I thought this was never supposed to happen? The truck mechanic and I were talking yesterday about his pellet stove and he said he scored a good deal on some softwood pellets this summer and stocked up with 6 tons of them. This morning he came in and said he had a pretty good chimney fire last night, needless to say he is not happy. He has a S/S liner and is a volunteer fireman so he knew what to do and had no damage, the liner was glowing though. He said he just cleaned everything up a week ago, he is not a happy camper.
Strange one most if not all of them pellets stoves have a ash collection box inside the stove next or by the exhaust fan
where the ash ends up where you have to Vac it out along with brushing out the heat exchange tubes most of them chimney pipes are triple wall or at least double wall.
I burn one for a few years never had much ash in the chimney in the tee I had on it there was a clean out cap turn and
dump ash out then brush but very little would make it outside most of it stayed in the collection box and the heat exchanger tubes once a week had to clean them out 1/4" of ash would take 50% of the heat output away Pellets are not clean by far and the quality is all over the place .