Interesting one! I have been here since the winter of 2006, which is also when I put the stove in, and I have never had the chimney swept. I burn seasoned wood and occasionally a bit of coal. It is a streight stainless steel flu that goes streight through the roof. It has always drawn very well and has one of those bird/debri thing on the top too, after a young bird and two bats got trapped in the stove one summer!

Will be interested to see how much comes out and take it from there, as I was thinking of having it swept...