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Upblast Tubeaxial Roof Ventilator,
Direct Drive


The TUD Upblast Tubeaxial Roof Ventilator provides cost effective, general-purpose ventilation for commercial buildings. The TUD includes a heavy-duty, galvanized steel stack cap with butterfly dampers to discharge air upward and prevent recirculation into the building. A splash guard located over the damper pivot area protects against rain entry.

Sizes (impeller diameters)

  • 14 to 48 inches (355 mm to 1,220 mm)


  • Airflow to 39,100 CFM (66,400 m3/hour)
  • Static pressure to 1.5 inches w.g. (370 Pa)