22" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 + Product Details Size -

+ Product Details Size - 36"w X 18"h is the size for the duct opening measurement only

Insulation density is 30kgs/cbm = 0

+ Product Details Size - 16"w X 12"h is the size for the duct opening measurement only

ensuring it arrives at your home in perfect condition

22" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 20" OR 20" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 19. 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