本欧洲标准适用于燃油加热锅炉，由制造商宣布将锅炉冷凝至标称发热量为1 000 kW，并配备了符合EN 267要求的雾化燃烧器。 注意本欧洲标准定义了三类燃油锅炉，效率要求高于锅炉效率指令（BED）94/42/EEC中的低温锅炉。 本欧洲标准完成/修改了EN 303-1，EN 303-2和EN 304，并规定了冷凝锅炉的补充要求

This European Standard applies to oil-fired heating boilers, which are declared by the manufacturer to be condensing boilers up to a nominal heat output of 1 000 kW supplied as a unit with an atomizing oil burner which meets the requirements of EN 267. NOTE This European Standard defines three classes of oil fired boilers with efficiency requirements higher than those given for low temperature boilers in the Boiler Efficiency Directive (BED) 94/42/EEC. This European Standard completes/modifies EN 303-1, EN 303-2 and EN 304 and specifies supplementary requirements for condensing boilers.