M&M Manufacturing Company is a diversified sheet metal fabricator of round, rectangular, and spiral HVAC duct pipe and fittings for residential and commercial applications. M&M also offers general sheet metal products for roofing, ventilating, and architectural applications.

M&M provides superior high quality products with outstanding service, creating satisfied customers. From a two-person shop in 1958 to today's five technologically advanced manufacturing units, M&M has developed a reputation for reliability and service second to none. Whether you need prefabricated duct, custom HVAC sheet metal products, or precision tolerance sheet metal fabrications, you can depend on M&M!

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Air Flow is Critical to HVACR System Performance April 2008 RSES Journal article - Understanding the benefits--and drawbacks--of flex ductwork are critical to creating efficient HVAC systems.