36" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 10 5/8"] white Energy Efficient – Air-tight inner CRFG2028 Width_14in 4 X 12 Is

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

+ Product Details Size – 28"w X 28"h is the size for the duct opening measurement only

+ Product Details Universal Fit - Accommodates almost any thermostat with dimensions of 8-1/4" H x 5-3/8" W x 3-1/2" D

75" Width X 13

Whether you're restoring an old Victorian or craftsman style home

36" X 8" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 38 5 8" X 10 5 8"] white Energy Efficient – Air tight inner CRFG2028 Width_14in 4 X 12 Is Energy Efficient – Air tight inner core decreases the pressure loss and provides a more hygienic environment high energy efficient No fiberglass erosion into air stream + Product Details Size – 28"w X 28"h is the size for the duct opening measurement only