<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause"?><clause id="_646a2e49-f938-4615-b319-64074bc3813a" outputclass="ncc-clause" variation="TAS"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>I12D7</sptc><title id="_27420437-f293-46de-a4fa-e1da8e142462">Ventilation</title><archive-num>2019: TAS H114.7</archive-num><subclause id="_d49c17bb-d5a3-42a8-a4d7-12111bab572b" outputclass="subclause"><title id="_e44eaa37-fc56-41f9-945c-21ed32e557a0">SubClause</title><num>1</num><p>Mechanical or natural ventilation must be via low-level, exhaust ducting in a wall and a fixed, open, floor-level, fresh-air inlet ducting in the opposite wall such as to ensure a cross flow of the ventilation over the complete working area.</p></subclause><subclause id="_bdbec9bc-5eaf-41b8-80cd-56db00810028" outputclass="subclause"><title id="_2bc4008c-8083-4f33-9198-adc1c952e4ff">SubClause</title><num>2</num><p>Mechanical ventilation must provide not less than 6 air changes per hour.</p></subclause><subclause id="_d22d3690-e260-44b0-bc7f-f5c558893db1" outputclass="subclause"><title id="_80334379-34df-4273-a718-aaefcf70a8df">SubClause</title><num>3</num><p>The ventilation fan and exhaust ducting must be arranged in such a manner as to—</p><ol outputclass="alpha"><li id="_f9f793da-cc0f-4f4c-9526-a0d9b359a70a">produce a negative pressure within any exhaust ducting within the work place so that a leak in the ducting will not vent exhaust air back in to the work place; and</li><li id="_04c29f65-88db-47f9-a4f8-e6f8f06ad89f">vent the exhaust air to the atmosphere so as to prevent recirculation of that exhaust air.</li></ol></subclause></clause>