[Toymeister]

I have a quiet cool, although an attic vent version of it. Quiet fools use dc motors and clock in at 50 to 100 watts vice the 360 of a standard psc motor driven fan.

While I can't directly answer your question, I am fairly confident that the average reader of this forum has no idea of how much that extra 260 watts cost for as many hours as these run. Based upon cost savings alone I recommend the qc.

It's pretty easy to calculate, basically your saving 3 cents an hour for every hour it runs over a cheap fan.