20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe Ideal for Walls & Ceilings: Suitable for all AC 8in diameter 12125SDCLNGBX

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 12" duct openings

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 32" OR 32" X 14" duct opening (measured at the opening)

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

Traditional HVAC systems were designed for cold air

20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille 8" Round Duct Pipe Ideal for Walls & Ceilings: Suitable for all AC 8in diameter 12125SDCLNGBX Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 12" duct openings + Product Details Perfect Fit & Easy Sizing Designed for a 14" x 32" OR 32" X 14" duct opening (measured at the opening)