I've been using this fan 24 hours a day since May 2014 during the 3-4 warm summer months here in Colorado - it sits on a windowsill at one end of the living room and is cool mountain streams the air through the house quite well with no noticeable noise even when I sleep in the same room at night. Now that my older Sheltie is sleeping more and spending more time indoors, I've given him a fan to keep the floor cooler (he has so much hair!). So I came back here to order a second window sill fan. The front panel is easy to remove for cleaning (screws won't get lost), there are no cheap knobs to break or fall off (the back of the fan rotates to 3 positions: off, 2 and 1). Lasko has always been my favorite brand of heaters, now they are popular with summer fans too. It's hard to imagine how something so light, so quiet, so easy to maintain, and so inexpensive could be so well made and last (and work) 4 years. Every other cheap window sill sized fan I had had stopped working after one summer.
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