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prEN 303-2 Edition 12/2024
Heating boilers - Part 2: Heating boilers with forced draught burners - Special requirements for boilers with atomizing oil burners
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This document is applicable to boilers used for central heating in accordance with EN 303-1 up to a nominal heat output of 1 000 kW and EN 303-4 up to a nominal heat output of 70 kW with forced draught burners in accordance with EN 267 that are designed for operating with liquid fuels. The performance requirements of this document apply to type testing to heating boilers (standard, low temperature and condensing boilers) which are tested on a test rig in accordance with the test code given in EN 304. This document applies also to room sealed boilers as defined in EN 15035 regarding efficiency and emissions. This document can also be used as the basis for evaluation of boiler-/burner units.


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Technical Committee :
CEN/TC 57 : Central heating boilers


start of the vote on the project    16/03/2023   date of ratification (dor)    05/11/2024
end of the vote on the project    08/06/2023   date of anouncement (doa)    03/03/2025
start of the vote on the final project    13/08/2024   date of publication (dop)    03/06/2025
end of the vote on the final project    08/10/2024   date of withdrawal (dow)    03/06/2025

Publication Official Journal
of the Grand-Duchy of Luxembourg


Relations to older standards
ILNAS-EN 303-2:2017

International Classification for Standards (ICS codes) :

91.140.10 : Central heating systems


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