Founded in Fort Worth in 1958, M&M Manufacturing produces sheet-metal goods and HVAC products, with a longstanding focus on air distribution and ventilation. It describes itself as one of the country’s largest producers of sheet-metal products and manufactures ductwork and fittings for residential and commercial construction. Its history includes acquiring Snappy Metal Products in 2016 and being purchased by Marmon Holdings in 2021.
Southwark Metal Manufacturing CoFounded in 1946, Southwark Metal Manufacturing is a third-generation family-owned company that makes sheet-metal ductwork for residential and light-commercial HVAC systems. It operates seven U.S. facilities and describes itself as one of the largest manufacturers in this specialty, with more than 3,000 stock items and custom fittings produced for wholesale distributors.PHILADELPHIA, PA
MKT Metal ManufacturingMKT Metal Manufacturing has supplied sheet-metal ductwork and HVAC accessories since 2004, fabricating products at facilities in York, Pennsylvania, and Wilson, North Carolina. It describes itself as a true manufacturer and provides commercial and industrial ductwork, including custom fabrication, while coordinating directly with project and field personnel.YORK, PA
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
Royal Metal ProductsFounded in Douglasville, Georgia, in 1989, Royal Metal Products manufactures and distributes sheet-metal HVAC products for residential and light commercial construction. Its Temple plant now spans more than 280,000 square feet and produces over 3,500 HVAC products, supported by an internal machine shop and company-operated delivery fleet. Acquired by Smiths Group in 2021, Royal Metal Products is now part of the Flex-Tek Division.SURPRISE, NY