Plenty of soot in the exhaust would be an understatement....THEY won't budge on the venting,say its according to their experts, the same way they would have run the exhaust. I think I am going to have someone else make some minor changes for me. I can't budge that vent outside,but I think its necessary also.At least one of the 45's. The new stove appears to be doing well although the flame isn't like the picture perfect harman flame. I have to try different settings I suppose. Thank you all... Posted my thanks to all of you in another topic...the giving bad advice one. Without all of your help I probably would still have that piece of crap machine.