We have no hot water piping in our home. We rely on the log burners/fire pit one of which always has a pot of hot water on it also our shower unit.
The best way to describe it is.....you light a small fire in the fire pit at the bottom which sends the heat up through a cylinder containing water (filled constantly from the main water supply) and obviously (as a normal fire) the heat passes through a pipe and out of the house via a chimney. When the pressure in the tank is sufficient the water automatically egresses from the shower and the temperature and output of the water is controlled by two taps on the side of the tank.
This provides us with heat from the fire box and the pipe work also hot water via a tap we have affix to the bottom of the water cylinder/tank. It has the bonus of being moveable, so, in the summer we can take it outside attached it to a water hose and shower outside.
Some people fix these with pressure gauges and release valves to provide hot water through the house but we like things simple.
But this system (for us) is perfect warmth/heating, hot water and showers all free courtesy of the dead wood we have gathered from the lands around us, no gas or electric costs at all.
One small admission though......we are on our second shower the first one we managed to overheat and cracked it, moral of the story read the instructions, they work fine with wood but sunflower blocks burn so hot too many can cause some serious damage!! Lesson learnt (another one)
