I like Lasko fans a lot, they are generally built more solid than Honeywell fans and are more expensive because of it, but I'm often cheap. I have a Lasko tower fan that I use for my house that I love.I just ordered a lasko 40" fan for my 4x4, pretty hyped about it, this is my favorite fan solution for a tent of this size so far. There are tons of good commercial fans for big spaces but the tent options suck so bad! Janky 6" clip ons that either barely push air or slip off easy, oscillating fans that die in less than 6 months, etc. Some of these towers would be fine standing up too, but I love the idea of hanging them on the side.