GSI is a manufacturer of commercial Pipe and Fittings for the HVAC market. GSI’s mission is to be the market leader in product consistency, service, and innovation for low-pressure and medium-pressure duct systems. The organization has been supplying these products to markets from Maine to Florida and as far west as Kansas since 1998. The company has grown year over year by partnering with DMI’s distribution partners throughout the markets which it serves.