20" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 22 5/8"] Insulated Line Set 3 * Insulation density is

3 * Insulation density is 30kgs/CBM = 0

+ Product Details Size – 10"w X 16"h is the size for the duct opening measurement only

Elevate your space with hassle-free functionality and experience superior ventilation today

High Quality – High-quality aluminum with counter-sunk screw holes (screws included) and no sharp edges

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

20" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 22 5/8"] Insulated Line Set 3 * Insulation density is+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 22 5 8" height Actual Filter Size 19 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.