32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall + Product Details Size -

+ Product Details Size - 28"w X 24"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 14" OR 14" x 22" duct opening (measured at the opening)

+ Product Details Size - 30"w X 24"h is the size for the duct opening measurement only

75"H – fits a 24" X 10" duct opening

32" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 36" Or 36" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 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