14" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated + Product Details Size –

+ Product Details Size – 24"w X 14"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 32"h is the size for the duct opening measurement only

This simple adjustment reduces HVAC strain

+ Product Details Size - 36"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 20 5/8" height

14" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 8" or 8" x 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 7. 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