<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="abcb-glossentry" ?><abcb-glossentry xmlns:xt="urn:xpressauthor:trackchanges" id="_3b6db07a-1163-4370-97e7-a7696dbb44b2" outputclass="abcb-glossentry"><glossterm id="_1a6938c2-6f78-4114-8183-38bc79f33b70">Heating degree hours</glossterm><glossdef outputclass="glossdef"><p>For any one hour when the mean outdoor air temperature is less than 15°C, the degrees Celsius temperature difference between the mean outdoor air temperature and 15°C. </p></glossdef></abcb-glossentry>