25" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 27 5/8" X 24 5/8"] Color_Aluminum Measure the size of the

Measure the size of the air duct/drywall opening

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

Efficient Airflow Design: The slots are meticulously angled to diversify airflow in two directions

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providing superior air distribution throughout your space

25" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 27 5/8" X 24 5/8"] Color_Aluminum Measure the size of the+ Product Details Size 25"w X 22"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 24 5 8" height Actual Filter Size 24 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.