24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille Aluminum - Cube Core actual front end outer dimensions

actual front end outer dimensions are approximately 11

+ Product Details Size - 20"w X 6"h is the size for the duct opening measurement only

This thoughtful design ensures optimal air circulation for your HVAC system

this grille seamlessly drops into the designated place

Actual Filter Size – 19 3/4"w x 13 3/4" x 1"

24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille Aluminum - Cube Core actual front end outer dimensions+ Product Details Size 24" x 28" or 28" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 29. 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