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Experts in Air Handling

Learn about the products we offer.

Creative Solutions for Critical Environments.

Learn about the industries we serve.

"You made us look like heros to our customer"

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Innovation, Knowledge and Integrity.

Learn about what defines us.

About Mainstream Fluid & Air

Welcome! Here at Mainstream we pride ourselves in our ability to find solutions for our customer’s air handling needs. We bring unrivaled innovation and agility to the industry, paired with expertise fine-tuned through decades of experience manufacturing air handling units and components.

Through the years we have expanded the services that we offer to include free site visits, engineering and factory site assembly. By pairing this with the array of products we offer, we have become a true solutions provider for many customers across a range of industries.

Industries

Government

Hospitals

Education

Hygienic, Pharmaceutical & Food Manufacturing

Pools & Athletic Facilities

Data Centers
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Products

Air Handling Units

Coils

Fan Arrays

Check Out Our Services
Thank you for the quick turnaround. It is great to know there are companies out there that we can count on.

- Utility Systems Operation Supervisor, Hanscom Air Force Base
Thank you so much for your help, you made us look like heros to our customer, and anytime you can do that it is a good feeling. The guys were so impressed how the coil was an exact match. Thanks again and we will always keep you in mind

- Account Manager, Granite State Plumbing & Heating
I can’t imagine a world where every vendor got their stuff back as fast as you do. Thanks a bunch.

- Project Manager, Debra-Kuempel
Got it on time! Build with obvious quality! Shipped in perfect condition! We’re not used to this but we could get to liking it!

- President, Bailey Refrigeration and Air Conditioning
If there is anyone you would like me to direct some positive feedback to, I’d be happy to do it. It’s been a long time since I’ve experienced service like the entire Mainstream team provided on this order.

- General Manager, Trotter & Morton
If you utilize them, you won’t be disappointed, great communication, good customer service, very good product.

- HVAC Systems Supervisor, Lackland Air Force Base
“I have found Mainstream equipment built to a very high standard to deal with our demanding applications, while being competitive in pricing. Their sales and engineering staff have been responsive and helpful in making equipment selections and offering solutions to difficult projects.”

- Assistant Director of Facilities, Cold Spring Harbor Laboratories
“Thanks, you guys have been great to work with and all of the coils we get from you guys are RIGHT! May not seem hard to you guys, but believe me we have been looking for a dependable coil vendor for a long time!“

- Vice President, WW Gay Mechanical Contractor
"We have many ancient air handlers here at The United States Military Academy at West Point NY. We have utilized Mainstream a lot lately based on a great recommendation that I received from one of the engineers here on post who has dealt with...Read More
"We have many ancient air handlers here at The United States Military Academy at West Point NY. We have utilized Mainstream a lot lately based on a great recommendation that I received from one of the engineers here on post who has dealt with Mainstream while doing huge renovations in our buildings. It turns out that he was correct. We have had no problems at all with the fit of the custom built replacement coils that we have purchased. They have all fit perfect. I also like that we can pick how quick we need the coil, being able to pay less if we are not in a rush for an individual coil. Customer service has also been excellent. "


- AD, IMES Supervisor, USMA West Point NY
I just wanted to let you know that my guys changed out that steam coil last night. They said that the coil was a perfect fit and the swap out could not have gone any better because of that. Thanks for your help!

- Service Manager, Lincoln Energy Mechanical Services
Sorry for the delayed response but I wanted to reach out to both of you to say thanks. The coil arrived on time as planned and fit all of the size requirement challenges we had, the installation went very well. Consider us a very happy customer and...Read More
Sorry for the delayed response but I wanted to reach out to both of you to say thanks. The coil arrived on time as planned and fit all of the size requirement challenges we had, the installation went very well. Consider us a very happy customer and you will be in my sights for sure on the next job


- Maintenance Supervisor, Harvard University