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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'>Does adding a Low-E film improve the U-factor, or just reduce the emissivity? Maybe posting some of the Window5 information up here will help us understand the performance increase/troubleshoot what’s happened.<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'>Cheers,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Alex<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-family:"Calibri","sans-serif";color:#262F13'>Alex Krickx, LEED AP<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:gray'>Building Energy Specialist<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><img width=121 height=42 id="Picture_x0020_1" src="cid:image001.jpg@01CC1C57.25B2D070" alt="email_sig"></span><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:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>1250 Elko Dr, Sunnyvale, CA 94089<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>(t) 408.541.8124<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:gray'><o:p> </o:p></span></p><p class=MsoNormal><b><i><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D'>Warning:</span></i></b><i><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D'> The information contained in this e-mail may be privileged attorney-client communications or attorney work product and/or proprietary and confidential. If the reader of this message is not the intended recipient then you have received it in error and any review, distribution or copying of this message is prohibited and you are to notify us immediately by reply e-mail and delete the original message immediately.</span></i><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'><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'><o:p> </o:p></span></p><div><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>MattDubrovich@Eaton.com<br><b>Sent:</b> Friday, May 27, 2011 10:14 AM<br><b>To:</b> danielk@arborus.ca; Mike.McAardle@state.vt.us<br><b>Cc:</b> equest-users@lists.onebuilding.org; draphael@IDS-TROY.COM<br><b>Subject:</b> Re: [Equest-users] Low-E Window Film<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Low-e films reflect heat back into the space based on their emissivity so you can expect heating savings even with a lower SHGC. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I’d expect Window5 to include the correct emissivity and for that to be passed through the glass definition to eQuest. Is the film on the correct surface in Window5? If you were entering your glass in eQuest using the simplified method you would have to change the emissivity manually. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Though this is from the manufacture, it’s still an interesting read: <a href="http://www.enerlogicfilm.com/pdf/EnerLogic-White-Paper.pdf">http://www.enerlogicfilm.com/pdf/EnerLogic-White-Paper.pdf</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Matt Dubrovich </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><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>Daniel Knapp<br><b>Sent:</b> Friday, May 27, 2011 9:23 AM<br><b>To:</b> McArdle, Mike<br><b>Cc:</b> equest-users@lists.onebuilding.org; Dan Raphael<br><b>Subject:</b> Re: [Equest-users] Low-E Window Film<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On 2011-05-27, at 11:05 AM, McArdle, Mike wrote:<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dan, Do You mean decreasing the heat load ( not increasing ) </span><o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>If the solar heat gain is reduced in winter, less heat from the sun will enter the windows and the heating load will be increased. <o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thank you, Sincerely,</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Michael J. McArdle , P.E.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Buildings Engineer II, Project Manager</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>State of Vermont,</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Buildings and General Services (BGS)</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>2 Governor Aiken Avenue</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Montpelier, Vt. 05633</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Office: 802-828-5650; cell: 802-272-4828</span><o:p></o:p></p></div></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in;border-width:initial;border-color:initial'><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span class=apple-converted-space><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> </span></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a><span class=apple-converted-space> </span>[mailto:equest-users-bounces@lists.onebuilding.org]<span class=apple-converted-space> </span><b>On Behalf Of<span class=apple-converted-space> </span></b>Daniel Knapp<br><b>Sent:</b><span class=apple-converted-space> </span>Friday, May 27, 2011 11:01 AM<br><b>To:</b><span class=apple-converted-space> </span>Raphael, Dan<br><b>Cc:</b><span class=apple-converted-space> </span><a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br><b>Subject:</b><span class=apple-converted-space> </span>Re: [Equest-users] Low-E Window Film</span><o:p></o:p></p></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>How does the film affect the U-value and the SHGC for the window? It sounds like the film is reducing the solar heat gain coefficient, and increasing the heating load. You should also keep in mind that outdoor air loads can dominate the heating load in winter and that envelope effects can be minimal depending on the climate and type of building. You may want to look into the loads reports in the SIM file to see what effects the film has on the building cooling and heating loads.<o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Cheers,<o:p></o:p></p></div></div><div><div><p class=MsoNormal>Dan<o:p></o:p></p></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div><div><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span class=apple-style-span><span style='font-size:13.5pt;font-family:"Verdana","sans-serif";color:black'>—</span></span><span style='font-size:13.5pt;font-family:"Verdana","sans-serif";color:black'><br><span class=apple-style-span>Daniel Knapp, PhD, LEED® AP O+M</span><br><span class=apple-style-span><a href="mailto:danielk@arborus.ca">danielk@arborus.ca</a></span><br><br><span class=apple-style-span>Arborus Consulting</span><br><span class=apple-style-span>Energy Strategies for the Built Environment</span><br><span class=apple-style-span><a href="http://www.arborus.ca/">www.arborus.ca</a></span><br><span class=apple-style-span>76 Chamberlain Avenue </span><br><span class=apple-style-span>Ottawa, ON, K1S 1V9 </span><br><span class=apple-style-span>Phone: (613) 234-7178 ext. 113</span><br><span class=apple-style-span>Fax: (613) 234-0740</span><br><br><br><br></span><o:p></o:p></p></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><div><div><p class=MsoNormal>On 2011-05-27, at 10:42 AM, Raphael, Dan wrote:<o:p></o:p></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br><br><o:p></o:p></p></div><div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Has anybody successfully modeled window film installation using eQuest? Specifically, I am trying to model the Vista EnerLogic low-e film (since it is eligible for tax incentives). I’ve used Optics5/Window5 to construct the glass type using the EnerLogic applied film (NFRC ID# 2545) and imported that into eQuest. When I test this retrofit in a sample building, the savings are not what I expect (~65 yr. payback, assuming $7 installed cost). I would expect to see a payback somewhere around 10-15 years. What bothers me is that in the model, the heating load increases, which would be expected for a typical window film, but this film claims to have savings in all seasons due to the ability to trap heat in the building. If anybody has had any success in modeling these window films and could provide me with step-by-step instructions or any guidance, it’d be greatly appreciated.</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Thanks!</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Book Antiqua","serif"'>Dan Raphael</span></b><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Berlin Sans FB","sans-serif"'>Building Performance Analyst</span><o:p></o:p></p></div></div><p class=MsoNormal style='margin-top:3.0pt'><b><span style='font-size:10.0pt;font-family:"Book Antiqua","serif"'>Integrated<span class=apple-converted-space> </span><span style='color:red'>Design Solutions</span></span></b><o:p></o:p></p><p class=MsoNormal style='margin-bottom:3.0pt'><span style='font-size:9.0pt;font-family:"Berlin Sans FB","sans-serif"'>Architecture, Engineering, Interiors & Technology</span><o:p></o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Berlin Sans FB","sans-serif"'>1441 W. Long Lake, Suite 200</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Berlin Sans FB","sans-serif"'>Troy, Michigan 48098</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Berlin Sans FB","sans-serif"'>tel: 248.823.2171</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Berlin Sans FB","sans-serif"'>fax: 248.823.2200</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a href="http://www.ids-troy.com/"><span style='font-family:"Berlin Sans FB","sans-serif"'>www.ids-troy.com</span></a></span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Century Gothic","sans-serif"'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><a href="http://www.energystar.gov/"><span style='color:windowtext;text-decoration:none'><image001.png></span></a></span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span><o:p></o:p></p></div></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Verdana","sans-serif"'>_______________________________________________<br>Equest-users mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>To unsubscribe from this mailing list send a blank message to<span class=apple-converted-space> </span><a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a></span><o:p></o:p></p></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>