Weifang Yihe Electrical Appliance Co.,Ltd. is the profession manufacturer of ventilation,cooling equipment,humidification and heating equipments biggest in Asia area.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 ...Enterprise''.Fan AAA Levels of National Quality Company Honesty and Qualitative Enterprise.The company strictly executes quality standard,and has passed ISO9001:2008 international quality system certification ,and all procedures are under strict standars or according to the customers to produce and test.