30" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter and smooth surface for years

and smooth surface for years to come

actual front end outer dimensions are approximately 31 5/8" width X 24 5/8" height -

Actual Filter Size – 21 3/4"w x 15 3/4" x 1"

+ Product Details Size - 10"w X 10"h X 2"d (for duct opening measurement only)

Rigid Built For External Use – The sturdy and rigid design features noise-free components that eliminate vibration and excess noise to the louvers

30" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter and smooth surface for years+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 36" OR 36" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 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