8" BUTTERFLY DAMPER - Control Your Airflow on drop ceiling grilles of 24x24 (8" round duct opening) Material_Steel + Product Details Size -

+ Product Details Size - 32"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 12 5/8" height -

Actual Filter Size – 29 3/4"w x 19 3/4" x 1"

then you'll need a 14-inch round vent

+ Product Details Size - 24"w X 20"h is the size for the duct opening measurement only

8" BUTTERFLY DAMPER - Control Your Airflow on drop ceiling grilles of 24x24 (8" round duct opening) Material_Steel + Product Details Size -Control Your Airflow on drop ceiling grilles See our separate listing for T Bar supply grille Check Out This Asin For Matching T Bar Drop Ceiling Grille: B007CNEJZK These are airflow control components made to connect to supply grilles of the drop ceiling, the T Bar vent covers. See our separate listing of T Bar Supply Grilles. Metal Fab A brand you can trust. Some of our best features aren't readily apparent, but youll appreciate the benefits over a