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.
Master Flow 20 in. x 25 in. Duct-board Return Air Box
$35.95
Category: Heating, Ventilation & Air Conditioning
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