<?xml version="1.0" encoding="UTF-8" standalone="no"?><table-reference graph="None" id="_a15b0bfc-2596-49aa-bb6a-e36b83a91209" variation="NT"><num>13.7.4</num><title id="_d2bad672-e47e-4f0a-8d0b-6ce8e5b9b0e2">Heating and cooling ductwork and fittings – minimum total R-Value</title><table id="_0bb616c7-0da6-415b-9bd5-4b765f8ab940" keycol="1"><tgroup cols="4"><colspec colname="001" colnum="1" colwidth="108.05*"/><colspec colname="002" colnum="2" colwidth="108.05*"/><colspec colname="003" colnum="3" colwidth="107.95*"/><colspec colname="004" colnum="4" colwidth="107.95*"/><thead><row><entry>Element</entry><entry nameend="004" namest="002">Minimum <xref xmlns:qxa="urn:schemas-quark-com:xmlauthor" format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1420_0.4.0.xml#_f438bdfd-6adb-43c4-b342-7b1656af23c4" id="_d7b4cced-fee8-4dc0-8452-b06974130c1c" qxa:read-only="true" referencetype="Text" scope="local" synctargettext="true" type="glossterm">R-Value</xref> for ductwork and fittings</entry></row><row><entry/><entry>Evaporative cooling system</entry><entry>Heating-only system or refrigerated cooling-only system</entry><entry>Combined heat and refrigerated cooling system</entry></row></thead><tbody><row><entry>Ductwork</entry><entry>0.6</entry><entry>1.0</entry><entry>1.5</entry></row><row><entry>Fittings</entry><entry align="center" nameend="004" namest="002" valign="top">0.4</entry></row></tbody></tgroup></table><desc-note id="_49993e57-1802-4e0a-9525-70291c37bf52"><p>The minimum material <xref xmlns:inv="urn:xpressauthor:xpressdocument" xmlns:qxa="urn:schemas-quark-com:xmlauthor" format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1420_0.4.0.xml#_f438bdfd-6adb-43c4-b342-7b1656af23c4" id="_e8a52fe9-8557-4f15-928a-c766f88ea6d1" inv:access="external" qxa:read-only="true" referencetype="Text" scope="local" synctargettext="true" type="glossterm">R-Value</xref> <xref xmlns:inv="urn:xpressauthor:xpressdocument" format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1432_4.0.0.xml#_a5b45a91-1ac3-44a8-8644-acfc09c225a9" id="_e107b65e-9c55-4937-ad25-e5b04029975b" inv:access="external" referencetype="Text" scope="local" synctargettext="false" type="glossterm">required</xref> for ductwork may be reduced by 0.5 for combined heating and refrigerated cooling systems if the ducts are—</p><ol outputclass="alpha"><li id="_0d791a66-10af-45b2-bee3-1e3af9698311">under a suspended floor with an enclosed perimeter; or </li><li id="_52cd92d6-4cfe-431e-a3ea-3723e27fc50e">in a roof space that has an insulation of greater than or equal to R0.5 directly beneath the roofing. </li></ol></desc-note></table-reference>