So here's the dealio... I'm about to put the old Harman in on the first floor. I'm confident she'll do just fine heating floors 1&2. What about the basement? I live in an old farmhouse and my foundation is the old rubble style. Some of the foundation is underground but a good portion is above ground too as it is built into the side of a hill. I suspect that the normal 55 degrees underground rule may not apply once it gets really cold. What do you guys do? Currently the beast of an oil furnace puts out enough heat during it's daily churnings to keep the basement somewhat stable. I'm afraid with the furnace off most of the winter next year (hopefully) that I might have some issues with frozen pipes. Do you guys run 2 stoves? I was thinking that or maybe just putting some baseboard heat down there with the thermostat set at 50*. To make this thread even longer... I currently use oil as my DHW too. I plan to put a Marathon water heater in this summer and shut down the boiler completely until winter. Does this really have the adverse effect they describe online or is that all a bunch of crap to get you to buy into the oil man's line of keeping it on to keep the seals intact? It's an olllllllllld steel Fitzgibbons boiler. I would love to convert it to a cold start boiler but I fear that might TKO her for good. As much as I'd love to be run 100% on pellets, I need to keep the backup in there. Sorry for the book guys!