8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 30.5"] w22h22 Actual Filter Size – 29

Actual Filter Size – 29 3/4"w x 23 3/4" x 1"

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

Actual Filter Size – 9 3/4"w x 13 3/4" x 1"

+ Product Details Size - 34"w X 22"h is the size for the duct opening measurement only

75"H – fits a 18" X 12" duct opening

8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 30.5"] w22h22 Actual Filter Size – 29+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 28" or 28" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 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