EVS-EN 297:1999

Gas-fired central heating boilers - Type B11 and B11BS boilers, fitted with atmospheric burners of nominal heat input not exceeding 70 kW

General information
Withdrawn from 03.09.2014
Base Documents
EN 297:1994; EN 297:1994/A2:1996; EN 297:1994/A3:1996; EN 297:1994/A5:1998
Directives or regulations
2009/142/EC Gas appliances (GAD)

Although the standard’s status is withdrawn, it still has the presumption of conformity in the meaning of regulation 2009/142/EC and conformance with the regulation ’s requirements can be guaranteed by using the withdrawn version of the standard. The presumption of conformity is valid until a corresponding amendment is published in the Official Journal of the European Union.
To view the latest lists of harmonised standards published in the Official Journal of the European Union, visit:

Standard history

This European Standard specifies the requirements and test methods for the construction, safety, fitness for purpose, rational use of energy, classification and marking of gas-fired central heating boilers, hereafter referred to as "boilers". This standard applies to type B11 and BB11BS boilers: - fitted with atmospheric burners; - that use gases corresponding to the three gas families and to the pressures stated in 4.1.4; - that have a nominal heat input not exceeding 70 kW (on net calorific value); - where the temperature of the water does not exceed 95 øC during normal operation; - where the maximum water-side operating pressure does not exceed 6 bar. This standard does not contain all the necessary requirements for: boilers: - intended to be installed in the open; - having multiple heating units with a single draught diverter; - with fan-assisted combustion; - of the condensing type; i- ntended to be connected to a common flue having mechanical extraction; - fitted with manual or automatic means of adjusting the air supply and/or adjusting the evacuation of the combustion products; - of the combination type (central heating and domestic hot water production); appliances: - combining the functions of an independent space heater and a hot water generator for central heating. This standard only covers type testing.
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