I was expecting something a little more heavy duty and sturdy something that was more well built ,this fan does not live up to its description or the pricetag I have a heavy duty fan that I purchased over 5 years ago 18 in I paid half the price and it is twice as powerful as this fan and and the frame is steel made as well as the blades not so with this fan cheap unstable plastic this fan should not be listed as industrial strentgh. The only plus with this fan is the design, but that is not worth the price tag. If you are looking for a truly powerful fan save yourself some money and go with a heavy duty fan .