# The Renewable Heat Incentive Scheme Regulations 2018, Paragraph 9


The requirements of this paragraph are that—
(a) testing is carried out in accordance with—
(i) BS 14792:2017 or a subsequent version of that standard in respect of NOₓ emissions; and
(ii) BS EN 13284-1:2017 or BS ISO 9096:2017 or a subsequent version of one of those standards in respect of PM emissions;
(b) the emissions of PM represent the average of at least three measurements of emissions of PM, each of at least 30 minutes duration; and
(c) the value for NOₓ emissions is derived from the average of measurements made throughout the PM emission tests.

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Source: https://www.legislation.gov.uk/uksi/2018/611/schedule/1/paragraph/9 (the official version)
Page: https://openlegislation.uk/renewable-heat-incentive-scheme-regulations-2018/schedule-1/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.