36" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 3-Way or 4-Way Filter Size - 17

Filter Size - 17

actual front end outer dimensions are approximately 32 5/8" width X 10 5/8" height -

The integral multi-shutter damper with a convenient handle operator ensures that you can easily adjust the air volume

+ Product Details Size – 20" x 28" or 28" x 20" is the size for the duct opening measurement only

+ Product Details Size – 12" x 18" or 18" x 12" is the size for the duct opening measurement only

36" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 3-Way or 4-Way Filter Size - 17+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 22" OR 22" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 21. 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