The patented DuraFlange design incorporates a rod into the outside perimeter of the flange for additional rigidity, making it ideal for oval and large size round ductwork. The flange can be constructed using a variety of 18 and 20-gauge materials including stainless steel, aluminum and paint lock. The DC ring, when used in combination with round DuraFlange rings, eliminates the need for a gasket in between the connecting flanges and creates a leak free seal. The DuraFlange System not only provides contractors with a quick and easy way to connect and install ductwork, but it provides energy conscious engineers and developers a leak free HVAC system.
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