would your wife or who ever know how to keep the heat going?
From the heating systems that I see, I think that no one cares if it can be maintained. Around here, a fairly common set-up would have an outdoor temp sensor to control boiler flame level (or at least output temperature) with domestic water heating having priority and overriding the outdoor sensor, in-floor zones and forced air zones interlocked to prevent simultaneous heating and cooling, and in the case of potable water being used in the heating system - a circulator that moves water through the system during non-heating periods.
Boilers are generally serviced by plumbers, anyway. I only get called after they've changed all the parts and announced to the customer that it quit working after 3 years because it was wired wrong.
