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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello Sefa,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This is a timely question – I needed this as a reminder for a couple active projects!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Anytime the SIM reports are unintuitive/confusing – be sure you’re aware of the following resource: <u>Help > Tutorials and Reference > Detailed Simulation Reports Summary</u><o:p></o:p></p><p class=MsoNormal><img width=565 height=261 id="_x0000_i1030" src="cid:image001.png@01D1EBD5.B1085610"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here, there are a number of clarifying notes concerning report LV-D specifically. To your case, if all frame widths are set to zero, then the difference between inputs and these outputs will be the OA film coefficient for a 7.5 mph (summer) windspeed:<o:p></o:p></p><p class=MsoNormal><img width=767 height=446 id="Picture_x0020_2" src="cid:image002.png@01D1EBD5.B1085610"><o:p></o:p></p><p class=MsoNormal>See the table located here in the DOE-2 help files for further information/documentation: <u>Volume 2: Dictionary > Envelope Components > GLASS-TYPE > GLASS-CONDUCTANCE (Table 11)</u><o:p></o:p></p><p class=MsoNormal align=center style='text-align:center'><img width=723 height=476 id="_x0000_i1028" src="cid:image007.jpg@01D1EBDC.6D1C03A0"><o:p></o:p></p><p class=MsoNormal>In summary, <b>do not equate the GLASS-CONDUCTANCE input with the assembly U-value</b>, when using simplified glass type inputs. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If you want to effect U-0.9 for the entire assembly, enter 1.23 for glass conductance in simplified window properties inputs. LV-D should then report 0.9 as the assembly U-value.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>At one point – I performed a curve-fit to find the coefficients to interpolate the above-cited table and shared with the list – see the email thread and image copied below. Until assembly U-value becomes an input option for Simplified glass type inputs <i>(feature-request, developers!)</i>, you could also calculate/automate GLASS-CONDUCTANCE with the following expression, referencing a global parameter:<o:p></o:p></p><p class=MsoNormal align=center style='text-align:center'><span style='font-family:Consolas;background:yellow;mso-highlight:yellow'>0.2535*#PA("ASSEMBLY-UVALUE")**3+0.101*#PA("ASSEMBLY-UVALUE")**2+1.0852*#PA("ASSEMBLY-UVALUE")-0.0117</span><span style='font-family:Consolas'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>~Nick<o:p></o:p></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#3A7A46'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#3A7A46'><img width=722 height=9 id="_x0000_i1027" src="cid:image003.png@01D1EBD5.B1085610"><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#3A7A46'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#3A7A46'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#3A7A46'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-family:"Arial","sans-serif";color:#3A7A46'>Nick Caton, P.E.</span></b><span style='color:#3A7A46'><o:p></o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=724 style='width:543.0pt;border-collapse:collapse'><tr><td width=230 valign=top style='width:172.3pt;padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Senior Energy Engineer</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Energy and Sustainability Services</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> North America Operations</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Schneider Electric</span><span style='color:#1F497D'><o:p></o:p></span></p></td><td width=291 valign=top style='width:218.3pt;padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>D </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>913.564.6361 </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>M </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>785.410.3317 </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>E </span><span style='color:#1F497D'><a href="mailto:nicholas.caton@schneider-electric.com"><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>nicholas.caton@schneider-electric.com</span></a></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>F </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>913.564.6380</span><span style='color:#1F497D'><o:p></o:p></span></p></td><td width=203 valign=top style='width:152.4pt;padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>15200 Santa Fe Trail Drive<br>Suite 204<br>Lenexa, KS 66219<br>United States</span><span style='color:#1F497D'><o:p></o:p></span></p></td></tr><tr style='height:4.0pt'><td width=724 colspan=3 valign=top style='width:543.0pt;padding:0in 0in 0in 0in;height:4.0pt'><p class=MsoNormal style='mso-line-height-alt:4.0pt'><span style='color:#3A7A46'><img border=0 width=722 height=49 id="Picture_x0020_3" src="cid:image004.png@01D1EBD5.B1085610" alt="cid:image001.png@01D189AB.58634A10"></span><span style='color:#3A7A46'><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>-----Original Message-----<br>From: Equest-users [mailto:equest-users-bounces@lists.onebuilding.org] On Behalf Of Sefa Sahin via Equest-users<br>Sent: Monday, August 01, 2016 8:47 AM<br>To: equest-users@lists.onebuilding.org<br>Subject: [Equest-users] Window U Value<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Dear All,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I am trying to model window with 0.9 U-value. When I use 0.9 U value on model, LV-D reports shows 0.709 U value (frame with = 0 ). What is the reason it ? Please find attached files.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks for all replies,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Sefa Sahin<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><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"'> Nicholas Caton [mailto:ncaton@catonenergy.com] <br><b>Sent:</b> Tuesday, December 23, 2014 3:43 PM<br><b>To:</b> Jones, Christopher; Omar ElRawy; equest<br><b>Subject:</b> RE: [Equest-users] Exterior Air Film - glazing<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>Chris:<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>After backtracking to the old glossary… I’ve learned something today! You are absolutely right, and thank you for pressing the point!<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I had the mistaken impression the U-values prescribed by 90.1 were exclusive of air films, analogous to GLASS-CONDUCTANCE. The LV-D reports, inclusive of the exterior air film (assuming a 7.5mph wind), actually ought match the prescribed gross assembly U-factor. I’ll be updating some of my personal resources!<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>For anyone else interested, here shared are coefficients for a curve matching the DOE2 reference for converting between the two:<o:p></o:p></span></p><p class=MsoNormal><img border=0 width=896 height=354 id="Picture_x0020_1" src="cid:image006.png@01D1EBD8.3DB60F60" alt="cid:image001.png@01D01EB5.D9D05F50"><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Omar, I’ll leave it to you to decide how to proceed. I have (successfully enough) addressed the exact same commentary multiple times by simply illustrating my inputs matched the prescribed values. My heart was in the right place, but I (and perhaps my reviewers) did not realize the disconnect with the output reports was not simply a matter of an erroneous inclusion of air films. I will be changing my ways moving forward, personally!<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Kind regards, and happy holidays to everyone on the list!<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>~Nick<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#1F497D'>NICK CATON, P.E.</span></b><span style='font-family:"Verdana","sans-serif";color:#1F497D'><br></span><b><span style='color:#561782'>Owner<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='color:#561782'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;color:#561782'>Caton Energy Consulting</span></b><span style='font-size:10.0pt;color:black'><br></span><span style='font-size:10.0pt;color:#1F497D'> 1150 N. 192<sup>nd</sup> St., #4-202<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'> Shoreline, WA 98133<br> office: 785.410.3317<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#561782'><a href="www.catonenergy.com"><span style='color:#561782'>www.catonenergy.com</span></a></span><span style='color:#561782'><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b>From:</b> Jones, Christopher [<a href="mailto:cjones@halsall.com">mailto:cjones@halsall.com</a>] <br><b>Sent:</b> Tuesday, December 23, 2014 5:33 AM<br><b>To:</b> Nicholas Caton; Omar ElRawy; equest<br><b>Subject:</b> RE: [Equest-users] Exterior Air Film - glazing<o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'>Nick,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'>Would you not agree that one should define the glazing Conductance in the eQuest input, not the glazing U-value? That way the .sim file reported glazing U-value is closer to what is expected? <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='color:#1C467A'>Christopher Jones</span></b><b><span style='font-size:10.0pt;color:#1C467A'>,</span></b><b><span style='font-size:10.0pt;color:#1F497D'> </span></b><span style='font-size:9.0pt;color:#1F497D'>P.Eng.</span><i><span style='font-size:10.0pt;color:#1F497D'> <br></span></i><span lang=EN-CA style='font-size:9.0pt;color:#1F497D'>Tel: 416.644.4226 • Toll Free: 1.888.425.7255 x 527</span><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'><o:p> </o:p></span></p><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"'> Nicholas Caton [<a href="mailto:ncaton@catonenergy.com">mailto:ncaton@catonenergy.com</a>] <br><b>Sent:</b> Monday, December 22, 2014 4:46 PM<br><b>To:</b> Jones, Christopher; Omar ElRawy; equest<br><b>Subject:</b> RE: [Equest-users] Exterior Air Film<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>The LV-D reports (and others touching on windows/constructions) do indeed include an exterior air film. I don’t know of a way to change that.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>A quick screengrab of your (correct) inputs and a one-line explanation of that fact is probably your most expedient path forward for a LEED review response.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>~Nick</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#1F497D'>NICK CATON, P.E.</span></b><span style='font-family:"Verdana","sans-serif";color:#1F497D'><br></span><b><span style='color:#561782'>Owner</span></b><o:p></o:p></p><p class=MsoNormal><b><span style='color:#561782'> </span></b><o:p></o:p></p><p class=MsoNormal><b><span style='font-size:10.0pt;color:#561782'>Caton Energy Consulting</span></b><span style='font-size:10.0pt;color:black'><br></span><span style='font-size:10.0pt;color:#1F497D'> 1150 N. 192<sup>nd</sup> St., #4-202</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'> Shoreline, WA 98133<br> office: 785.410.3317</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;color:#561782'><a href="www.catonenergy.com"><span style='color:#561782'>www.catonenergy.com</span></a></span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><b>From:</b> Equest-users [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Jones, Christopher<br><b>Sent:</b> Monday, December 22, 2014 8:23 AM<br><b>To:</b> Omar ElRawy; equest<br><b>Subject:</b> Re: [Equest-users] Exterior Air Film<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'>For glazing, you have to enter the GLASS-CONDUCTANCE into eQuest, not the glazing U-value. See page 65 in the DOE22Vol2-Dictionary reference manual available for download at <a href="http://doe2.com">doe2.com</a>.</span><o:p></o:p></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><b><span style='color:#1C467A'>Christopher Jones</span></b><b><span style='font-size:10.0pt;color:#1C467A'>,</span></b><b><span style='font-size:10.0pt;color:#1F497D'> </span></b><span style='font-size:9.0pt;color:#1F497D'>P.Eng.</span><i><span style='font-size:10.0pt;color:#1F497D'> <br></span></i><span lang=EN-CA style='font-size:9.0pt;color:#1F497D'>Tel: 416.644.4226 • Toll Free: 1.888.425.7255 x 527</span><o:p></o:p></p><p class=MsoNormal><span style='font-family:"Franklin Gothic Book";color:#1F497D'> </span><o:p></o:p></p><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 [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Omar ElRawy<br><b>Sent:</b> Monday, December 22, 2014 7:28 AM<br><b>To:</b> equest<br><b>Subject:</b> [Equest-users] Exterior Air Film</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Dear all,</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> I have a problem reporting baseline case for LEED submission, where the exterior walls and windows U-values in Report LV-D appears less than the ASHRAE G 90.1 values that I did enter to the model, and this is (as I think) because eQuest adds the exterior air-film effect to the assembly during the run. </span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>My question is that; can I disable this eQuest calculation to see my input directly in LV-D report or not?<br id=FontBreak></span><br>Thanks,<o:p></o:p></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Omar ElRawy</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>, <b>LEED AP BD+C<br></b>LEED Project Manager<br><span style='background:white'>EA Sustainable Building Consultants<br></span></span><a href="http://www.ea-buildingconsultants.com/" target="_blank"><span style='font-family:"Arial","sans-serif"'>http://www.ea-buildingconsultants.com/</span></a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>