Honeywell works fine with the Axeman. The nest thermostat sounds like a neat gadget but with automatic coal stoker the automation is pretty well built in. Set it and forget it. The nest might be a great option if I had insulation in these walls and plenty of free time on my hands. Beauty of coal is set it and forget it but take the ash out. Only neat feature is I can see if the fire went out while I'm away from home because the temp fell off. Would be great if we could write our own programs for the thermostat. Then we could make it operate for those with two and three sources of heat in event of fire out.