<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_d5fd07ac-4638-4922-83a5-8f4c51bd6211" 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>S31C12</sptc><title id="_798b9813-6cb0-497b-9e9d-2757bea9d1a7">Exhaust fans</title><archive-num>2019: Spec G3.8: 3.6</archive-num><subclause id="_36cc9bc6-66b5-416e-913f-acff5ba96033" outputclass="subclause"><title id="_2162a974-5d4b-494d-930c-1ff55491e568">SubClause</title><num>1</num><p>Smoke exhaust must be provided by fans capable of continuous and <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_92aaa75f-f99a-4865-95a1-6e51a1e8e2bf" scope="local" type="abcb-glossentry">required</xref> operation for a period of not less than 1 hour when handling exhaust gases at 200°C.</p></subclause><subclause id="_a391da0a-c257-4f34-b298-676a8558f4e0" outputclass="subclause"><title id="_d1aeee31-028d-4dc4-b288-4a2607133e02">SubClause</title><num>2</num><p>Where a Class 2, 3 or 9 part of a building adjoins an <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1197_1.0.0.xml#_d0042ee6-21cd-4d8c-8873-d8bfb694ceff" id="_aa1fe396-3df5-4064-a0d5-4d0f45bae11c" scope="local" type="abcb-glossentry">atrium</xref>, the <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1197_1.0.0.xml#_d0042ee6-21cd-4d8c-8873-d8bfb694ceff" id="_f2b35875-1d81-4396-9a50-d35469403cf1" scope="local" type="abcb-glossentry">atrium</xref> must be provided with a minimum of 3 fans each capable of 50% of the total <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_2769bdf8-dad2-47e4-9730-9c27bc99c657" scope="local" type="abcb-glossentry">required</xref> smoke exhaust capacity.</p></subclause><subclause id="_9d3cd706-b156-4b10-8046-60828e9b415c" outputclass="subclause"><title id="_1faa7323-cc29-4add-aace-7b8e97fb270c">SubClause</title><num>3</num><p><xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1197_1.0.0.xml#_d0042ee6-21cd-4d8c-8873-d8bfb694ceff" id="_8bf2dab9-65de-489b-a94f-e1ab4137da0a" scope="local" type="abcb-glossentry">Atriums</xref> other than those referred to in (2) must be provided with a minimum of 2 fans each capable of 50% of the total <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_af6fde9f-147d-4782-8b85-42044e80fd42" id="_29d1b42c-cc18-415b-ad29-b52b978ec3ad" scope="local" type="abcb-glossentry">required</xref> smoke exhaust capacity.</p></subclause></clause>