<?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">heating systems</topic></authority><related type="narrower"><topic>furnaces</topic></related><related type="narrower"><topic>resistance heating</topic></related><related type="narrower"><topic>hot water heating</topic></related><related type="narrower"><topic>radiant heating</topic></related><related type="narrower"><topic>solar heating</topic></related><related type="narrower"><topic>steam heating</topic></related><related type="narrower"><topic>warm air heating</topic></related><related type="narrower"><topic>heat-distributing units</topic></related><related type="other"><topic>heating equipment</topic></related><related type="broader"><topic>HVAC</topic></related><variant type="other"><topic>building heating systems</topic></variant><variant type="other"><topic>heating</topic></variant><variant type="other"><topic>heating system</topic></variant><variant type="other"><topic>systems, heating</topic></variant> <note xml:lang="en"><![CDATA[ Assemblies of interrelated equipment designed to provide heat to buildings and other structures. ]]></note></mads>