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Hooded Tubeaxial Roof Ventilator,
Direct Drive


The THD Hooded Tubeaxial Roof Ventilator is designed to provide cost effective, general-purpose ventilation of commercial buildings and features a removable galvanized steel hood for cleaning purposes. The THD is available in exhaust or supply configurations.

Sizes (impeller diameters)

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


  • Airflow to 36,400 CFM (61,800 m3/hour)
  • Static pressure to 1.5 inches w.g. (370 Pa)