Getting used to my newly installed indoor boiler. I'm wondering if this thing is best used by ripping as big a fire as I can...or going with a smaller fire. I have the pump set to circulate at 160F...and the auto damper shut-down set to 180F. I'm not sure I really like the automatic damper...which seems to be either ALL THE WAY open, or ALL THE WAY closed. I have in mind to be as efficient with the wood as possible, but I fear this beast is going to be chugging through my woodpile. Anybody else use this model?