Roof Mounted Power Exhaust Ventilator is designed to extract hot air at an extremely fast rate, and exchange it with cool gusts. The Power Exhaust Ventilator is provided with throat and dome that encourages speed and effective exhaust. The Power Exhaust Ventilator greatly reduces backpressure on the fan and motor. The Roof Mounted Power Exhaust Ventilator features thermostat control and electronic motor for enhanced performance.