Care to do the maths?, Take away the gas, leccy and coal.............................

[Gizmo]

At the moment i use a combination of wood and smokeless coal. I use the smokeless coal as I was warned off using house coal in the burner.

You've never had any problems with increased amount of deposits in the flue ?

I need to get the chimney swept so I might get a stock of house coal in afterwards and see if there is any difference, or if there is a difference is it enough to cause a problem.

Coal is certainly easier to store in large quantities than wood, but down here at least wood is easy and often free to get hold of whereas coal needs to be purchased