36" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 + Product Details Size –

+ Product Details Size – 18"w X 14"h is the size for the duct opening measurement only

75" Width X 21

actual front end outer dimensions are approximately 30 5/8" width X 16 5/8" height -

Versatile Compatibility: Our ceiling grills aren't limited to just T bar drop ceilings

actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height

36" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 + Product Details Size –+ 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