<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_98bd6238-b3fb-44e0-af40-97a454e7e2af" outputclass="ncc-clause"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>G2V1</sptc><title id="_ba7cbf7c-057a-41a7-aa74-598625c9f36a">Combustion appliances</title><archive-num>2019: GV2</archive-num><subclause id="_2db593e4-0c03-44fb-ac51-fa23a6c5f534" outputclass="subclause"><title id="_b52fbcc8-6f2d-48d7-afa9-6c963c0b36f6">SubClause</title><num>1</num><p>Compliance with <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/930_2.1.0.xml#_1679060b-da2f-4043-bb65-d5fa571973d6" id="_d0d5d86e-889e-4b82-b583-592ddea26ec3" scope="local" type="clause">G2P1(a)</xref> and <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/930_2.1.0.xml#_1679060b-da2f-4043-bb65-d5fa571973d6" id="_f294f50e-387a-44ea-827d-3d9db79be21d" scope="local" type="clause">G2P1(b)</xref> is verified when—</p><ol outputclass="alpha"><li id="_3be29613-3217-49fd-8cc9-d7185d1e7ab5">components used within an appliance and its installation are constructed from—<ol><li>heat-resistant materials for maximum operating temperatures not less than 600℃, where the material complies with (c); or</li><li>heat-tolerant materials for maximum operating temperatures more than 150℃ and less than 600℃, where the material complies with (c); and</li></ol></li><li id="_44247de7-d895-4db2-a9ec-e42c78b5f6a3">the building elements surrounding the appliance maintain their designed function and material properties inclusive of a full range of thermal movements when exposed to the heat effects of the appliance; and</li><li id="_eecd151b-0584-4602-9e61-1f6c25f3057c">a sample of the material is tested to the maximum operating temperature, specified in (a)(i) or (a)(ii) for a minimum of 96 hours; and</li><li id="_a1f93876-4a5b-4c8e-b11c-049cc518b7ec">the tested sample, when allowed to cool, is free from—<ol><li>visible cracks and fractures; and</li><li>visible indication of de-lamination; and</li><li>linear distortion in excess of the equivalent of 10 mm per metre, and</li><li>deterioration of the appearance of any surface finish, when compared to an unheated sample.</li></ol></li></ol></subclause></clause>