It has an optional water coil and/or an optional water reservoir. We are getting the coil to attach to a tank w/ 2 heat exchangers....one to feed infloor heat to supplement or replace the geothermal system and one to attach to a future source...solar or boiler or whatever.
I love it.
Best bread I ever baked was on a wood-fired mud brick oven in NM at altitude, but the second best was on a store-bought cast iron wood stove that was pre-civil war.
Modern cooks mainly wouldn't have the patience to deal with it, but it sounds like yours found a good home.
All day pork roasts... all day beans... mmmmm. And heat for the house, besides.
/johnny