25" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 27 5/8" X 34 5/8"] RG66 Black-HP + Product Details Size -

+ Product Details Size - 8"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 20"h is the size for the duct opening measurement only

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

Premium Airflow Efficiency - High-performance cube core eggcrate design allows 95% airflow efficiency

actual front end outer dimensions are approximately 4

25" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 27 5/8" X 34 5/8"] RG66 Black-HP + Product Details Size -+ Product Details Size 25"w X 32"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 34 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