30" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 32 5/8" X 18 5/8"] w25h25 This simple adjustment reduces HVAC

This simple adjustment reduces HVAC strain

and Diffusers

+ Product Details Size – 36"w X 12"h is the size for the duct opening measurement only

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R value rating of insulation - r3

30" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 32 5/8" X 18 5/8"] w25h25 This simple adjustment reduces HVAC+ Product Details Size 30"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32 5 8" width X 18 5 8" height High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and