T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 12" x 12" - 8" Collar 18" Round Duct Pipe Actual Filter Size – 33

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

actual front end outer dimensions are approximately 18 5/8" width X 24 5/8" height

positioning supply and return grills accordingly

+ Product Details Size – 8"w X 30"h is the size for the duct opening measurement only

+ Product Details Size – 22"w X 12"h is the size for the duct opening measurement only

T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 12" x 12" - 8" Collar 18" Round Duct Pipe Actual Filter Size – 33+ 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