An improved combustion system

A combustion system, said combustion system including:

• a) a wood burner, said wood burner including:
• i. a firebox,
• ii. a firebase at, or forming, the bottom of the firebox,
• iii. a primary combustion zone for pyrolysising and/or combusting a biomass fuel,
• iv. a first air supply means for supplying primary air into the firebox,
• v. a secondary combustion zone for combusting gases and/or particulate matter produced from the pyrolysis and/or combustion of the biomass fuel,
• vi. an exhaust flue,
• b) a charcoal/reduction layer which forms below the primary combustion zone, and/or in the region of the secondary combustion zone and/or between the primary combustion zone and the secondary combustion zone, the arrangement and construction being such that the gases and/or particulate matter produced from the pyrolysis and/or combustion of the biomass fuel in the primary combustion zone have to pass over, or through, said charcoal/reduction layer prior to entering the secondary combustion zone and/or the exhaust flue,
• c) a second air supply means for introducing heated secondary air into the firebox, the arrangement and construction being such that said secondary air passes through (or adjacent to the region of) the charcoal/reduction layer and/or the secondary combustion zone, to thus heat the secondary air as it is being introduced into the firebox,
• the arrangement and construction being such that the second air supply means is in the form of one or more apertures formed in the firebase of the firebox, whereby said secondary air is introduced into the firebox via said one or more apertures.