32" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w36h36 so you are not left

so you are not left with much waste

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 22" Or 22" x 34" duct opening (measured at the opening)

High diffusion induction rates result in rapid temperature and velocity equalization of the mixed air mass well above the zone of occupancy

actual front end outer dimensions are approximately 20 5/8" width X 34 5/8" height

+ Product Details Size – 14" x 24" or 24" x 14" is the size for the duct opening measurement only

32" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w36h36 so you are not left+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 26" OR 26" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 25. 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