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 titiles such asÃ¢ï¿½ï¿½China Ten TopÃ¢ï¿½Â¦EnterpriseÃ¢ï¿½ï¿½ . Fan AAA Levels of National Quality Company Honesty and Qualitative ***** company strictly executes quality standard , and has passed ISO9001:2008 international quality system certificaiton , and all procedures are under strict standars or according to the customers to produce and test.