Thx. I did read that it seems to go away after awhile, due to the residue. I doubt the fan would draw too much smoke, it would be high enough over the vent, to only pull what has already drifted up and away from smoker. I'll definitely keep that in mind.
Sarge, thank you for ur help. I'm a potential new customer, and I tend to over analyze and research ALOT, but do so, so I won't have regrets once purchased.