international86 wrote:I've run a Keystoker A-80 warm air furnace for three winters, and have never had any problem with coal dust--either in the cellar or upstairs. If I could find fault with the Keystoker furnace, it would be the filter arrangement--the filter slides into a slot at the base of the cold air return. With this arrangement, there's no way to keep (short of some after-market mods) the furnace from drawing any dust from the cellar into the ducts through the filter slot. In spite of this, I still have no dust upstairs--coal or ash--that I can trace to the furnace. I burned wood for many a winter, and the lack of dirt it generated is a big plus to burning coal--along with the dramatic decrease in work associated with burning wood. I would highly recommend a Keystoker stove, furnace, or boiler to anyone!
...i agree .I installed a brand new Keystoker A150 this year and absolutely love it.
The air handler moves over 2000 cfm...and we get nothing in the house but heat! (no dust)
I did improve the filter tray however...simply by sealing up one side of it (filter is accessible from either side) .
I was fanatical about sealing EVERY seam in both cold and warm air ducts...
We use only bagged coal(no means to store bulk)...and its washed (our supplier says he uses "coal-spray" )...no dust....and more impotantly NO OIL ODOR!!