14" x 34" or 34" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size -

+ Product Details Size - 4"w X 22"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 21 3/4" x 1"

Durable Construction – Made from high-quality

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

14" x 34" or 34" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 34" OR 34" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 33. 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