... power of general type of fan is 1100w or 1500w,but our fan is 750w.so,if you take use ... measured air volume of better quality type of fan is about 40000 cubic meters,but our fan can reach ... the rotation speed of our motor is just 450rpm,so its failure rate is very low,however,the rotation speed ... ’s “work”,and he has good temperament,what is important is that he is strong,you don't need pay too much ...