I can not get you the exact name of the exhaust right now, but we never have any problems when we engrave wood, but some plastics create a lot more smoke than it can take out! some of the problem is that due to budget cuts on the district level the school has cut back on the shops budget, and we are trying to make the filters last as long as possible before replacing them.
Yes the engraver was purchased a year before I was at the school, but I hear It was a pretty penny.
We use CorelDraw, I have never tried any other software, as to download any software onto the computer would take about a year of persuading the school network admins
