30" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 6in of up to 300m3/h

of up to 300m3/h

actual front end outer dimensions are approximately 18 5/8" width X 18 5/8" height

look no further than HVAC Premium

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 18" OR 18" X 16" duct opening (measured at the opening)

30" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 6in of up to 300m3/h+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 34" OR 34" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 33. 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