Not worth the effort.
Can be done but expensive to do right. Most people loose interest
and the multifuel stove will remain unused.
People misjudge the quantity of wood/fuel that is required
to generate the same amount of heat as a litre of oil.
Think sack of wood tank of hot water. To heat a house you'll do nothing but
fill the stove all the time.
OPS is considering a woodchip boiler you p***k.
Why don't you take that copy and paste and shove it where the sun don't shine buddy?
Same applies to woodchip. Complete nonsense for a heating system.