20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper With precise measurements for seamless

With precise measurements for seamless integration

actual front end outer dimensions are approximately 26 5/8" width X 14 5/8" height

+ Product Details Size - 18"w X 34"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 52 5/8" height

including Ductless Mini-Split

20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper With precise measurements for seamless+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 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 Made from