16" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 18 5/8" X 38 5/8"] w30h30 + Why HVAC Premium

+ Why HVAC Premium

3 * insulation density is 30kgs/cbm = 0

With a 4" diameter for the duct opening measurement

[Outer Dimensions: 10

actual front end outer dimensions are approximately 20 5/8" width X 12 5/8" height

16" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 18 5/8" X 38 5/8"] w30h30 + Why HVAC Premium+ Product Details Size 16"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 18 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 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