<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31472753</termId><termName>thermal storage walls</termName><termType>PT</termType><termNote><![CDATA[ Walls specially constructed to have a high capacity for collecting and storing heat or cold and then slowly releasing the stored energy through convection into a building space; usually designed as part of a passive solar system. ]]></termNote><termCreatedDate>2026-03-30 21:07:14</termCreatedDate><relation><relationType>UF</relationType><termId>31472754</termId><termName>storage walls, thermal</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31472755</termId><termName>thermal storage wall</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31472756</termId><termName>walls, thermal storage</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31458749</termId><termName>walls by function</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31478861</termId><termName>Trombe walls</termName><termType>PT</termType></relation></term>  </Zthes>