12" x 18" or 18" x 12" Cube Core Eggcrate Return Air Grille 14" Round Duct Pipe customize cuts and flares as

customize cuts and flares as needed

+ Product Details Universal Fit - Accommodates almost any thermostat with dimensions of 8-1/4" H x 5-3/8" W x 3-1/2" D

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

Actual Filter Size – 27 3/4"w x 11 3/4" x 1"

12" x 18" or 18" x 12" Cube Core Eggcrate Return Air Grille 14" Round Duct Pipe customize cuts and flares as+ 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