34" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter even without needing to remove

even without needing to remove the thermostat

+ Product Details Size - 14"w X 14"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 34" duct opening (measured at the opening)

professional look

75"H – fits a 12" X 12" duct opening

34" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter even without needing to remove+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 30" Or 30" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 29. 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