This European Standard applies to heating boilers (e.g. with forced-draught burners (unit)) and burners equipped with a fan including all components specified by the manufacturer to be required for the designed boiler operation.This European Standard also applies to heating boilers sold without burners.This European Standard covers the required definitions, the system boundaries, the measurements for the determination of the electrical power consumption and, where applicable, the water side resistance in order to establish the electric auxiliary energy for:- Oil-fired forced-draught burners in accordance with EN 267;- Automatic forced-draught burners for ga