In reply to Sharp: This is simply cut and pasted from the website of the folk who I'm getting my stove from...
I burn a mixture of coal and wood in an open fire. If I buy a stove can I continue to burn these two fuels together?
Many people do, and seem to be happy with the results. There are one or two points to consider though.The most important is that mixing fuels can significantly shorten the life of the boiler if your stove is equipped with one. Much of the coal now imported into the country has a high sulphur content. Burning wood inevitably produces water vapour. Mix these two things together and you get sulphurous acid which will condense onto the nearest cold object it reaches - typically the boiler.
There may be other reasons