this is the third Vornado 'air circulator' I've owned. The first two I purchased in 2013, plugged them in and let them run 24/7 for the next eight years. My apartment is a one bedroom & w/two Vornado 733's I can get away w/one 240v AC in the summer getting pushed thru the entire unit. Same in the winter, the air circulators are elevated pushing the warm air through the house. One of the two I purchased in 2013 is still kicking the other just quit spinning one day so I bought another (asap). When i get the time I'm going to try to bring that Vornado 733 back to life. . it may run another eight years.