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

+ Product Details Size – 14"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 34" x 36" or 36" x 34" is the size for the duct opening measurement only

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

This thoughtful design ensures optimal air circulation for your HVAC system

Actual Filter Size – 29 3/4"w x 13 3/4" x 1"

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