Plenums & Air Returns
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Improve your heating, ventilation and air conditioning duct system by installing this Master Flow 15 in. x 13 in. Ductboard Triangular Terminal Box - R-6 that features an insulated fiberglass design. Insulated ductboard for improved temperature regulation. Product is "knocked down" for shipping and must be assembled.
The Duct-board Return Air Box is an R6 insulated box that installs traditionally in a ceiling. Can accept any size collar up to 18 in. Diameter (not included). Used as a central return vent box (Filter Grill Not included). Can be easily cut to size. Product is "knocked down" for shipping and must be assembled.
The Duct-board Return Air Box is an R6 insulated box that installs traditionally in a ceiling. Can accept any size collar up to 18 in. Diameter (not included). Used as a central return vent box (Filter Grill Not included). Can be easily cut to size. Product is "knocked down" for shipping and must be assembled.