This ox industrial standing fan is a very strong product that will give you the cool breeze and its noiseless when working. it can work for so many hour because the coil is made of 100% pure copper to enable it work for so many hours, its blade is made of aluminum and it does not rust.?ox industrial fan is a RUGGED fan and it last for so many years and the product meets the required standard of quality, durability and maximum utility with guaranteed optimum performance, this product is bond to meet all of your home needs.