26" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter + Product Details Size –

+ Product Details Size – 30"w X 6"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 26" OR 26" X 16" duct opening (measured at the opening)

+ Product Details Size – 26"w X 18"h is the size for the duct opening measurement only

of up to 300m3/h

26" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 22" OR 22" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 21. 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