There are so many possible combinations of heating, I couldn't really find my combination so I decided to start a new thread. here is the deal: I have a weil mclain 100,000 btu boiler with three zones set up. one for the upstairs, one for the down stairs, and one for the 41 gallon boilermate. All of this is located centrally downstairs and the main living area is upstairs. the house is about 2800 square feet with half upstairs and half downstairs. I also have a wood stove downstairs. without the wood stove burning, I hear the boiler kick on and off constantly all day. With the wood stove burning the house stays well above the kick on temperature for the boiler, but I assume it is trying to keep that 41 gallons of water in the boilermate warm. if I leave the boilermate turned off, I never hear the boiler turn on, and the internal boiler temp drops big time. my first thought was to get rid of the boilermate and put in a toyotomi 0m-148 for my domestic hotwater supply, but then I thought maybe I should get rid of the whole setup and just get a om-180 to act as a hydronic heater as well as for my DHW. I am wondering if the toyo can keep up with my heating needs. does anyone have any thoughts on any of this? Thanks for any and all info!