20" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter Actual Filter Size – 15

Actual Filter Size – 15 3/4"w x 25 3/4" x 1"

or office environments

12" x 8" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

+ Product Details Size – 18" x 24" or 24" x 18" is the size for the duct opening measurement only

20" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter Actual Filter Size – 15+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 32" OR 32" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 31. 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