With the mild weather upon us after the unusual warm spell that we had last month, we of course are wishing we had storage...but we don't. So lately we get a fire going in the morning and by 9am or so the sun is maintaining a decent temp in the house so the boiler gets shut down. In early evening it's fired back up again for dhw and some heat needed until bed time. If overnight lows are above 40 we can shut her down again and still have 66-68 degrees at 6am and the routine starts again. In previous years we used the cycle timer to keep some hot coals but I thought about this routine to save a little in wood usage, but am I possibly going to have problems with the continual heat up/cool down? Water temp usually does not get below 120 in the "off" period and will get to 180+ when we fire it up again.