you can connect a blower/fan to a dimmer. I just actually wired one up. I asume your talking either a slide dimmer or one of those round button dimmers. You'll need:
1. Dimmer switch
2. standered wall socket
3. about 2 feet of electrical wire rated for 15-20 amps
4. a plug to atach to the wire
5. one of those boxes to put it into.

you can buy all of this at home depot for around $30. wire it up according to the directions and you'll have your self a fan adjustment box. I'll have to post some pictures of mine later. hope this helps