https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10496509#M4868 <P><SPAN>When using a double wall spec it appears estmep wants to line the skin vs the outer duct. Is there a setting to change this so it will line the outer duct.</SPAN></P> Mon, 26 Jul 2021 13:35:08 GMT Anonymous 2021-07-26T13:35:08Z https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10496509#M4868 <P><SPAN>When using a double wall spec it appears estmep wants to line the skin vs the outer duct. Is there a setting to change this so it will line the outer duct.</SPAN></P> Mon, 26 Jul 2021 13:35:08 GMT https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10496509#M4868 Anonymous 2021-07-26T13:35:08Z https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10497366#M4869 <P>The setting you are looking for is within the itm itself.&nbsp; Once you have double wall checked you will see settings to adjust skin inside vs outside and what material it should use.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="nathanchapman_0-1627326147937.png" style="width: 400px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/945271iABA6A30E3726A697/image-size/medium?v=v2&amp;px=400" role="button" title="nathanchapman_0-1627326147937.png" alt="nathanchapman_0-1627326147937.png" /></span></P><P>&nbsp;</P> Mon, 26 Jul 2021 19:02:33 GMT https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10497366#M4869 nathan.chapman 2021-07-26T19:02:33Z https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10497401#M4871 <P>That does not seem to matter...either way no matter what way you build the piece, it seems to want to line the inside piece.</P> Mon, 26 Jul 2021 19:15:31 GMT https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10497401#M4871 Anonymous 2021-07-26T19:15:31Z https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10497410#M4872 <P>Take a look at the square footage of the liner when you build a DW piece. If you build it as a inside or outside skin, the SF of liner stays the same and is based on the inner skin.</P> Mon, 26 Jul 2021 19:19:06 GMT https://forums.autodesk.com/t5/fabrication-cadmep-forum/double-wall-duct/m-p/10497410#M4872 Anonymous 2021-07-26T19:19:06Z