Top Outlet Ceiling Diffuser Box | 6" X 6" X 4" | Galvanized Steel Metal Box Is Compatible With Duct 4" 10in diameter + How To Measure Access Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ How To Measure Access Panel Overall Size:

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

+ Product Details Size - 36"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 8"h X 2"d (for duct opening measurement only)

+ Product Details Size - 25"w X 25"h is the size for the duct opening measurement only

Top Outlet Ceiling Diffuser Box 6" X 6" X 4" Galvanized Steel Metal Box Is Compatible With Duct 4" 10in diameter + How To Measure Access Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + How To Measure Access Panel Overall Size: Actual Filter Size – 23 3 4"w x 19 3 4" x 1"