Side Outlet Ceiling Diffuser Box | 8" X 8" X 8" | Galvanized Steel Metal Box is Compatible with Duct 8" 10in diameter Think of the diameter as Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Think of the diameter as a straight line from one end to the other

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

+ Product Details Size – 12" x 36" or 36" x 12" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 12" or 12" x 14" duct opening (measured at the opening)

+ Product Details Size – 22"w X 14"h is the size for the duct opening measurement only

Side Outlet Ceiling Diffuser Box 8" X 8" X 8" Galvanized Steel Metal Box is Compatible with Duct 8" 10in diameter Think of the diameter as Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Think of the diameter as a straight line from one end to the other Actual Filter Size – 33 3 4"w x 13 3 4" x 1"