<?xml version="1.0" encoding="UTF-8" standalone="no"?><table-reference graph="None" id="_315fa904-2dbc-4457-8ed4-dbc223d74cf3" variation="NT"><num>13.7.4b (explanatory)</num><title id="_57d37ce7-2d75-4066-8f26-c259616187ba">Sheetwork ductwork – external insulation</title><table id="_0bb616c7-0da6-415b-9bd5-4b765f8ab940" keycol="1"><tgroup cols="2"><colspec colname="002" colnum="1" colwidth="216.00*"/><colspec colname="003" colnum="2" colwidth="216.00*"/><thead><row><entry>Insulating material and thickness</entry><entry><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="_c96ca22b-378d-4d5d-8118-e747b804e359" qxa:read-only="true" referencetype="Text" scope="local" synctargettext="true" type="glossterm">R-Value</xref></entry></row></thead><tbody><row><entry>38 mm glasswool (22 kg/m<sup id="_b15fd7a9-9520-4fc4-81fa-667831378bb0">3</sup>)</entry><entry>1.0</entry></row><row><entry>50 mm polyester (20 kg/m<sup id="_a1af0699-021e-44c5-9e03-1e91427b5c59">3</sup>)</entry><entry>1.1</entry></row><row><entry>50 mm glasswool (22 kg/m<sup id="_c856a389-cd25-43f7-a5cc-cb931f49d102">3</sup>)</entry><entry>1.5</entry></row><row><entry>75 mm polyester (20 kg/m<sup id="_6030cf93-458b-4a31-8d00-276332173811">3</sup>)</entry><entry>1.7</entry></row></tbody></tgroup></table></table-reference>