The UP model is a universal plenum constructed from galvanized steel, designed for use with linear diffusers or grilles. It is available with or without internal insulation to meet specific project needs. The standard plenum height is 10.5", with standard lengths of 24", 36", 48", 60", and 70". Custom sizes are available upon request. Inlet options include 6" round, and 8", 10", 12", and 14" oval. Multiple damper configurations are offered to suit a range of airflow control requirements.