26" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 30 5/8"] white our Circular Air Supply Valves

our Circular Air Supply Valves are ideal for low and medium pressure ventilation air conditioning systems

If your hole is 14" wide by 20" tall

actual front end outer dimensions are approximately 10 5/8" width X 22 5/8" height

Actual Filter Size – 11 3/4"w x 25 3/4" x 1"

26" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 30 5/8"] white our Circular Air Supply Valves+ Product Details Size 26"w X 28"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 28 5 8" width X 30 5 8" height Actual Filter Size 25 3 4"w x 27 3 4" x 1" High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on