<?xml version="1.0" encoding="UTF-8" standalone="no"?><image-reference xmlns:xt="urn:xpressauthor:trackchanges" id="_a0be51a7-6b6b-4bcb-a248-f4fc3ea1a6fb"><num><xt:insText xt:action="start" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:22:00" xt:id="7c9ab754-007d-4595-a024-f626680e51fa"/>F8D5b (explanatory)<xt:insText xt:action="end" xt:id="7c9ab754-007d-4595-a024-f626680e51fa"/></num><title id="_f71f49a7-1249-4ec3-a0b7-40744168c919"><xt:insText xt:action="start" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:22:00" xt:id="f55aea16-b651-4360-93a5-b1266b1bbf9c"/>Example of ventilation openings calculation<xt:insText xt:action="end" xt:id="f55aea16-b651-4360-93a5-b1266b1bbf9c"/></title><image height="1667" heightdpi="200" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/F8D5b-explanatory-Example-ventilation-openings-calculation.svg" width="1200" widthdpi="200"/><desc-note id="_b7728e1d-793a-42cd-93c3-c8a8fd852a75" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:23:16" xt:type="insert"><ol outputclass="numbered" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:23:26" xt:type="insert"><li id="_3d30697d-72da-4eb6-b78c-74cdddac19ff" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:23:26" xt:type="insert"><xt:insText xt:action="start" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:23:00" xt:id="23e1964e-6b95-4cb6-bc3c-82f5f21c2cc5"/>For a pitch ≥ 10° and &lt; 75°: Both have a clear longest total plan dimension of 20 m<xt:insText xt:action="end" xt:id="23e1964e-6b95-4cb6-bc3c-82f5f21c2cc5"/></li><li id="_a2635212-171e-47bf-9fca-9fee4f970175" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:23:54" xt:type="insert"><xt:insText xt:action="start" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:24:00" xt:id="bb9f7490-e993-456a-ad4a-f5c3051027b5"/>Total low-level ventilation = 2 × 20 × 7,000 mm2/m<xt:insText xt:action="end" xt:id="bb9f7490-e993-456a-ad4a-f5c3051027b5"/></li><li id="_618a64ee-f882-42c1-9881-69959f383c84" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:24:18" xt:type="insert"><xt:insText xt:action="start" xt:author="Lucy Bolding" xt:dateTime="2024-08-28T21:24:00" xt:id="2d0ae27f-6ba5-4f65-8f2b-0dba3a4d37f5"/>Total high-level ventilation = 20 × 5000 mm2/m<xt:insText xt:action="end" xt:id="2d0ae27f-6ba5-4f65-8f2b-0dba3a4d37f5"/></li></ol></desc-note></image-reference>