10" x 28" or 28" x 10" Cube Core Eggcrate Return Air Grille 10" Round Duct Pipe + Product Details Operating Temperature

+ Product Details Operating Temperature From -40°F To +248°F [-40°C To +120°C]

Actual Filter Size – 31 3/4"w x 35 3/4" x 1"

actual front end outer dimensions are 22" width X 6" height

R value rating of insulation - R3

Installation Location – Suitable for both sidewall and ceiling installation

10" x 28" or 28" x 10" Cube Core Eggcrate Return Air Grille 10" Round Duct Pipe + Product Details Operating Temperature+ Product Details Size 10" x 28" or 28" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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