8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille Insulated Line Measure the size of the

Measure the size of the vent opening

actual front end outer dimensions are approximately 28 5/8" width X 36 5/8" height

powder-coated finish adds a touch of elegance while also being scratch-resistant

+ Product Details Size - 14"w X 4"h is the size for the duct opening measurement only

Design – Removable frame for easy filter change & cleaning - uses a 1" thick filter

8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille Insulated Line Measure the size of the+ Product Details Size 8" x 18" or 18" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 19. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing