This European Standard applies to type CX3 central heating boilers as specified in 4.1, equipped with atomizing oil burners: - type C13, type C33, and type C53 boilers, including their combustion air supply and combustion products evacuation ducts and their terminals; - type C43 boilers including their connection ducts but without the chimney which is erected as a shared duct system and which is part of the building; - type C63 boilers, including the connecting piece as specified in 3.7, if not integrated into the boiler; - type C83 boilers, including their connection ducts but without the chimney which is part of the building;
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