34" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 38 5/8"] w20h20 Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 23 3/4" x 1"

Works for all Air Conditioning applications including Ductless Mini-Split

actual front end outer dimensions are approximately 10 5/8" width X 28 5/8" height

Measure the size of the vent opening

34" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 36 5/8" X 38 5/8"] w20h20 Actual Filter Size – 13+ Product Details Size 34"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 36 5 8" width X 38 5 8" height Actual Filter Size 33 3 4"w x 35 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.