32" x 34" or 34" x 32" Cube Core Eggcrate Return Air Grille Outdoor Vent Covers Think of the diameter as

Think of the diameter as a straight line from one end to the other

Control Your Airflow on drop ceiling grilles

Actual Filter Size – 11 3/4"w x 15 3/4" x 1"

Our innovative adjustable design changes the game

You may think of grilles and registers as a generic component of the ventilation system in your house

32" x 34" or 34" x 32" Cube Core Eggcrate Return Air Grille Outdoor Vent Covers Think of the diameter as+ Product Details Size 32" x 34" or 34" x 32" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 33. 75" X 35. 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