I changed settings this year trying to keep the fire from going out, and ended up increasing the settings from 3/3.25 to 4/4. In the end, what fixed it is lowering the timer by a minute since this years coal is much easier to burn or burns hotter, and was always hitting the hi limit of 200. I did not go back to 3/3.25, but using a lot more coal this year. The temp pegs at the high limit of 200 most of the time. Should I lower it back to 3/3.25? I did try it one weekend, and noticed it was struggling to keep it at 160 with demand for heat in multiple zones so left it at 4/4.
So is it better to run a lower setting over longer period of time or higher setting for shorter period of time (pegs at high temp) to conserve on coal usage? I am going through about .5 more tons per month with this new coal and settings. Its difficult to judge the heat usage compared to last year, but assume its similar. I used 3 tons this year so far, and last year used 7 tons in the winter.