Fan noise (Page 2/2) Fiero_Adam AUG 02, 01:58 PM It's mainly for air circulation, but also background noise, as long as that noise is a constant. I flipped it upside down and it's fine now, but I'll probably try to take it apart. I haven't bought an industrial or heavy duty metal fan, but may need to look into that. I have bought some that were not really cheap (Vornado brand), but I guess they're still plastic.