36" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 24 5/8"] Color_R-8.0 Pink 1/2" White insulation will give

1/2" White insulation will give you a good R value of 3

actual front end outer dimensions are approximately 32 5/8" width X 28 5/8" height

allow you to customize airflow direction with ease

+ Product Details Size – 14" x 30" or 30" x 14" is the size for the duct opening measurement only

heat pump and centralized air ducted units

36" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 24 5/8"] Color_R-8.0 Pink 1/2" White insulation will give+ Product Details Size 36"w X 22"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 36 5 8" width X 24 5 8" height Actual Filter Size 35 3 4"w x 21 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.