I have also seen and have heard positive comments on the flue water jackets. they are basically coil of copper wrapped around the flue and fitted on the first big of chimney coming out of the heater. They are not as efficient as the wetback but easy to retrofit a standard heater.
gpigeon wrote: A few years ago I cut a 200 m square out of the back of it and welded a SS316 water box into the hole. This works "sort of" ok but does not heat the water to a very high temp.
I replaced the first piece of 900mm flue with a double skinned stainless piece. the two cylinders (one inside the other) is full of water and the flue gases run through the middle of the inner cylinder.
gpigeon wrote:If I leave the tree there to die and decay as nature ordained, the "nett" contribution to the enviroment will be zero. Thus, better to harvest it and burn it when it is young!
gpigeon wrote:I am seeking member's experiences with wood fired heaters fitted with water coil or box.
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