This standard specifies the terminology, the general requirements for the construction and operation of automatic forced draught gas burners and also the provision of control and safety devices, and the type test procedure for these burners. This standard is applicable to -- automatic gas burners with a combustion air fan (hereinafter called “burners”) that are equipped as described in 4, intended for use in heat generators of different types, and that are operated with fuel gases. -- total pre-mixed burners and nozzle mixed burners. The standard is applicable to -- single burners, although such burners are fitted to a single appliance, in which case the requirements of the relevant appliance standard shall additionally apply; - single-fuel and dual-fuel burners when operating only on gas; - the gas function of dual-fuel burners designed to operate simultaneously on gaseous and liquid fuels in which case the requirements of EN 267 will also apply in respect of the liquid fuel function. This standard does not apply to induced draught burners and burners intended for use in industrial processes although some aspects of the standard may be relevant .