22" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum Adjustable Curved Blade Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 10" duct openings

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 36" OR 36" X 14" duct opening (measured at the opening)

Our coils have a very high PSI burst pressure

Actual Filter Size – 29 3/4"w x 29 3/4" x 1"

22" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum Adjustable Curved Blade Ideal for Walls & Ceilings:+ 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