High performance biomass boilers are only as good as the fuel they burn. Anything other than virgin wood with no more than 20% moisture content will have a negative impact on the kWh output and RHI payments. Chip Chip produces 20% moisture content (+/- 2%) to ensure the fuel burns cleanly and efficiently and results in higher kWh output and higher calorific value per tonne. Wood chip with little or no moisture content burn too rapidly. Wood chip with more than the recommended moisture content reduces the power output and causes excessive tarring, ash production and emissions.