22" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 21 3/4" x 1"

Optional Butterfly Damper Available At Asin: B007CNEL1W

+ Product Details Size – 24"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 30 5/8" height

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22" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 Actual Filter Size – 13+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 16" OR 16" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 15. 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