26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille Grille } /* MORE SPACE BETWEEN

} /* MORE SPACE BETWEEN ACCORDIONS */ #hvac-product-accordion

actual front end outer dimensions are approximately 16 5/8" width X 18 5/8" height

+ Product Details Size – 10" x 16" or 16" x 10" is the size for the duct opening measurement only

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

actual front end outer dimensions are approximately 18 5/8" width X 26 5/8" height

26" x 28" or 28" x 26" Cube Core Eggcrate Return Air Grille Grille } /* MORE SPACE BETWEEN+ Product Details Size 26" x 28" or 28" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 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