Efficiencies of biomass boilers

The boiler efficiency is always depending on several aspects of an installation. The annual efficiency of a biomass boiler is very much depending on the controls of boiler and ancillary components. So the boiler efficiency is very much linked to the system efficiency of the whole heating system. If a boiler has to start and stop very often then the boiler efficiency is bad hence it is usually an advantage to have a small buffer store in order to avoid short cycling of the biomass boiler and to provide permanently and instantly heat for heating and DHW preparation.