part 1
The easy way to fix your problem would be to get a circulator pump to take from the wood boiler to your oil furnace. Probably under 100$ for the pump and a few fittings and copper pipe and labour wouldn't be a crazy amount. That hot water circulates to the oil furnace and heats the domestic water.Everyone around here that have woodboilers have a domestic water coil in them. I don't know why they would make them without one.
true, but once again, there are only 3/4" pipes leading to and from the wood stove. most circulator pumps are designed for 1 1/4" pipes...or there abouts.
also, i was under the impression that the potable hot water was being heated in the oil burner since i see extra pipes leading into it and there isn't a hot water tank nearby...unless the photos don't show it.
so......looks like some design work is needed there. wire up the wood burner circulator to a relay and it's own thermostat. problem is the oil burner must have a heat sensor for the domestic hot water as a stand alone, so the wood burner may not get his potable hot water hot enough.
without a separate hot water tank, his sytem is getting complicated...lol. first thing i'd do is i'd buy a gas hot water tank, or electric, and untie the hot water from the oil burner.