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Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 10" duct openings
+ Product Details Size - 34"w X 20"h is the size for the duct opening measurement only
Upgrade to a new standard of air quality and aesthetics with our Aluminum Ceiling Diffuser
+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 30" or 30" x 10" duct opening (measured at the opening)
R value rating of insulation - r3
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
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