28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 Design – This airflow control

Design – This airflow control component are made to connect to HVAC diffuser and restrict airflow

complete with a supplied key

Operating from -40°F to +248°F

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

We pride ourselves on offering top-of-the-line products that meet the highest standards

28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 Design – This airflow control+ 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