18" x 22" or 22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in and utility rooms

and utility rooms

Whilst the maximum pressure for R410 is 700 PSI

actual front end outer dimensions are 31

actual front end outer dimensions are approximately 38 5/8" width X 14 5/8" height -

75"H – fits a 24" X 6" duct opening

18" x 22" or 22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in and utility rooms+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 22" OR 22" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 21. 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