SR EN 303-3:2001

This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage of an assembly made up of a boiler body complying with EN 303- 11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a "boiler". This European Standard applies to a boiler: - with a nominal output not exceeding 1 000 kW. This European Standard does not contain all the necessary requirements for: - assemblies designed as units; - condensing boilers and low temperature boilers; - boilers intended to be installed in the open; - boilers permanently fitted with more than one flue outlet; - boilers fitted with a draught diverter; - boilers intended to be connected to a common flue having mechanical extraction. This European Standard does not apply to living-space dedicated boilers If the boiler body has already been tested with a liquid fuel burner, in accordance with EN 303-1, EN 303-2 and EN 304, only the tests described in annex G need to be performed. In the case of a range of boi