In recent years, although governments have made some improvements in air environmental governance, the demand for high-quality air in living environments has still not been met. 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 Dunli external rotor motor powered fans for fresh air systems:
1. Compact structural design; 
2. Whole-fan dynamic balanced, stable operation, low noise, small vibration, high reliability; 
3. High efficiency, low power consumption;
4. Tapped speed regulation (AC) and stepless speed regulation (EC);
Forward-curved and backward-curved centrifugal fans are available for customer applications, based on different requirements of static pressure.