# Regulation (EU) 2016/426 of the European Parliament and of the Council of 9 March 2016 on appliances burning gaseous fuels and repealing Directive 2009/142/EC (Text with EEA relevance), Division 1: The Secretary of State must provide the following content in the information that is published under Article 4:

Extent: E+W+S+N.I.

(a)
(i)
gross calorific value (GCV) in MJ/m3
minimum/maximum;
(ii)
Wobbe index in MJ/m3
minimum/maximum.
(b)
Gas composition by volume in % of the total content:
—
C1 to C5 content in % (sum)
minimum/maximum;
—
N2 + CO2 content in %
minimum/maximum;
—
CO content in %
minimum/maximum;
—
unsaturated HC content in %
minimum/maximum;
—
hydrogen content in %
minimum/maximum.
(c)
Information on toxic components contained in the gaseous fuel.
That communication shall also include either of the following:
(a)
supply pressure at the inlet of appliances in mbar:
nominal/minimum/maximum;
(b)
(i)
supply pressure at the point of delivery in mbar:
nominal/minimum/maximum;
(ii)
admissible pressure loss in the end-user gas installation in mbar:
nominal/minimum/maximum.

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Source: https://www.legislation.gov.uk/eur/2016/426/annex/II/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2016-426/annex-II/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.