Fiberglass Round Gravity Relief & Intake Ventilator
Model FR Gravity Relief Ventilator is designed for providing relief for positive pressure, gravity exhaust of heat and smoke, or air intake supply. This unit is molded of tough, chemical resistant polyester resins and heavy-weave glass cloth. The simple, two-piece fiberglass housing is strong and efficient, and never needs painting.
Sizes (square throat sizes)
14 to 45.5 inches (355 mm to 1,155 mm)
Airflow to 12,850 CFM (21,832 m3/hour)
Static pressure to 0.25 inches w.g. (62 Pa)