36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in Traditional HVAC systems were designed

Traditional HVAC systems were designed for cold air

actual front end outer dimensions are approximately 16

+ Product Details Size – 8" x 22" or 22" x 8" is the size for the duct opening measurement only

Effortless Integration: Crafted for easy connection to supply grilles of drop ceiling T-Bar vent covers

36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in Traditional HVAC systems were designed+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 6" OR 6" x 36" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 5. 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