We are in a rural area and do not have access to natural gas. We are currently burning wood and will soon (if I can convince the other half to get in gear) be using a pellet stove. We heat our hot water with our oil boiler. I want to keep our oil boiler for backup in case we run out of wood and the cost of pellets skyrockets, but think that it is not really economical to use now just for heating hot water. Would there be a more economical way to heat hot water? Also, someone told me that our pipes in the hot water heating system could be damaged if we don't turn on the furnace periodically. Any opinions? Thanks.