Examine your ERV-TEMP-CTRL setpoint. If it's set to float you can end up overshooting your mixed air temperature setpoint and having to recool the air. <div><br></div><div>Also, ERV-RUN-CTRL should be set to WHEN-MIN-OA or one of the OA-EXHAUST-DT/DH options for maximum energy savings.</div>
<div><br></div><div>That being said, eQUEST's ERV algoirthm has never given me good results. I've had a lot of trouble showing savings and have experienced similar issues as you describe.</div><div><br></div><div>
Check your hourly reports for the system. There are a number of parameters related to ERV's that you can monitor and check to see if its working as intended.</div><div><br></div><div><img src="cid:ii_13b531b20a24ac08" alt="Inline image 2"><br>
</div><div><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Nov 30, 2012 at 11:59 AM, Andrew Clagett <span dir="ltr"><<a href="mailto:AndrewC@hargis.biz" target="_blank">AndrewC@hargis.biz</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">Hello all. After finalizing my building and obtaining what appeared to be reasonable output, I removed the ERV devices (modeled at 85% efficient cross-flow air to air heat exchangers) from the model to ascertain the energy savings attributable to those devices.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">And my total energy consumption went <b>DOWN</b> over 6%! Inexplicably, ‘space cooling’ and ‘pumps & aux.’ energy consumption has decreased by a far larger amount than ‘space heating’ increased. I would have expected both of those values to increase along with the ‘space heating’ energy consumption (which did increase).<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Anyone have any idea why that might be?<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal"><b><span style="font-size:11.5pt;color:#244061">Andrew Clagett, </span></b><span style="font-size:9.0pt;color:gray">PE, LEED AP <u></u><u></u></span></p>
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