Pete,

Yes, the loudness is the one issue I am not happy about. However, they are in the same room with two parrots and you usually can't hear yourself think anyway. I figure its one of those things that I will eventually get used to and will fade into background noise eventually. I don't know that there is such a thing as a quiet 100 cfm fan.

I came home for lunch and it looks like they have at least doubled my evaporation rate. Of course that may have something to do with the low humidity we are experiencing right now.
The humidity was 30% yestreday. That's more like winter weather than what we normally get this time of year.

Gary