14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 1-Way actual front end outer dimensions

actual front end outer dimensions are approximately 10 5/8" width X 8 5/8" height

we have assisted countless contractors

actual front end outer dimensions are approximately 26 5/8" width X 30 5/8" height

+ Product Details Size – 30"w X 8"h is the size for the duct opening measurement only

it integrates effortlessly into T-bar or plaster frame ceilings

14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 1-Way actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 28" OR 28" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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