12" x 18" or 18" x 12" Cube Core Eggcrate Return Air Grille 14" Round Duct Pipe Actual Filter Size – 9

Actual Filter Size – 9 3/4"w x 13 3/4" x 1"

Filter grille features a user-friendly plastic latch that requires no screwdriver for opening

Traditional HVAC systems were designed for cold air

+ Product Details Size - 22"w X 16"h is the size for the duct opening measurement only

12" x 18" or 18" x 12" Cube Core Eggcrate Return Air Grille 14" Round Duct Pipe Actual Filter Size – 9+ Product Details Size 12" x 18" or 18" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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