Yeah, I'm sure there are 220 volt units made as well. And as for the venting idea, it would be fine as long as you run a carbon filter setup before it gets into that vent. Either run a 400--or so--cfm fan going into the carbon filter and exhaust hot air from the top of the cabinet with another fan, or look into a carbon filter design that would utilize an inlet/outlet on each end so you can pull air through it------>to the vent in the wall. Either way, I just wouldn't feel safe running unfiltered air into that vent.