24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in Actual Filter Size – 13

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

ensuring compatibility with most thermostat models

actual front end outer dimensions are approximately 14 5/8" width X 10 5/8" height

actual front end outer dimensions are approximately 20 5/8" width X 26 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 36" or 36" x 6" duct opening (measured at the opening)

24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in Actual Filter Size – 13+ Product Details Size 24" x 26" or 26" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 27. 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