Biomass boilers have proper control and automatic feeder systems to ensure constant fuel supply of solid biomass in the form of pellets of chips. Furthermore, the boilers are often equipped with lambda-sensors to ensure optimal and efficient combustion of the biomass. Using the best of modern technology, biomass boilers can achieve over 90% efficiency, significantly more than conventional boilers.
Biomass boilers can either be used in a centralized plant that feeds a district heating or through distributed single units. Biomass boilers also have the advantage to be renewable, which makes it more efficient in terms of primary energy and CO2 emissions. Biomass boilers are not restricted to solid fuel, there are also systems using biogas or liquid biofuels. However these are seldom used for direct heat production, but rather to drive generators in combined heat and power plants.