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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>I changed the Make-up air temperature control to “Mixed Air Reset” and this solved the problems I had with Cooling and Fans. I took your advice with changing the control type and Delta T but the best I can do is reduce it to be 93% better than reference instead of 97%. I’ve tried fiddling with different options and am still having way too much heat being produced.<o:p></o:p></span></p><p class=MsoNormal><span style='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";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> Patrick J. O'Leary, Jr. [mailto:poleary1969@gmail.com] <br><b>Sent:</b> Thursday, June 07, 2012 2:55 PM<br><b>To:</b> Samantha MacHardy<br><b>Cc:</b> 'equest-users@lists.onebuilding.org'<br><b>Subject:</b> Re: [Equest-users] HRV Modelling<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>hrv/erv savings are all about controls. the default setting is on when system fans are on. this can easily cost you more money & energy than not having the erv at all. <br><br>if the project is not designed for the hrv to operate on a delta t between the exhaust air & outside air this isn't really obvious. i suggest changing the control type to delta t & try a few different amounts. 10 d f, 15 d f, 20 d f & see what the results are. these can also be set up with an eem so you don't have to keep changing the main system & seeing what the results are.<br><br>look in the march 2012 ashrae journal. there's an article explaining how to control a total energy wheel & the 2nd paragraph or so actually says an uncontrolled erv can result in more energy & more cost. though you only have an hrv the concepts in the article will still apply for heating mode of course.<br><br>On 6/7/12 9:16 AM, Samantha MacHardy wrote: <o:p></o:p></p><p class=MsoNormal>Hello! <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I’m working on modeling a Student Learning Centre and am having a bit of trouble with modeling an HRV. I go to the Air-Side HVAC and edit the Heat Recovery to say: <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Device Installed – Yes <o:p></o:p></p><p class=MsoNormal>Device Type: Sensible HX <o:p></o:p></p><p class=MsoNormal>Effectiveness: 0.7 <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>with everything else left as defaults to each of my systems. In my end results, my Domestic Hot Water and Space Heating are over 97% better, and my cooling is 50% worse than the reference. These numbers aren’t making sense but I can’t find much help anywhere with HRV in EQuest. Any help you could provide would be great!<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thanks!<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:green'>Samantha MacHardy</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:green'>, B. Arch. Sci.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:green'>Energy Analyst</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>Provident Energy Management Inc.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>T: 416-736-0630 x 2983 | <a href="mailto:smachardy@pemi.com">smachardy@pemi.com</a></span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br><br><o:p></o:p></span></p><pre>_______________________________________________<o:p></o:p></pre><pre>Equest-users mailing list<o:p></o:p></pre><pre><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><o:p></o:p></pre><pre>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></pre><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div></body></html>