HFC Enterprises is one of the best duct manufacturers who developed DuraFlange Duct Connection System to the HVAC ductwork market place in 2004. Based in Southern California, we have 20+ years of industry experience creating and manufacturing high quality innovative products. HFC Enterprises started off by supporting the mechanical contractors and duct manufacturers in Southern California and Las Vegas. Shortly after, we expanded across the nation and to Canada. Our minimalist approach to product design and vast manufacturing and engineering knowledge has led us to create the most rigid spiral pipe connector on the market—DuraFlange

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