16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood Installation of the vents will

Installation of the vents will eliminate the need to raise the door ensuring security and constant air flow and reduced heat transfer into attics and adjacent house walls

8" Diameter Is The Size For The Duct Opening Measurement Only

simplifying maintenance

Actual Filter Size – 9 3/4"w x 33 3/4" x 1"

16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Grille Color_Red Oak Wood Installation of the vents will+ Product Details Size 16" x 18" or 18" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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