20" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w6h6 + Product Description This aluminum

+ Product Description This aluminum flex duct is intended to be used in heating

actual front end outer dimensions are approximately 34 5/8" width X 22 5/8" height

+ Product Details Size - 30"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 19 3/4" x 1"

actual front end outer dimensions are approximately 27 5/8" width X 38 5/8" height

20" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w6h6 + Product Description This aluminum+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 22" OR 22" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 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