30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter providing efficient performance of up

providing efficient performance of up to 300m3/h

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 18" Or 18" x 34" duct opening (measured at the opening)

+ Product Details Size - 6"w X 6"h X 2"d (for duct opening measurement only)

+ Product Details Size – 28"w X 30"h is the size for the duct opening measurement only

Tool-Free Access for Easy Filter Changes - Features a user-friendly plastic latch that opens effortlessly without a screwdriver

30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter providing efficient performance of up+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 18" OR 18" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 17. 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