Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 2 Coned - 24" x 24" - For 12" Vent Connection - Black Insulated Line Set + Product Details Size –

+ Product Details Size – 14" x 20" or 20" x 14" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 28 5/8" width X 20 5/8" height

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+ Product Details Size - 6"w X 14"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 26" OR 26" x 20" duct opening (measured at the opening)

Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 2 Coned - 24" x 24" - For 12" Vent Connection - Black Insulated Line Set + Product Details Size –Drop Ceiling HVAC Supply Grille For T Bar Lay In 2 Coned 24" x 24" For 6" Vent Connection Black These are specially sized to fit into all drop cielings, 24"x 24", also called T Bar systems. Can be hooked up with our "Butterfly Dampers" for precise airflow control Why HVAC Premium? You may think of grilles and registers as a generic component of the ventilation system in your house. But they are also the most visible representation of you air system.