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Gravity Relief / Intake Ventilator


The GRV Gravity Relief/Intake Ventilator is a low silhouette spun aluminum gravity ventilator designed to match the appearance of spun aluminum power roof ventilators. Provides natural gravity ventilation and may also be used as an intake if sized properly.

Sizes (impeller diameters)

  • 9 to 48.3 inches (230 mm to 1,230 mm)


  • Airflow to 25,100 CFM (42,600 m3/hour)
  • Static pressure to 0.375 inches w.g. (90 Pa)