28" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in Width vs Height

Width vs Height

actual front end outer dimensions are approximately 28 5/8" width X 22 5/8" height

A: Black Grilles Always Look Sharp And Never Show Dirt & Dust Marks

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

Installation of the vents will eliminate the need to raise the door ensuring security and constant air flow and reduced heat transfer into attics and adjacent house walls

28" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in Width vs Height+ 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