22" x 26" or 26" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 25 3/4" x 1"

please note that the total outer dimensions of the grille measure 8" in diameter

These are airflow control components made to connect to supply grilles of the drop ceiling

This Will Create A Cycle Of In And Out Air FLow

+ Product Details Size - 30"w X 25"h is the size for the duct opening measurement only

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