Cleanburn is a system by which warm air is introduced just above the normal height of the fire. The effect is to allow the combustion of unburned hydrocarbons in the smoke stream. This, in turn, provides not only a ‘cleaner burn’ (i.e. less soot particles going
up the chimney/flue and into the atmosphere) but also generates up to twice the heat output from the same amount of fuel. Furthermore, you will enjoy the sight of even more flames.