titleist1, that's a good idea about placement. Unfortunately, I don't really have a good place to put this boiler that will work with the current SS chimney and that would also be a good place for a new, potential, masonry chimney in the future. I think I'll simply have to do what was suggested and install a T for an annual cleaning. But thanks for an excellent idea!
McGiever, I'm hoping you're right on all counts.
I discussed this with my dealer and he showed me a section of "Class A" (as he called it) chimney in his workshop - it looks just like my chimney. He said a "Class A" chimney is top quality and he thinks its gonna be fine. Just keep it clean. BTW, Keystoker responded to my email and I spoke with them today too. They seem to be great people and very helpful! They said that a manometer is not a requirement. Does anyone have thoughts on the usefulness of a manometer for this boiler install?
Keystoker also agreed that "the existing chimney would be perfect for the coal boiler as it doesn't get hotter then 300 degrees." He did say that corrosion will likely be an issue eventually, but I'm hoping with proper maintenance, it'll be a long time from now.
He also gave me some info I couldn't find elsewhere on this forum. Figured I'd share it in case anyone else was wondering:
The Keystoker KAA-4 boiler has a shipping weight of 800lbs (on a standard pallet), but the boiler ships unassembled, so the largest piece (the boiler itself) is about 650lbs. This is a lot less weight than I was expecting. My dealer thought it was maybe 1200lbs.
Looking for good deals on a tractor trailer load of bagged rice coal now. Any recommendations?
) thru the combustion chamber. This leads to excess heat going up the chimney instead of it being transfered to the heat medium (water).
I may have to borrow one of my neighbor's big JD tractors or just remove 10+ bags from each pallet before forking it down off the truck. There is always a hurdle. 
