T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 12" x 12" - 8" Collar Copper Coil + Product Details Size -

+ Product Details Size - 34"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 9

actual front end outer dimensions are approximately 20 5/8" width X 22 5/8" height -

actual front end outer dimensions are approximately 24 5/8" width X 22 5/8" height

+ Product Details Size – 8"w X 20"h is the size for the duct opening measurement only

T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 12" x 12" - 8" Collar Copper Coil + Product Details Size -+ Product Details Size 12"w X 12"h. These are specially sized to fit into all drop ceilings, also called T Bar systems. Can be hooked up with our "Butterfly Dampers" for precise airflow control. For 8" duct opening High Quality Heavy gauge all steel construction. Installation Location Ceiling. Design These Supply Diffusers with integral round necks are recommended for heating, ventilating and cooling. Round neck to square face construction results in