The BAYCURB320A downflow roof curb is designed for use with 3-5 ton Foundation packaged rooftop units, providing a stable mounting platform that supports optimal airflow and unit stability. Built to match the specifications of Trane and American Standard models, this roof curb ensures seamless integration with new or replacement rooftop installations. The curb is constructed from durable galvanized steel and includes all necessary gasketing materials for a secure, weather-tight seal. This curb supports reliable rooftop installation, helping to reduce installation time and improve overall system performance.