Custom Modular Systems

Our Winning Formula

Engineering, Manufacturing &
Installation Support

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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.

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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.

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Delivery & Installation

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.

We Offer World Class Experience & Expertise

Since 2015

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.

Building on the decades-long legacy of Miller Industries, Flex Air has been driven to reinvent traditional construction and deliver solutions that offer better speed to market, dramatically reduced labor costs, and a better ROI for our customers. Our manufacturing process delivers precise results and we engineer our solutions to minimize onsite space requirements along with maximizing building operations and owner savings.



In people

In a diverse work environment, people are accepted and treated like family.  New employees offer a unique perspective that adds to the balance of our workplace and community.  Our culture, along with the variety of talented associates throughout various departments, inspires our team members to be comfortable.


In jobs

Our people are involved in the design, manufacturing, installation, and maintenance of hundreds of systems throughout North America.  We pride ourselves on delivering the highest quality products at an affordable price and within a timely schedule.


In Skills

We hire a variety of people with diverse expertise and skills. We look for innovative thinkers, creative minds, and detail-oriented leaders, to name a few.