40mm have you considered other options aside from a in-fire wet back considering you have quite a small firebox? I would go with either a Yunca style water jacket heater that sits above the fire box...
Type: Posts; User: Moa Hunter
40mm have you considered other options aside from a in-fire wet back considering you have quite a small firebox? I would go with either a Yunca style water jacket heater that sits above the fire box...