Smokeless fuel is what we recommend for multi-fuel stoves and here is why;
Smokeless fuels give out a higher heat and can last as much as 40% longer than coal.
Smokeless fuels is much more cost effective than ordinary coal and will actually work out less expensive over the course of a year. The heating efficiency on an open fire using some smokeless fuels is 37%, compared to the 28% generated by traditional house coal. If you were to use the same fuel on your multi-fuel stove this figure leaps up to 65%. This means more heat makes it into your room rather than being wasted up the chimney. This, coupled with the fact that Homefire burns 40% longer than house coal, means that you end up using less fuel and spending less money to create your required heat. Switching to premium smokeless coal can cut your heating bills significantly over the course of the year. And a bonus you spend less time re-fuelling the fire!
When burning house coal on a closed appliance the tar and smoke particles released during the lower temperature lighting and refuelling periods can find their way onto the stove glass. While most modern appliances have pre-heated airwash capabilities to keep the glass clear even the best system will struggle to cope with the volume of tar and dust generated by burning house coal. The end result is that the appearance and enjoyment of your expensive multi-fuel stove is greatly diminished. Coal generally has a higher calorific value and therefore maybe too hot for your stove and in turn could cause significant damage.
We recommend Homefire Smokeless Coal as a good around choice of fuel for a multi fuel stove.