As your area is periodically subject to freezing weather, either drain the boiler system completely or put antifreeze in the boiler system. Drain the domestic water heater so that will not break. Put trailer antifreeze in the toilet bowls and drain all the lines.
OR
Leave the heat on and get someone to check that it is working or call for repairs if it is not working during the winter with the thermostat set to 55F. Drain the domestic water heater and the water lines, as standing water can breed disease.
http://www.heatpro.info heat/cool right-sizing
The Senate and House can not find a suitable health plan for the nation; they should open their own exclusive health plan booklet and start reading.