Quote Originally Posted by littleindiangirl View Post
A constant breeze directly on them when cool can very well get them sick. Rats do have sensitive respiratory systems, with all the dust flying around and being in a cool draft will take it's toll.

When it's very warm, I'd keep it directly on them. If it's under 80, make it oscillate.

He isn't talking about it being cool. He is talking about 80-85 degrees. When my rat room was too hot in my old place I always kept the fan blowing on the rack. Never had a problem with illness. Now if he is using a 10 gallon tank and is going to put a fan blowing directly down into it, that's another story.