BS EN 303-1:2017 applies to boilers used for central heating (heating boilers) with forced draught burners with a nominal heat output not exceeding 1 000 kW, which are operated either with negative pressure (natural draught boilers) or with positive pressure (pressurized boiler) in the combustion chamber, in accordance with the boiler instructions.

This European Standard specifies the necessary terminology, the requirements on the materials and testing of them, and marking requirements for heating boilers.

Particular requirements for boilers that can be used with open vented systems are contained in EN 303-4.

The requirements of this standard apply to heating boilers that are tested on an authorized test rig.

Boilers in accordance with this standard are designed for the heating of central heating installations in which the heat carrier is water, and the maximum allowable operating temperature of which is restricted to 100 °C. The maximum allowable operating pressure is 8 bar.

For boilers and water heaters (storage or continuous flow heater) this standard only applies to the parts which are necessarily subject to the operating conditions of the heating boiler (heating part).

This standard does not apply to gas boilers with atmospheric burners, boilers for solid fuels, boilers with oil vaporization burners. For these boilers there are further requirements.


Cross References:
EN 226:1987
IEC 60529:1989
EN ISO 6506 (all parts)
EN 61000-6-3:2007
EN ISO/IEC 17025:2005
EN 60335-2-102:2016
EN ISO 4063:2010
EN ISO 9606-2:2004
EN 304:2017
ISO 185:2005 Ed 2 (R10)
EN 13501-1:2007+A1:2009
ISO 7005-2:1988
EN 303-4:1999
EN 10025-2:2004
IEC 61000-6-2:2005
EN 10029:2010
EN 10204:2004
IEC 60335-1:2010
EN 60730-1:2011
ISO 9606-1:2012/Cor 1:2012
ISO 7-2:2000
IEC 60335-2-102:2004/AMD2:2012
EN 303-2:2017
ISO 7005-1:2011 Ed 2
EN 61000-6-3 (IEC 61000-6-3:2006) AS
EN 14597:2012
EN 10088-2:2014
ISO 228-2:1987
ISO 2553:2013 ED4
EN ISO 9606-1:2013
ISO 7-1:1994
EN 10028-2:2017
ISO 4063:2009
EN 60529:1991
EN 10027-2:2015
EN 10028-3:2017
IEC 60730-2-9:2008
ISO 9606-2:2004 (R08) Ed 2
ISO 857-2:2005
ISO 7005-3:1988
ISO 228-1:2000
EN 61000-6-2 (IEC 61000-6-2:2005) AS
EN 60335-1:2012
IEC 60730:2010
EN 60730-2-9:2010
EN 303-6:2000
EN 15035:2006
ISO 6506-1:2014 ED3
EN 15456:2008
EN 15034:2006
EN 13611:2007
EN 10021:2006
EN ISO 6506-1 (ISO 6506-1:2014) AS


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