Hello,
I would not suggest shutting the unit down at the end of the day. With a boiler unit, it takes awhile for the system to reheat and it would use much more fuel to do so. If you turn the heat down at the end of the day , it would take a shorter time to recover. If this is a cast iron boiler, it should last you a long time, and this type of radiant heat, is the most efficient type of heat there is. When the thermostate has reached temperature and the boiler is shut down... heat still continues from the pipes and it is a very even heat also.
