This European Standard applies to the determination of the performances of heating boilers and combi boilers fired by liquid fuels. The requirements for the heating performances are laid down in EN 303 1:2016 and EN 303 2:2016. This test code includes the requirements and recommendations for carrying out and evaluating the procedure for testing boilers and also the details of the technical conditions under which the tests will be carried out. The requirements and the performance of testing for the sanitary hot water production of combi boilers are laid down in EN 303 6.
EN 304:2017 history
2017EN 304:2017 Heating boilers - Test code for heating boilers for atomizing oil burners
1992EN 304:1992 Heating Boilers - Test Code for Heating Boilers for Atomizing Oil Burners Includes Amendment 1: June 1998 and Amendment 2: September 2003