26" x 26" Cube Core Eggcrate Return Air Grille Compatible With Duct 10in actual front end outer dimensions

actual front end outer dimensions are approximately 34 5/8" width X 18 5/8" height

Actual Filter Size – 27 3/4"w x 7 3/4" x 1"

actual front end outer dimensions are approximately 18 5/8" width X 27 5/8" height

Tamper-Proof Design – Provides robust protection to prevent unauthorized access and ensure consistent thermostat settings

26" x 26" Cube Core Eggcrate Return Air Grille Compatible With Duct 10in actual front end outer dimensions+ Product Details Size 26" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 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 electric