28" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 19 3/4" x 1"

Width vs Height

1/4” - 6518 PSI

+ Product Details Size - 14"w X 14"h is the size for the duct opening measurement only

75"H – fits a 16" X 16" duct opening

28" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in Actual Filter Size – 31+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 10" OR 10" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 9. 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