T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 12" x 12" - 8" Collar RV Mobile Home + Product Details Size –

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

Ring Base Design – Allows for easy installation without removing the thermostat

+ Product Details Size – 25"w X 28"h is the size for the duct opening measurement only

Perfect for sidewall or ceiling installation

actual front end outer dimensions are 19

T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 12" x 12" - 8" Collar RV Mobile Home + 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