14" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 Actual Filter Size – 13

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

Design – Removable face for cleaning and access to damper - wooden damper for airflow shutoff control

This simple adjustment reduces HVAC strain

By means of the smooth surface

14" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 Actual Filter Size – 13+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 13. 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 Made from