34" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 20 5/8"] w22h22 while the ingenious dial-controlled damper

while the ingenious dial-controlled damper empowers you to effortlessly regulate airflow using your foot

no professional tools needed

Actual Filter Size – 24 3/4"w x 27 3/4" x 1"

ceiling height)

+ Product Details Size – 16"w X 24"h is the size for the duct opening measurement only

34" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 20 5/8"] w22h22 while the ingenious dial-controlled damper+ Product Details Size 34"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 36 5 8" width X 20 5 8" height Actual Filter Size 33 3 4"w x 17 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.