External Exhaust Blower - Your experience?
I priced out a Broan ventilation system with a roof mounted blower that wasn't more than an Imperial or Kobe with an internal blower. I really want a quiet exhaust system, with not more than 800 CFMs. Quiet is very important to me because of my desire to listen to music and hear the ice clink in my martini while I am grilling a steak. :-) Oh yeah, my hearing is starting to go too.
If you have an external exhaust what issues did you run into during installation? Are there long term issues to consider? I live in Wisconsin, so I would be worried about the motor freezing up during winter.