20" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Experience enhanced indoor comfort with

Experience enhanced indoor comfort with our 6" Butterfly Damper

+ Product Details Size – 22" x 30" or 30" x 22" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 32" OR 32" x 30" duct opening (measured at the opening)

+ Product Details Size - 25"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 12"w X 18"h X 2"d (for duct opening measurement only)

20" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Experience enhanced indoor comfort with+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 15. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum