Jimbo
Plumber
I appreciate the comments by Soxfan, but I stand by my personal choice to go with minimum 10 changes per hour. Yes, overdoing it has an energy impact, removing heated or cooled air. But in my temperate climate, where neither heating or air conditioning run most of the day, I will sacrifice the energy for the sake of much improvement in the mold/mildew/odor situation. And I do opt for as low sones as budget will reasonably accomodate. Never more than 1 sone. Higher noise, and folks, take my wife.....please!........tend to not run the fan at all.