18" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 34 5/8"] w14h14 accordion-content { display: none

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+ Product Details Size - 26"w X 22"h is the size for the duct opening measurement only

You may think of grilles and registers as a generic component of the ventilation system in your house

Actual Front End Outer Dimensions Are 5

Actual Filter Size – 17 3/4"w x 15 3/4" x 1"

18" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 34 5/8"] w14h14 accordion-content { display: none+ Product Details Size 18"w X 32"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 34 5 8" height Actual Filter Size 17 3 4"w x 31 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.