34" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Design – Fixed Hinged for

Design – Fixed Hinged for easy filter change & cleaning - uses a 1" thick filter

+ Product Details Size – 26"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 24 3/4"w x 24 3/4" x 1"

The total outer size of this grille is the listed size plus plus 2 and 5/8"

actual front end outer dimensions are approximately 23

34" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Design – Fixed Hinged for+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 20" Or 20" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 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