US Patent 11175056 Smart attic fan assembly

An attic fan assembly and method for efficiently cooling an attic is provided. The assembly includes a motor, a fan blade assembly, a control unit, a condition sensor, and a speed sensor. The control unit receives a condition sensor signal from the condition sensor and determines a target speed. The control unit receives a speed sensor signal from the speed sensor and determines a present speed. The control unit sends a motor signal to control speed of the motor according to the conditions of the target speed and the present speed.