Hey Berlin, thanks for the reply. The original smoke pipe adapter was 9" it was adapted down to match the 6" thimble into the chimney. The chimney is 6" X6". Do you think there is any point going to an 8" pipe on that size chimney?
I brushed out the heat exchanger and flue pipe yesterday, there was quite a bit of soot in the heat exchanger, and about 3/8" on the MPD and stove pipe. My stove pipe is only 17" long and goes straight from the back of the boiler into the chimney. I clamp my brush on a broom handle and clean it out through the heat exchanger door without needing to take the pipe apart. I can even brush off the MPD.
I never burn wood and bit together, it's one or the other. I'm only burning wood because I have it, next season it's going to be all coal. I've cleaned my chimney a couple of times and have not had any creosote and only a cup or two of soot. I tried to burn the stuff I collected with a torch and all it didn't light. I find that when I burn wood the creosote condenses on the firebox walls, flakes off and burns. I think it's because my boiler temp runs so low. It's 72 in here, the boiler water is 112 and it's 10 and windy outside. Gotta love gravity feed, no pumps, no power, nothing to fail.
I came across the rating for my boiler in the Beacon boiler reference handbook but I'm not sure how it equates to btu/hr. The rating is listed as 725. I think that number is square feet of radiation, do you have any idea how to convert it?
I didn't realize how much air was leaking around the ash pit door. These old boilers didn't have any seals at all. I ran a bead of hi-temp silicone around the door's mating surface and put plastic wrap on the boiler side so the silicone wouldn't stick to it, closed the door and let it set up. Man what a difference, I have low end control like I never had before.
I'm in Cape Breton, Canada. coal selection is limited as all the mines have been closed. The coal I can get is not screened and dug from the surface. It has everything from lumps to powder to rocks and mud in it.