Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 12" Vent Connection Fixed Blades with Damper if your hole is 20"

if your hole is 20" wide by 14" tall

Actual Filter Size – 23 3/4"w x 11 3/4" x 1"

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allowing you to take control of indoor air circulation without complications

Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 12" Vent Connection Fixed Blades with Damper if your hole is 20"+ Product Details Size 24"w X 24"h. 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 Dampers" for precise airflow control. For 12" Round Duct Opening Spiral or Flex High Quality No sharp surface edges. Just run your finger along the edge of the top plate and youll find a smooth finished surface. Installation Location Ceiling. Design Easy unrestricted air flow for your