16" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 18 5/8" X 22 5/8"] w20h20 Design – Unrestricted airflow for

Design – Unrestricted airflow for your HVAC system - adjustable one-way louver with full horizontal airflow directional control - single deflection supply grill with 96% airflow - noise free components - no vibrating louvers etc

+ Product Details Size - 18"w X 14"h is the size for the duct opening measurement only

designed for optimal airflow and efficiency

+ Product Details Size - 24"w X 16"h is the size for the duct opening measurement only

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

16" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 18 5/8" X 22 5/8"] w20h20 Design – Unrestricted airflow for+ Product Details Size 16"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 18 5 8" width X 22 5 8" height Actual Filter Size 15 3 4"w x 19 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.