26" X 34" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 36 5/8"] Aluminum 4" X 14" Is The

4" X 14" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

Actual Filter Size – 13 3/4"w x 7 3/4" x 1"

if your hole is 20" wide by 14" tall

actual front end outer dimensions are approximately 5

Its removable face allows hassle-free cleaning

26" X 34" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 28 5/8" X 36 5/8"] Aluminum 4" X 14" Is The+ Product Details Size 26"w X 34"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 28 5 8" width X 36 5 8" height Actual Filter Size 25 3 4"w x 33 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.