<?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">passive solar heating</topic></authority><related type="other"><topic>Trombe walls</topic></related><related type="broader"><topic>solar heating</topic></related><variant type="other"><topic>heating, passive solar</topic></variant><variant type="other"><topic>passive solar heating systems</topic></variant><variant type="other"><topic>solar heating, passive</topic></variant><variant type="other"><topic>systems, passive solar heating</topic></variant> <note xml:lang="en"><![CDATA[ Solar heating systems that collect and transfer heat by the natural laws of convection, conduction, and radiation with little or no mechanical assistance; for solar heating systems utilizing mechanical devices to transfer heat, use "active solar heating." ]]></note></mads>