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About Donovan Sheet Metal

Donovan Sheet Metal is a Middleton, Massachusetts-based HVAC sheet metal contractor specializing in the design, fabrication, and installation of high-quality duct systems for commercial, industrial, and institutional projects for over 38 years.

DSM supports mechanical contractors, general contractors, and owner/end users by handling the sheet metal scope of small to large HVAC projects. The company’s work includes duct systems, stainless steel, galvanized and black iron metal, lab exhaust, kitchen exhaust, exposed spiral systems, roof curb assembly, in-house welding, rigging, and related HVAC sheet metal services.

With decades of experience in the New England market, DSM has built its reputation around practical field execution, quality workmanship, and the ability to help complete projects on schedule and on budget. Operating from its facility at 5 Forms Way in Middleton, DSM serves as a trusted sheet metal partner for customers who need responsive support, skilled fabrication, and reliable installation expertise.

DSM’s goal is straightforward: deliver dependable HVAC sheet metal solutions with the craftsmanship, coordination, and accountability that contractors and customers expect from a specialized trade partner.

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