Combustion is a complex phenomenon. The output of this violent reaction is, in the first instance heat and, at the same time, a number of by-products and waste products, which in many cases may be harmful to humans and the surrounding environment.
For these reasons, the consumer and civil segments (which for simplicity we can associate with powers of less than 1 MW), has been influenced by the thermal accounting mechanism (2013) that, in relation to biomass, encourages small interventions (powers of less than 1 MW of heat) for producing thermal energy from renewable sources and high efficiency systems (art. 4, paragraph 2 of the decree).
For biomass boilers, the calculation is based on the product of 4 factors: