20" x 24" or 24" x 20" Cube Core Eggcrate Return Air Grille Color_Red Oak + Product Details Size –

+ Product Details Size – 12" X 4" is the size for the duct opening (floor/vent hole) measurement only

and brown – to harmonize with your interior theme

For enhanced airflow control

+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

this grille boasts a sleek frame that ensures a refined and seamless look

20" x 24" or 24" x 20" Cube Core Eggcrate Return Air Grille Color_Red Oak + Product Details Size –+ Product Details Size 20" x 24" or 24" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 25. 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