I.S. EN 15420:2010

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification of boilers
5 Constructional requirements
6 Operational requirements
7 Test methods
8 Marking and instructions
Annex A (informative) - National situations
Annex B (informative) - Special national conditions
Annex C (informative) - A-deviations
Annex D (informative) - Classification of type C boilers
Annex E (informative) - Practical method of calibrating the test
        rig to enable the heat loss D[p] to be determined
Annex F (informative) - Main symbols and abbreviations used
Annex G (informative) - Compilation of test conditions
Annex H (informative) - Valving
Annex I (informative) - Determination of the heat losses from the
        test rig of the indirect method and the contributions of
        the circulating pump of the test rig
Annex J (informative) - Means of determining the ignition time at
        full rate
Annex K (informative) - Example of the calculation of the NO[x]
        weighting factors for a boiler with several rates
Annex L (informative) - Calculation of conversions of NO[x]
Annex N (informative) - Requirements and test methods for separate
        air supply and combustion products evacuation ducts of type
        C6 boilers
Annex O (informative) - Use of test gases
Annex ZA (informative) - Clauses of this European Standard
         addressing essential requirements or provisions of EU
         Directives
Bibliography

Defines the requirements and test methods concerning, in particular, the construction, safety, fitness for purpose, and rational use of energy, as well as the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan-assisted atmospheric burners or fully premixed burners, and are hereafter referred to as "boilers".