ive an existing pressurised oil ch system with a mix of rads and ufh to which i want to add a wood burner. for safety reasons this is not such a simple operation and afaik the 2 choices i have are
1 change to a twin coil cylinder and use the wood burner to heat the water and bathroom rad on a seperate circuit - expensive and awkward.
2 plug in to existing circuit and add a second tank in the attic to depressurize the ch system - easy and cheap.
is anyone aware of any disadvanteges of or issues with an unpressurised system