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	<title>File:Fse-smoke-and-heat-exhaust-ventilation-v3.svg - Revision history</title>
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	<updated>2026-11-04T14:09:08Z</updated>
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		<title>Lisa: Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity</title>
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		<updated>2026-11-02T16:26:53Z</updated>

		<summary type="html">&lt;p&gt;Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;== Summary ==&lt;br /&gt;
Relative mass flow through a natural roof vent as a function of the ratio of layer to ambient absolute temperature. Above a ratio of 1.3 the flow is within 80 % of its maximum. Based on Cooper (2002b), p. 3-224.&lt;br /&gt;
&lt;br /&gt;
Original vector illustration for [[Smoke and heat exhaust ventilation]], level 2 Intermediate.&lt;br /&gt;
&lt;br /&gt;
* Source basis: Cooper (2002b), p. 3-224, Equation 19 and Figure 3-9.3 (redraw, do not copy)&lt;br /&gt;
* Alt text: Curve of relative vent mass flow against layer-to-ambient temperature ratio, rising steeply to a maximum of 1 at a ratio of 2 and falling slowly after.&lt;br /&gt;
&lt;br /&gt;
== Licensing ==&lt;br /&gt;
New drawing by Fire Safety Academy. © Fire Safety Academy.&lt;/div&gt;</summary>
		<author><name>Lisa</name></author>
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