<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31319967</termId><termName>air infiltration barriers</termName><termType>PT</termType><termNote><![CDATA[ Plastic sheeting, building paper, or similar materials that wrap the walls of a building beneath the outermost surface, serving to diminish the infiltration and exfiltration of air. ]]></termNote><termCreatedDate>2026-03-30 20:26:14</termCreatedDate><relation><relationType>UF</relationType><termId>31319968</termId><termName>air barriers</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31319969</termId><termName>air infiltration barrier</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31319970</termId><termName>barriers, air infiltration</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31319971</termId><termName>infiltration barriers, air</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31305867</termId><termName>building materials</termName><termType>PT</termType></relation></term>  </Zthes>