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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I suppose there is probably some benefit to a green roof, but I’ve never tried to claim credit for it. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>At least in Seattle’s damp climate, when you would most benefit from the additional insulation of a green-roof-layer (winter) is the same time of the year the growth medium will be saturated, and likely provide you with the least insulative value. In the summer, when you would actually want the heat to escape, the medium will dry out (unless you are irrigating it). <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Soil has an insulative value of only around R-0.104/in (at least according to a table in the Seattle Energy Code), so even ignoring moisture levels, it doesn’t seem like there is much benefit there. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I suppose in a heavy cooling climate the reflectivity of the plants might get you some benefit, as well as the evaportative cooling effect if you are irrigating. Is that where the credit would be? Is there a thermal mass benefit?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-top:1.0pt'><b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#632423'>Nathan Miller, PE, LEED AP BD+C<o:p></o:p></span></b></p><p class=MsoNormal style='margin-top:4.0pt'><i><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>Mechanical Engineer/Senior Energy Analyst<o:p></o:p></span></i></p><p class=MsoNormal style='margin-top:8.0pt;line-height:115%'><b><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:#632423'>O </span></b><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:black'>206-285-7100</span><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:#BFAB7F'> </span><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:black'>| </span><b><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:#632423'>D</span></b><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:#A50021'> </span><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:black'>206-788-4577</span><span style='font-size:8.0pt;line-height:115%;font-family:"Verdana","sans-serif";color:#BFAB7F'><o:p></o:p></span></p><p class=MsoNormal style='margin-top:3.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.rushingco.com/"><b><i><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:#632423'>www.rushingco.com</span></i></b></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>CleanTech Analytics<br><b>Sent:</b> Thursday, March 01, 2012 7:08 AM<br><b>To:</b> John Aulbach<br><b>Cc:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] Green Roof - eQuest style<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#336666'>John,</span><o:p></o:p></p><div><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#336666'>I advise you to use a more modern software that has the ability to correctly simulate the effects of a Green Roof rather then some wacky eQuest work around. Professor David Sailor of Portland State University developed the Green Roof object for Energy Plus that uses a a finite difference algorithm and works well. The problem with </span>eQuest<span style='font-family:"Verdana","sans-serif";color:#336666'>/DOE2 is that it is based on a conduction transfer algorithm, and can not really emulate the effects of a Green Roof. If you need the easy to use inputs, I suggest Design Builder to generate the Energy Plus file. </span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#336666'>Best of luck, and feel free to ask if you need more about EP/DB..</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Thu, Mar 1, 2012 at 6:04 AM, John Aulbach <<a href="mailto:jra_sac@yahoo.com">jra_sac@yahoo.com</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal>OK, my fellow Raiders of the Lost BTU..<br><br>What would be your advice for developing a green roof in eQuest? I am sure some of you have gone through the USGBC with hopes of getting this approved.<br><br>I eagerly await your suggestions with thanks.<span style='color:#888888'><br><br><span class=hoenzb>John Aulbach</span><br><span class=hoenzb>Partner Energy</span></span><o:p></o:p></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Equest-users mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><p class=MsoNormal><i><span style='font-family:"Verdana","sans-serif";color:#999999'>Jeremiah D. Crossett</span></i><o:p></o:p></p><p class=MsoNormal><i><span style='font-family:"Verdana","sans-serif";color:#999999'>CleanTech Analytics</span></i><o:p></o:p></p><p class=MsoNormal><i><span style='font-family:"Verdana","sans-serif";color:#999999'>503-688-8951</span></i><o:p></o:p></p><div><p class=MsoNormal><a href="http://www.cleantechanalytics.com" target="_blank"><i><span style='font-family:"Verdana","sans-serif";color:#999999'>www.cleantechanalytics.com</span></i></a><o:p></o:p></p><div><p class=MsoNormal align=center style='text-align:center'><o:p> </o:p></p><p class=MsoNormal align=center style='text-align:center'><img border=0 id="_x0000_i1025" src="http://cleantechanalytics.com/images/stories/cleantech%20analytics%20120.PNG"><o:p></o:p></p></div></div><div><div><p align=center style='margin:0in;margin-bottom:.0001pt;text-align:center'><i><span style='font-size:8.5pt;font-family:"Droid Serif","serif";color:#CCCCCC;background:white'>This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics</span></i><b><o:p></o:p></b></p></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>