14" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 16 5/8" X 32 5/8"] ceiling Noise free components - no

Noise free components - no vibrating louvers etc

+ Product Details Size - 20"w X 14"h is the size for the duct opening measurement only

And The Cooler Air From Outside WIll Flow In From The Bottom

+ Product Details Size – 14" X 4" is the size for the duct opening (floor/vent hole) measurement only

actual front end outer dimensions are approximately 36 5/8" width X 22 5/8" height

14" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 16 5/8" X 32 5/8"] ceiling Noise free components - no+ Product Details Size 14"w X 30"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 16 5 8" width X 32 5 8" height Actual Filter Size 13 3 4"w x 29 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.