36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 30" OR 30" x 22" duct opening (measured at the opening)

actual front end outer dimensions are approximately 20 5/8" width X 18 5/8" height

+ Product Details Size - 16"w X 16"h X 2"d (for duct opening measurement only)

+ Product Details Size - 32"w X 30"h is the size for the duct opening measurement only

angle the louvers up for efficient cooling

36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 + Product Details Perfect Fit+ 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