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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-family:"Calibri","sans-serif";color:#1F497D'>Paul,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>If you right-click and select “Edit/View User Default” it shows values for four of the five ERV types. For heat pipes, there is no default value, so you need to pull one out of your, um, hat.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Calibri","sans-serif";color:#1F497D'>Bill<o:p></o:p></span></p><p class=MsoNormal><span style='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"'> Paul Diglio [mailto:paul.diglio@sbcglobal.net] <br><b>Sent:</b> Friday, June 03, 2011 11:58 AM<br><b>To:</b> Bishop, Bill; BLafley; equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] Heat Recovery question<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'>I have the same question as Bill Lafley.<br><br>Once you enter the type of ERV, the eQuest defaults disappear. The program then asks for the inputs.<br><br>Paul Diglio<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p><div><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt'><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"'> "Bishop, Bill" <wbishop@pathfinder-ea.com><br><b>To:</b> BLafley <BLafley@cetonline.org>; equest-users@lists.onebuilding.org<br><b>Sent:</b> Fri, June 3, 2011 11:21:07 AM<br><b>Subject:</b> Re: [Equest-users] Heat Recovery question</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><div><p class=MsoPlainText>Bill,<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>I would just use the eQUEST defaults for whichever ERV-RECOVER-TYPE is applicable. The variables I would focus on are the sensible, and if appropriate, latent effectiveness, as well as the ERV-OA-FLOW and ERV-EXH-FLOW. The effectiveness and/or efficiency are provided by the HRV/ERV manufacturer. Note that "efficiency" and "effectiveness" mean different things, and if you enter the efficiency in eQUEST instead of sensible/latent effectiveness you will underestimate the energy savings. See HVI (Home Ventilation Institute), Section 3, page two:<o:p></o:p></p><p class=MsoPlainText><a href="http://www.hvi.org/resourcelibrary/proddirectory.html" target="_blank">http://www.hvi.org/resourcelibrary/proddirectory.html</a><o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>The manufacturer might have values for the air film resistance fraction and exponent, but don't count on it. These values modify the effectiveness based on hourly OA and exhaust airflows, so they won't even matter unless the hourly airflows through the ERV/HRV change significantly.<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>Regards,<o:p></o:p></p><p class=MsoPlainText>Bill<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoNormal><img border=0 width=496 height=123 id="Picture_x0020_1" src="cid:image001.jpg@01CC21E6.75FF92E0" alt="Signature in jpg form"><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoPlainText>-----Original Message-----<br>From: equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] On Behalf Of BLafley<br>Sent: Thursday, June 02, 2011 4:59 PM<br>To: equest-users@lists.onebuilding.org<br>Subject: [Equest-users] Heat Recovery question<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>Hello,<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>Can someone tell me where I get the following values and/or what are <o:p></o:p></p><p class=MsoPlainText>reasonable numbers for these inputs? "HX Air Film Resist." and "Air <o:p></o:p></p><p class=MsoPlainText>Film Resist Exp."<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>Thanks,<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>-- <o:p></o:p></p><p class=MsoPlainText>Visit us online! <<a href="http://www.cetonline.org" target="_blank">http://www.cetonline.org</a>><o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>Bill Lafley <mailto:blafley@cetonline.org> | Energy Analyst<o:p></o:p></p><p class=MsoPlainText>Center for EcoTechnology | 320 Riverside Drive - 1A | Florence MA 01062<o:p></o:p></p><p class=MsoPlainText>413-586-7350 ext. 222 | 413-695-2730 (cell)<o:p></o:p></p><p class=MsoPlainText><a href="http://www.cetonline.org" target="_blank">www.cetonline.org</a> <<a href="http://www.cetonline.org" target="_blank">http://www.cetonline.org</a>> | Sign up for EcoUpdates! <o:p></o:p></p><p class=MsoPlainText><<a href="http://www.cetonline.org/Mailist/VR_Signup.php" target="_blank">http://www.cetonline.org/Mailist/VR_Signup.php</a>><o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>_______________________________________________<o:p></o:p></p><p class=MsoPlainText>Equest-users mailing list<o:p></o:p></p><p class=MsoPlainText><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><o:p></o:p></p><p class=MsoPlainText>To unsubscribe from this mailing list send a blank message to EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG<o:p></o:p></p></div></div></div></div></div></body></html>