UPDATE June 30, 2015: Purchased this on July 9, 2012. And 4 more shortly there after. The fans are still working great after 3 years of consistent use. In the summer time, they are on consistently from 9:30am to 6:00pm, 6 days a week. One seems to have slowed down on the lowest setting, but it has three settings so it is no problem. Air condition technician told me to strategically place the fans where the cold air will escape the most (e.g., by the door) and it has worked great in keeping the cool air in. The fan is very loud on the highest setting, but it is also very strong. Also research how much energy it takes to run a fan all day. Go this website: http://energyusecalculator.com/electricity_ceilingfan.htm . It is not much, like less then 20 cents a day or something like that depending on what setting you use it. The wattage of this fan runs 85, 76 and 64 watts depending on the setting;I have a 4,000 + square foot retail store. The building is old and with customers continuing to open and close the doors, the cold air escapes pretty easily so it is difficult to cool down the store. I bought one unit to try out. The fan feels solidly built and it comes with instructions on how to install. It has a handle to where you can hang it or bolt into certain things and it also comes with a cable wire. I just hung it from three slatwall hooks on a slatwall. The unit is solidly built to where it feels heavy, but not too heavy. It has three speed modes which is controlled by the pull of a chain. I put it right by the main duct way where the cold air blows out and instantly the area around there became colder faster. I ordered three more units and placed one by the door and the others strategically placed. The store is now significantly colder, faster. There is not that much more significant noise in my opinion and I hardly know it is on. Good fan over for commercial areas, workout areas, garages, and such.