This document is applicable to hand and automatically fired residential independent boilers (hereafter called appliances) having a nominal heat outputs up to 50 kW. The primary function of the appliance is to provide hot water for central heating and/or domestic use. In addition to their primary function of providing hot water these appliances also provide space heating to the place of installation. They are designed for use only with open vented systems at a working pressure not exceeding 2 bar. The appliances can burn one or more types of the following solid fuels in accordance with the appliance manufacturer s instructions: wood logs; compressed untreated wood; wood pellets; lignite briquettes; solid mineral fuels; peat briquettes. The appliances are operated closed and / or open. The appliances are typed according to their tightness depending on their designation in accordance with a possible operation together with a room ventilation system. This document is not applicable to appliances for hot water only production and having heat outputs of less than 5 kW. This document is also not applicable for automatic stoking devices. This document is used in conjunction with EN 16510-1 of which it is an integral part.