18" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 38 5/8"] w6h6 Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 17 3/4" x 1"

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height -

Filter grille features a user-friendly plastic latch that requires no screwdriver for opening

ensuring that you find the perfect fit for your ventilation needs

18" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 38 5/8"] w6h6 Actual Filter Size – 13+ Product Details Size 18"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 38 5 8" height 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. Our filter grille latch is easy to use on