Welcome to Flex Air

We Offer World Class Experience & Expertise

We are a family owned and operated business. Our headquarters and manufacturing facilities are located in Fenton, Michigan at the Miller Industries building. Flex Air was founded in October 2015 under Miller Industries, LLC to serve many industries and customers throughout North America, Canada and Mexico.

  • Design Engineering
  • Retrofits
  • Custom HVAC
  • Custom Air Handling Units
  • Modular Electrical
  • Modular Mechanical
  • Commercial and Industrial HVAC
  • Pre-Fabricated Systems
Since 2015
Our Winning Formula

Engineering, Manufacturing & Installation Support


Our engineering specialists work hand in hand with clients to design a system that best fits the project needs. We utilize the latest computer design software to efficiently and effectively develop a custom solution.


Our team takes pride in every cut, weld, and piece of hardware that goes into the products we manufacture. Our dedication and willingness to build a quality product, in addition to going above and beyond for our clients has earned us a recognized place in the industry.


Delivery & Installation Support

The final step is the delivery and installation of your equipment. We work closely with your facility managers and staff to coordinate a seamless and pain-free installation allowing your system to be up and running as quickly as possible.

The Best Industry Services

High Performance Services For Multiple Industries


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