This one has an auger that brings the ash straight out from the combustion chamber, and deposits it in the base of a bucket elevator that operates at a 90 deg angle from the auger. I have also seen other manufacturers (Motor Stokor comes to mind) that used the same basic set-up but with a second auger instead of the bucket elevator. I think EFM also had a paddle system for the elevator on some models (in fact, I think I have one in my garage that would go on a UFR). Maybe people who have seen other set-ups will chime in, too.
The general idea of using one auger at an angle instead of a horizontal auger and an elevator generally sounds plausible, but I would have one reservation. The burn pot on the EFM's with ash removal rotated, and had "wings" on the side that swept the ash into the horizontal auger. Any clinkers, etc. would tend to get broken up by the wings and forced into the auger. A "new" system that doesn't do that might tend to clog up, at least if it uses red ash coal.
Last edited by Pacowy
on Wed Dec 28, 2011 1:27 pm, edited 1 time in total.