But then I thought about the heat being lost in the interior of the house framing where it was not doing anything useful. I make hot water with an indirect fired tank served by a zone valve from my boiler. I already had a switch in the tank thermostat line at the top of the basement...
Hot Water Boiler Piping Zone Valves -Boiler piping zone valves are used for zoning hot water systems where multiple zones are needed. Hot water system zoning can also reduce energy cost becausehot water heatzones which are not needed can be shut down thereby reducing boiler runtime to provide ...