It's electric powered and uses a thermostat and humidistat control to help prevent heat and moisture buildup inside the attic.
Installed in the gable end of the house, the Gable-Mount Ventilator operates 30% more quietly than comparable units and with 35% greater efficiency. What's more, since many homes already feature a gable or vent, it may not be necessary to cut a hole to install the gable-mount ventilator.