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Actual Filter Size – 13 3/4"w x 11 3/4" x 1"
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+ Product Details Size – 25"w X 32"h is the size for the duct opening measurement only
actual front end outer dimensions are approximately 20 5/8" width X 12 5/8" height
actual front end outer dimensions are approximately 22 5/8" width X 28 5/8" height
T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 12" x 12" - 8" Collar Width_20in Actual Filter Size – 13+ 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