20" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 22 5/8"] Filter Grille } /* TEXT STYLING */

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Whilst the maximum pressure for R410 is 700 PSI

Actual Filter Size – 23 3/4"w x 9 3/4" x 1"

Design – Fixed hinged for easy filter change & cleaning - uses a 1" thick filter

this model ensures top-notch air quality

20" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 22 5/8"] Filter Grille } /* TEXT STYLING */+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 22 5 8" height Actual Filter Size 19 3 4"w x 19 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.