28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 + Product Details Size -

+ Product Details Size - 32"w X 34"h is the size for the duct opening measurement only

Operating from -40°F to +248°F

complete with a supplied key

actual front end outer dimensions are approximately 28 5/8" width X 18 5/8" height

875" width X 8" height

28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 30" OR 30" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 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