I.S. EN 26:2015

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification of water heaters
5 Constructional requirements
6 Operational requirements
7 Rational use of energy
8 Fitness for purpose
9 Marking and instructions
10 Ecodesign Data
11 Energy Labelling Data
Annex A (informative) - National situations
Annex B (normative) - Test apparatus for type C[1], C[3], B[4]
        and B[5] water heaters
Annex C (normative) - Test apparatus for type C[21] appliances
Annex D (normative) - Description of the sealed room for the
        tests of type A[AS] appliances
Annex E (informative) - Soundness of the gas circuit test -
        Volumetric method
Annex F (informative) - Principal symbols and abbreviations used
Annex G (informative) - Guidelines for extension to other categories
Annex H (informative) - A deviations
Annex I (normative) - Lists of materials currently used
Annex J (normative) - Test methods to determine the effects of
        to long-term thermal load, long-term condensate exposure,
        condensing/non-condensing cycling and resistance to UV
        radiation
Annex K (informative) - NOx conversion calculation
Annex L (normative) - Parts in copper or copper alloys
Annex M (informative) - Compilation of the test conditions for
        the various gas families
Annex N (informative) - Alternative Method for the determination
        of the nominal heat input or the maximum and minimum heat
        input (according to 6.3.1) for appliances using a pneumatic
        gas/air ratio control system
Annex ZA (informative) - Relationship between this European
         Standard and the requirements of EU Directive 2009/142/EC
Annex ZB (informative) - Relationship between this European
         Standard and the requirements of Commission Regulation
         (EU) No 814/2013
Annex ZC (informative) - Relationship between this European
         Standard and the requirements of Commission Delegated
         Regulation (EU) No 812/2013
Bibliography

Specifies the specifications and test methods concerning the construction, safety, rational use of energy and fitness for purpose, and also the classification and marking of gas-fired instantaneous water heaters for sanitary uses, hereafter called 'water heaters'.