Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 8" Vent Connection w30h30 + Product Details Size –

+ Product Details Size – 20"w X 40"h is the size for the duct opening measurement only

this thermostat guard is compatible with most standard thermostat models

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height -

actual front end outer dimensions are 15

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

Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 8" Vent Connection w30h30 + Product Details Size –+ Product Details Size 24"w X 24"h is the drop ceiling HVAC supply grille size for T Bar lay in. Airflow Easy unrestricted airflow for your HVAC system. Installation Location Ceiling. Design These are specially sized to fit into all drop ceilings, 24"x 24", also called T Bar systems. Can be hooked up with our Butterfly Dampersfor precise airflow control. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed.