I have an old fuel oil hot water heater and would like to replace it soon. Any advice on what to replace it with? I have a fuel oil boiler as my main source of heat. My debate thus far is between: 1. electricity 2. propane (get a tank and eventually convert the boiler to propane as well) or 3. possibly an indirect system. Natural gas is not an option. I have two young children, who will soon be teenagers, so I’m planning for a high demand. Any thoughts/info/advice would be much appreciated.