I have a 1200i pellet stove insert by Quadrafire. It was installed in 2003. I have noticed ash collecting on my mantel and on the top lip of the stoves door. This hasn't happened before. Today when cleaning the stove I opened the two small doors at the bottom back of the stove and vacuumed this area which is below the heat exchanger pipes. I usually do this once per season and burn a little more than 2 tons. I'm using O'malley pellets this year and think they produce more ash so maybe I fixed the problem with my more complete cleaning today. I have the original gasket on the door and wonder if it could be allowing the ash to come out of the stove onto the hearth? Thanks for your help