DIN EN 15420:2011-11

National foreword
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 M (normative) - Test apparatus for type C2 boilers
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'.