I just retired my stoker stove and bought a refurbished EFM 520. I understand that there are a lot of factors that play into how efficient the unit runs like how well you home is insulated, the temperature outside, type of coal, how much square footage you are heating, etc. I am interested to find out from long time users of EFM boilers what they have found out through trial and error, the most efficient settings are. My example would be, just turning the feed rate down to a 2 or 3 may not necessarily use up less coal because it has to run more just to keep the boiler at temperature. I don't know if that is a good example but I am just throwing it out there trying to let everyone know what kind of feedback I am looking for. I know there is a thread already that talks about some of this but I guess I am trying to get my mindset thinking correctly about boiler temperature, feed rate, air adjustments, etc. I have a ranch home with a semi finished basement.
I am not in the basement much so I keep the therm down to about 54 to 58. The boiler itself is in a enclosed furnace room in the basement with a door that I leave open. My main level is approx. 1400 -1600 square feet. The last couple days since the temperature has been in the 20's and 30's I have been going through almost 2 - 5 gallon buckets a day which seems high to me. Any feedback, suggesions, information you can share would be greatly appreciated.