I left home this morning for 3 days. When I jumped in the shower today.. My tanks were about 180. Not a lot of room there. I filled the firebox about half full anyway. It was still going strong in the 185 or so range when I left. My wife reports that the tanks are 197 top and bottom now.. 10 hours later. Obviously... the boiler is idling. SO.. I know idle isn't ideal for efficiency sake. I know the vigas starts the fan every hour or so to keep the coals alive. Obviously... my tank and pipe insulation is pretty good. I'm sure the weather tonight will be cold enough to need some heat, not to mention DHW use. I did it just to try and see if it would supply the heat thru the 3 days. Lately it's been going about a day and a half between burns, but I bet I could have squeezed 2 full days out of it. Thoughts?