8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Grille 10" Round Duct Pipe + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 16"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 19 3/4" x 1"

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

+ Product Details Size - 12"w X 32"h is the size for the duct opening measurement only

Ring Base Design – Allows for easy installation without removing the thermostat

8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Grille 10" Round Duct Pipe + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 16"w X 28"h is the size for the duct opening measurement only Actual Filter Size – 21 3 4"w x 19 3 4" x 1"