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actual front end outer dimensions are approximately 52 5/8" width X 22 5/8" height -
+ Product Details Size – 20"w X 25"h is the size for the duct opening measurement only
+ Product Details Size - 22"w X 24"h is the size for the duct opening measurement only
angle them down for effective warmth distribution
making it a reliable choice for improving indoor air quality
18" x 36" or 36" x 18" Cube Core Eggcrate Return Air Grille Round Damper Ring actual front end outer dimensions+ Product Details Size 18" x 36" or 36" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" X 37. 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