24" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Size –

+ Product Details Size – 20" x 20" is the size for the duct opening measurement only

5" - SEE BELOW IN DESCRIPTION How To Measure A Grille

Installation Location – Sidewall and ceiling

Every grille has a front end frame

+ Product Details Size - 32"w X 26"h is the size for the duct opening measurement only

24" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 23. 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