We are the professional producer of exhaust fans. Qingzhou Sanhe Machinery Co., Ltd. is the professional manufacturer of ventilation, cooling equipment, humidification and heating equipments. It is a high-tech enterprise which has a completed set of specialized designing, manufacturing, installation, sales and after-sale services. We have gotten many titles such as 'China Ten Top Brands Fan�. 'AAA Levels of National Quality Company' , 'Honesty and Qualitative Enterprise'.