<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31377292</termId><termName>hot water boilers</termName><termType>PT</termType><termNote><![CDATA[ Any heating unit in a hot water heating system in which water is heated before being circulated through pipes to radiators or baseboards. ]]></termNote><termCreatedDate>2026-03-30 20:41:45</termCreatedDate><relation><relationType>UF</relationType><termId>31377293</termId><termName>boilers, hot water</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31377294</termId><termName>boilers, hot-water</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31377295</termId><termName>hot water boiler</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31377296</termId><termName>hot-water boilers</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31347225</termId><termName>boilers</termName><termType>PT</termType></relation></term>  </Zthes>