Hey guys, I recently purchased a Quadrafire 1800i insert second hand. I installed it myself using a 6" adjustable 90* (at approx 45*) going to a 15' long 6" stainless chimney liner topped with a china hat. The stove can be difficult to light, but once burning, burns well and produces good heat. The issue I think I have is when the door is open when adding more fuel, smoke bellows out of the stove and fumigates the entire house. I removed the baffle and inspected the Kaowool blanket and all appears to be in good condition. There was no change in the stove operation after the baffle inspection. Is the smoke bellowing out of the stove a normal conditon? We had wood burning stoves when I was growing up and I don't remember them smoking out the house like this unit does.