Finally have my EFM coal stoker hooked up correctly ( both inlets used and a bypass installed.) My next question : Is it better to leave thermostats at one temperature constant. or does it matter if we use a programmable thermostat? We have only 2 zones. I was wondering if furnace would work less trying to maintain one constant temp. ( like 70 degrees) versus varied temps. from a programmable thermostat. ( seems like water in radiators cool off too much and furnace has to heat colder water). Any school of thought on constant versus variable temps. for coal usage or would it be about the same?
Fantastic question, I don't know the answer but I've been running my EFM 520 with programmables on two zones and I do notice it takes longer for the heat to reach temp verses oil
For our situation, we tend to like it cooler when sleeping and when the house is not occupied during working hours, so we have it lower. Unfortunately the 1st floor bedrooms are on the same loop as the rest of the main house, the 2nd floor bedrooms are on a separate loop. If the house was occupied most of the time, then I would probably leave it at one temp., then lower for sleeping hours only.
If outside temp has been constant, I do notice that we use less coal when keeping the house much cooler in our situation. This week is a good example for keeping the house at a constant temp, because of work & school vacations I'm not seeing a huge increase in ash content. Mind you if we are in a cold snap and of course my windows are over 30 years old, I think I wouldn't be able to say that....programmable is the way to go in my situation.
P.S. Do you have your bypass valves "dialed-in"? I'm still not sure what would be ideal for my setup.