roof ventilators


Heat Saver / Ventilator, Stack Cap


The RRES Two-Way Heat Saver/Ventilator is recommended when not all of the features of the Three-Way unit are required. The Two-Way unit has a lower first cost and uses automatic (gravity) dampers rather than motor driven dampers.

Each unit is constructed with close tolerances between the propeller tips and the orifice to maintain maximum efficiency. The patented reversible, cast aluminum alloy fan impeller is secured to the motor shaft with a split taper lock bushing. The Two-Way Heat Saver/Ventilator’s rolled steel circular windband cuts down on wind resistance and is easily removable.

Sizes (impeller diameters)

  • 24 to 60 inches (610 mm to 1,525 mm)


  • Airflow to 62,100 CFM (105,500 m3/hour)
  • Static pressure to 0.375 inches w.g. (90 Pa)