EC fans, with high performance, efficient energy consumption, low noise level,etc., are also favored in medical industry. The manufacturers of medical ventilation equipments, such as FFUs, AHUs, air showers and clean fan coil units all retrofit their products with EC fans considering their great advantages over traditional AC fans. Apart from these medical equipments, biosafety cabinets(also called biological safety cabinets), which are enclosed ventilated laboratory workspace designed to protect the user and surrounding environment, join in the trend of applying EC fans. Xhengxin EC fans have also been adopted by customers in this field.