Through-flow blowers make double use of a single stream of blower airflow by channeling that flow over the motor and electronics for cooling. Through-flow blower benefits include simplicity and a compact design. Bypass blower benefits include higher performance and cooler working-air temperature as well as cleaner air through the motor space. Dedicated airflow to the motor and drive also improves thermal management so the blowers can output higher torque-speed values. Running at cooler temperatures also extends life.