14" x 18" or 18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe Actual Filter Size – 24

Actual Filter Size – 24 3/4"w x 15 3/4" x 1"

Heat Pump And Centralized Air Ducted Units

actual front end outer dimensions are approximately 27 5/8" width X 30 5/8" height

+ Product Details Size – 8" x 12" or 12" x 8" is the size for the duct opening measurement only

14" x 18" or 18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe Actual Filter Size – 24+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 18" OR 18" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 17. 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