The importance of biomass boilers in the energy transition is in no doubt, as the advantages offered by replacing fossil fuels with biomass is endorsed by its availability at national level. The development of automatic boilers has achieved levels of performance and emissions unimaginable a few years ago; while the development of new standardised fuels has helped to democratise these boilers, thus increasing their popularity. In addition, automation can equip them with safety measures, even with different mechanisms to address the same risk, thereby positioning them at the level of the safest of boilers.
To reduce the environmental impact of biomass combustion, European legislation is paying increasingly more attention to the emissions of different types of heating systems. For example, within the scope of Europe’s Ecodesign Directive (Directive 2009/125/EC), different regulations have been implemented that impact both the labelling and the limits regarding efficiencyand emissions: stoves Regulation 2015/1185 (Requirements) and 2015/1186 (Labelling); and boilers Regulation 2015/1189 (Requirements) and 2015/1187 (Labelling).
The regulatory implementation has set the particulate emissions limit for pellet boilers at 40 mg/m3 (the limit was 150 mg/m3 until 2020). As regards NOx emissions, the limit has been set at 200 mg/m3.