Health, comfort and energy efficiency are the most important objectives of a passive house design. Excellent indoor air quality is indispensable. The fresh air system performs filtration, disinfection, sterilization, oxygen supply and heat exchange for indoor areas, while supplying air for interior air purification, so that people in a room can enjoy high-quality fresh air. Improved air quality in daily life has become a major demand. Advantages of using Airflow external rotor motor powered fans for fresh air systems:

1. Compact structural design, high motor efficiency;

2. Whole-fan dynamic balanced, stable operation, low noise, small vibration, high reliability;

3. High efficiency, low power consumption;

Forward-curved and backward-curved centrifugal fans are available for customer applications, based on different requirements of static pressure.