A technical illustration of a biomass boiler in operation, showcasing its internal components and mechanisms. The boiler is cut away to reveal the combustion chamber where biomass fuel is being burned, heat exchanger, and the system of pipes for water circulation. Around the boiler, there are depictions of various types of biomass fuels, such as wood pellets, chips, and agricultural residues. The background includes a flowchart or infographic, explaining the process of energy conversion from biomass to heat energy. --v 6