Description
Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 10" duct openings
+ Product Details Size – 24"w X 34"h is the size for the duct opening measurement only
+ Product Details Size – 18"w X 25"h is the size for the duct opening measurement only
+ Product Details Size - 22"w X 4"h is the size for the duct opening measurement only
With a 5" diameter for the duct opening measurement
16" x 18" or 18" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 18" OR 18" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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