36" x 25" Steel Return Air Filter Grill for 1" Filter Removable Face/Door Round Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 22 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 16" OR 16" x 26" duct opening (measured at the opening)

75"H – fits a 20" X 4" duct opening

Unusual Noises: Inspect for any loose components or foreign objects inside the pump

our damper is designed to perfectly align with your setup

36" x 25" Steel Return Air Filter Grill for 1" Filter Removable Face/Door Round Pipe actual front end outer dimensions+ Product Details Size 36"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 27 5 8" height Actual Filter Size 35 3 4"w x 24 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.