22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 25 3/4" x 1"

actual front end outer dimensions are approximately 18 5/8" width X 34 5/8" height

or commercial environments

+ Product Details Size – 22"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 14 5/8" height -

22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 33+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 28" OR 28" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 27. 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