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ABOUT US

Operating for more than 80 years, Greenlees Filter LLC and its United Air Filter line of industrial products has always been the industry leader in filter manufacturing. We have combined technology, quality, service and value to deliver an outstanding product to you. All our products are manufactured in our facility in Forest Park, IL.

Technology
Greenlees Filter LLC and its United Air Filter line of industrial products are on the cutting edge of filtration technology. Research and development are the hallmarks of a great filter manufacturer, and Greenlees Filter is a recognized industry leader not only for its outstanding R&D work, but also for its commitment to Quality Control.

Our 50,000+ square foot facility includes a state-of-the-art filter-testing laboratory, where we assess application issues, research new technology, and test innovative solutions. Our engineering staff has over 50 years of experience in the filtration industry. The synergy of combining this vast experience with new technologies benefits our customers in a myriad of ways. Being a filter manufacturer, we offer the flexibility to produce a custom filter, which is exactly right for you, in any quantity needed. Our customized approach in meeting the exact needs of our customers is what sets us apart from others in the filter industry.

Quality
We rigorously perform Quality
Control on our filters throughout all stages of the production process, from receiving raw materials to the finished products and packaging. Our Quality Control team ensures that the products you receive not merely meet, but exceed your expectations for filter quality.

Service
Greenlees Filter offers a direct connection between the customers and our experienced technical staff, so that your questions are answered promptly. An important plus is your ability to speak directly with an engineer for an immediate response to your technical inquiries. Our sales representatives and engineering team work closely together to produce same day responses to your quote requests. In fact, at all department levels of Greenlees Filter, orders are processed and produced quickly with your needs in mind. We pride ourselves on our exceptional customer service and quick lead times, which are among the shortest lead times in the filter industry.

Value
When you consider our organizational strengths highlighted above, our fast response and manufacturing times, and our competitive low pricing strategies, it is clear that our line of industrial products are simply the best value in industrial air filtration today. Contact us for a quote and find out why more and more customers every day turn to Greenlees Filter and our United Air Filter line of industrial products for all their air  filtration needs.                                   

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Meeting the filtration needs of industry"