14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 + Product Details Size –

+ Product Details Size – 36"w X 22"h is the size for the duct opening measurement only

Elevate comfort while saving on bills with HVAC Premium's Aluminum Adjustable Return Grill

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 18" duct opening (measured at the opening)

actual front end outer dimensions are approximately 23 5/8" width X 7 5/8" height

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14" x 36" or 36" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 36" OR 36" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 35. 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