A float on Miracle - 20ft narrowboat

I've gone off trying to use coal. My burner is a wood only model and after the initial attempts with coal which were only marginally successful I spoke with someone knowlegeable who mentioned that my particular burner may get dammaged if continued coal heat was applied. I love my burner, Jon at Windy Smithy makes beautiful and well designed stoves that are fit for purpose and I don't fancy ruining it.

Apart from the heat issue coal smoke/residue is acidic and when combined with the water vapour generated by combustion it can corrode the inside of your burner and flue unless both are designed for mixed fuels.