Ningbo Tianchao Ventilation Facilities Co.,Ltd., is a professional cross flow fan manufacture which located in Sibei Industrial Park,,Yuyao city,China.Our company has ten years' experience of developing cross flow fan,there is a strict quality team.the timely service,best quality,good reputation,special originality are ours target.There is a good partnership of our company and some well-known universities.such as Shanghai Jiao Tong University,Xi'an Jiao Tong University,Huazhong University of Science and Technology and so on.we got ten technological patents in recent years,there are so many kinds of cross flow fan of our company,the diameter from 25mm to 150mm,the length from 20mm to 1200mm,the smaller and the longer cross flow fan's production is a new project of our company.our cross flow fan is wide-using on fireplace,microware oven,coal-scuttle,roaster,air-conditioning,heating apparatus,the annual output is about 1.5 million.Yuyao Tianchao Ventilation Facilities Co.,Ltd., has passed ISO9001-2008 quality system certification,and our products have been approved by many certificates,such as ROHS,TUV,UL,CCC,CUL,VDE and so on.We have a good managerial team ,good quality control team,good production division and an advanced laboratory in our company,so that we can supply best products to our cutomers.Welcome to our company and a pleasent cooperation will be appreciated.thanks.