Much better turning excess heat into steam to drive a turbine or flywheel than this. If you have a large water tank you can store heat for days to keep a house

Much better turning excess heat into steam to drive a turbine or flywheel than this. If you have a large water tank you can store heat for days to keep a house warm. I have 27kw cast iron wood burning fireplace and a wood/coal brick / ceramic kitchen and oven on the other side of the chimney. If I run both in -10c the house gets too hot. Once heated the house needs about 4 18inch logs a day. This is the only heating system. Burn oak, beech and birch. Burning pine or any conifer is a disaster for your chimney. Burns like gasoline and you have to keep feeding it.