I've got to stop falling asleep reading this forum. What do you all think about the possibility of getting a significant secondary burn into the oil gun port of an old Multi-fuel HS Tarm OT50 from my Seton180. I chose the Seton to be a biomass burner with it's large door and tons (literally) of refractory permitting the fire to achieve high enough temperatures for complete combustion. I have access to lots of pallet wood. The problem with burning it is -- that it is too volatile. Sparke is working on on a secondary air intake for his greenfire, which I think will be a big help, but still wonder if I can get complete combustion? I think a secondary burn with properly controlled air would be optimum. A controllable draft induction would be necessary. I need to contact NoFossil about the possibility of a New World lambda controller. My unknown is -- can I ignite and maintain a secondary combustion from the cooled flue gases from my Seton? I think I'll try a catalytic converter first to prove the idea, than source some ceramic for the bottom of the Tarm should I be able to maintain a steady burn in the CC. I probably will have to add a propane ignitor as well to jump start the process. The other aspect I like about this idea is the Tarm holds 90 gallons of water, if I separate the seton hx and the Tarm from my 1000gal storage and load(home) to maintain optimum temperatures for combustion and heat exchange, should cut down on hx cleanings. What da ya think? Am I crazy or inspired? :coolsmile: