I went tried a hand fired boiler using a DS machine for a 1-1/2 heating season(s) . My advice is step away and purchase a new or used stoker like AHS, EFM , or Keystoker. My AHS260 outperforms the hand fed unit for heat output and gave me my life back from cutting, stacking,feeding and fussing a hand fed unit all day long. I had a bunch of trees fall from Hurricane Sandy and my neighbor came down with his buddy for the fire wood. They noticed my AHS in the shop and watched it work for for two hours in amazement and kept asking when I had to fuss with it . I said in a day or so the ash pan will need empty, they were just drooling ..