<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">natural ventilation</topic></authority><related type="broader"><topic>ventilation</topic></related><variant type="other"><topic>systems, natural ventilation</topic></variant><variant type="other"><topic>systems, passive ventilating</topic></variant><variant type="other"><topic>systems, passive ventilation</topic></variant><variant type="other"><topic>ventilating systems, natural</topic></variant><variant type="other"><topic>ventilating systems, passive</topic></variant><variant type="other"><topic>ventilation systems, natural</topic></variant><variant type="other"><topic>ventilation systems, passive</topic></variant><variant type="other"><topic>ventilation, natural</topic></variant><variant type="other"><topic>ventilation, passive</topic></variant><variant type="other"><topic>natural ventilating systems</topic></variant><variant type="other"><topic>natural ventilation systems</topic></variant><variant type="other"><topic>passive ventilating systems</topic></variant><variant type="other"><topic>passive ventilation</topic></variant><variant type="other"><topic>passive ventilation systems</topic></variant><variant type="other"><topic>systems, natural ventilating</topic></variant> <note xml:lang="en"><![CDATA[ Ventilation systems that depend on natural atmospheric conditions and the manual operation of building openings, such as windows, doors, and transoms. ]]></note></mads>