Product review (4 stars): Hold on to your hat (Not).
I picked this heat powered fan because it had the highest air movement rating.  I believe it was rated at 350 cf/m (or maybe 3 cfm).  I don't know how they measured it but if you put a burning match in front of it, it won't blow the march out but will wiggle the flame.  I'm not disappointed because I didn't expect much.  If you want air movement get a real electric fan.  Other wise it makes an interesting thing to talk about.