Hey Eric or anybody else, I want to add a domestic hot water coil to my logwood (wood coal boiler). This is unit is hooked in parallel to my burnham oil boiler. I want to heat my hotwater tank during the heating season. I want the electric to be standby and used only in the summer. How do I set this up with out getting the water tank to hot and causing the electric element thermostat to keep tripping off. I know I have to use a tempering valve and an anti scold valve. How do I make this all work together? I do not want to cause problems with the hotwater delivery (wife will kill me).