26" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Brown + Product Details Size –

+ Product Details Size – 8"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 18" x 32" or 32" x 18" is the size for the duct opening measurement only

Experience enhanced indoor comfort with our 8" Radial Damper

+ Product Details Size - 34"w X 8"h is the size for the duct opening measurement only

Compatible with 24x24 openings and built from durable

26" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Brown + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 36" OR 36" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 35. 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