I use a big fan on a swiveling stool. I can reach over and change the direction of the fan - right on me for harder efforts, away from me for rest intervals.

The biggest problem for most people is staying cool on a trainer. It would be misery without my fan and my Wisconsin basement is about 60-65 degrees in the winter.

You probably need some CTS DVD's. You won't have to worry about being cold no matter how cool your room is.