I plan on installing a dv gas fireplace in my basement once I refinish it. I have a window (actually old coal chute) that I want to use to vent it. I came across the above unit for sale. Looks nice. Any info on this? Would it work for me? What would be a good price for a used unit, and what should I expect to pay for the vent and whatever else is required for install? There would be a foot or 2 vertical run, a 90, and maybe 5' horizontal.