20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 background-color: #000

background-color: #000

actual front end outer dimensions are approximately 32 5/8" width X 22 5/8" height

const dd = dt

75" width X 33

3 * Insulation density is 30kgs/CBM = 0

20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 background-color: #000+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 19. 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 Made from