File:Fse-fire-induced-pressure-v1.svg

Fse-fire-induced-pressure-v1.svg (SVG file, nominally 900 × 600 pixels, file size: 9 KB)

Summary

A fire in a sealed room (left), in a room that only leaks (centre) and in a room with an open door (right). Based on Emmons (2002), pp. 2-32 and 2-34, and Iqbal and Salley (2004), p. 14-1.

Original illustration for Fire-induced pressure, level 4 Expert.

Source basis: Emmons (2002), p. 2-32 (expansion drives gas out; hermetically sealed room would burst), p. 2-34 (buoyant outflow at the top and inflow at the bottom once the fire grows), p. 2-38 (neutral axis somewhat above the hot-cold interface in the room); Iqbal and Salley (2004), p. 14-1 (pressure rise from expansion in closed or slightly leaky rooms drives flow out and prevents inflow; hydrostatic differences negligible)
Alt text: Three cross-sections of the same room with a fire: sealed with outward pressure arrows, leaking smoke through door gaps, and with an open door.

Licensing

New drawing by Fire Safety Academy. © Fire Safety Academy.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:15, 2 November 2026		900 × 600 (9 KB)	Jan (talk \| contribs)	Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity

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Fire-induced pressure

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Short title	A fire in a sealed room (left), in a room that only leaks (centre) and in a room with an open door (right). Based on Emmons (2002), pp. 2-32 and 2-34, and Iqbal and Salley (2004), p. 14-1.
Image title	Three cross-sections of the same room with a fire: sealed with outward pressure arrows, leaking smoke through door gaps, and with an open door. Source basis: Emmons (2002), p. 2-32 (expansion drives gas out; hermetically sealed room would burst), p. 2-34 (buoyant outflow at the top and inflow at the bottom once the fire grows), p. 2-38 (neutral axis somewhat above the hot-cold interface in the room); Iqbal and Salley (2004), p. 14-1 (pressure rise from expansion in closed or slightly leaky rooms drives flow out and prevents inflow; hydrostatic differences negligible)
Width	900
Height	600