ensures a higher level of quality and faster installation.
See How We’re Giving Back We're proud to support our Bay City community through local events, partnerships, and service.
  • Convenient Financing Options

    We make HVAC services manageable with convenient financing options.  Subject to credit approval.

  • Preventative Maintenance Plans
    Keep your system in perfect shape all year round with our programs.
  • Locally Owned & Operated
    As a proud Michigan company, we deliver honest, dependable HVAC services backed by local expertise and care.

Hear From Our Happy Customers

    "So grateful to them!"
    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.
    "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.
    "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.
    "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.
    "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.
    "This business is the best!"
    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.
    "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.
    "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.
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Ask the Experts

Common Answers To Your Questions

Curious about heating and cooling? Our Custom Engineering team has you covered. Browse through common questions and find expert advice straight from our pros.

  • Why is a system with matched components so important?
    A matched system is important for a variety of reasons. One is comfort. When all your components are properly sized for your home, you can control exactly how much heating or cooling you need so you can relax. Also, a properly sized matched system enables every component to perform as designed, meaning proper cycle times are maintained, humidity is controlled, and system sound is minimized.

    Another reason matched systems are important is efficiency. Most systems people buy are too large for their homes, which uses more energy than is needed for your home. A matched system outlined by a dealer who has completed a load calculation for your home provides just the right amount of heating and cooling you need, so you get the most value for your utility dollar.
  • What are the advantages of equipment with variable speed fans?
    Variable-speed fans operate on a simple principle: they can spin at different speeds depending on your home's heating and cooling needs. Usually, they operate at lower speeds, delivering a steady, reliable stream of warm or cool air to your home. This helps control humidity levels, utility costs, and system noise. When conditions become more extreme, the fan speed increases so that the system can meet increased demand, guaranteeing that your comfort needs will be met on the hottest days or coldest nights.
  • Will a bigger sized system perform better?
    No, you don't want your air conditioner to be too big. Air conditioners control the comfort level in your home by cooling the air and by removing humidity. An oversized air conditioner will cool your home faster, but it will use more energy and will not remove humidity adequately.

    A unit that is too big for your home will have short-run cycles. It may take only a short time to cool the air, but the unit shuts off before enough air blows across the indoor coil, where moisture condenses into water and drains from your system. Too much moisture left in the air can lead to mold and mildew problems.

    These short-run cycles also mean your system starts and stops more often, which uses more energy and causes a lot of wear and tear. An air conditioner operates more efficiently during long-run cycles.

    The same holds true with heating systems. An oversized furnace will warm the house quicker, but it uses more fuel and causes greater temperature swings in the home.
  • How does 2-Stage heating or cooling work?
    2-stage cooling is a method that can better manage your home's cooling while outdoor temperatures are changing. It can also better maximize indoor comfort and energy efficiency. 2-stage cooling systems are typically the most energy-efficient systems out there.

    2-stage cooling can be done by having one unit with two compressors, one small and one large. The small one is typically capable of putting out about 50% of the capacity of the larger one. The second way to have 2-stage cooling is to have a single scroll unloading compressor. This compressor can unload its capacity down to about 66% of maximum capacity. Both these methods of getting 2-stage cooling allow the unit to run at a lower stage when the high stage is not needed. By doing this, energy is saved.

    2-stage heating has the same principle as 2-stage cooling. It allows the unit to adjust itself based on the amount of heating that is necessary. 2-stage heating is a good way to save on heating costs.

    A heat pump system would have two different-sized compressors, a small and a large one. The compressor that is used at a given time would depend upon the need. If only a small amount of heating is necessary, the smaller compressor would be used to save energy. The large compressor would only be used when a large amount of heating was needed.

    A 2-stage gas furnace has a modulating gas valve that regulates gas flow depending upon the need.

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