In order to make the air volume, energy efficiency and other key performance parameters of Bigherdsman Fan more objective, authentic and accurate, our company had an official test on the 36’’ and 50’’ fans with centrifugal system in November, 2008.

The test organization is Key Laboratory of Agricultural Engineering in Structure and Environment which belongs to the Ministry of Agriculture, the People’ s Republic of China. It lies in China Agricultural University and was commended by Bass Lab of Illinois State University in America which is the most authoritative lab in air flow testing in the world. The lab brought in the most advanced equipment in the world from the Bass Lab for air flow testing. So it has the same qualification as the Bass Lab. The data from each lab can be approbated by each other.

The data are as follows:

At present the testing results have come out. After comparing with the others, the main parameters of these two types of Bigherdsman Fan excelled the corresponding models of fan which is a well –known international brand. Our technical department will take this opportunity to continue to increase R&D innovation, and introduce more advanced fans to the market constantly.