We built our house four years ago and the builder installed a Quadra-fire 7100. We have had continuous problems with it. The problem has always been creosote buildup even though we get it cleaned once if not twice a year. We have heard from where it was purchased, you are not running it hot enough and the wood is not dry. Both have no impact. We are burning two year old wood which had been under cover so not getting wet. Last night the creosote on the roof of the insert caught fire. I was about to call the fire department. I shut it down and it finally went out but left me very anxious. I have had a chimney fire years ago and it was very scary. These should be recalled.