Born from Marco Zambolin’s 1981 patent research in Italy, MIX IND Technologies represents SINTRA’s long-developed approach to moving air through micro-perforated metal ductwork. The company brings that technology to North American building projects, working with design and construction teams to shape economical air-treatment systems for large or challenging spaces. SINTRA’s technology has been used in more than 15,000 projects over four decades.
AerosealBorn from U.S. Department of Energy research at Lawrence Berkeley National Laboratory, Aeroseal develops aerosol-based technology that seals leaking HVAC ducts and building envelopes from the inside. Founded in 2010 by Dr. Mark Modera and Amit Gupta, the Miamisburg company’s systems have been used to seal more than 260,000 buildings worldwide, while its dealer network delivers computer-controlled air sealing in more than 30 countries.MIAMISBURG, OH
Langdon, IncSince 1966, Cincinnati-based Langdon, Inc. has fabricated sheet-metal ductwork and related components from its 50,000-square-foot facility. The company stands out for its patented duct connections and products such as Sure•Clamp™ Access, a removable duct section designed to simplify fire-damper inspection and maintenance. Its engineering and estimating teams also develop custom applications for commercial and industrial projects.CINCINNATI, OH
Mestek MachineryWith more than 80 years serving HVAC fabricators, Mestek Machinery is a Cedar Rapids manufacturer known for building metal-forming equipment for sheet-metal ductwork. Its four established brands combine more than a century of experience, while the company supports duct shops with a nationwide service network and authorized dealers across the United States and Canada.CLEVELAND, OH
Duravent GroupBuilt from industrial names dating back to 1901, Duravent Group manufactures venting and air-control systems for residential and commercial applications. Formed in 2021 through the combination of DuraVent and Hart & Cooley, the Detroit-headquartered company brings 14 established brands together, with manufacturing and distribution operations across North America. Its commercial design team develops in-house, code-compliant exhaust solutions, including systems for demanding projects such as semiconductor facilities.ALBANY, NY