<div>Thank you Carol!</div>
<div> </div>
<div>I modified "Min Design Flow(cfm/ft2) .</div>
<div> </div>
<div>However, "insufficient heating" warning is keep showing. </div>
<div> </div>
<div>Only thing seems to work to solve this problem is to increase heating capacity is Reheat delta T.</div>
<div>(Its system is VAV with Reheat).</div>
<div> </div>
<div>What I can't understand the most is that specifying heating capacity of main heating coil doesn't </div>
<div> </div>
<div>affect the heating capacity anyhow.</div>
<div> </div>
<div>Any thoughts on this anyone???</div>
<div> </div>
<div>Thank you!</div>
<div> </div>
<div>DE</div>
<div> </div>
<div class="gmail_quote">2011/7/25 Carol Gardner <span dir="ltr"><<a href="mailto:cmg750@gmail.com">cmg750@gmail.com</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Hi DE,<br><br>If you look around at all the defaults you will probably find that somewhere eQUEST is defaulting to 0.5 cfm/sf for your supply air. This is often insufficient to meet your heating/cooling requirements. Things I have done in the past to fix this is to use the same cfm/sf as the proposed building uses, or look in the little ASHRAE Pocket Guide for what they recommend for your building type. These two numbers will likely be similar<br>
<br>Carol. <br>
<div>
<div></div>
<div class="h5"><br>
<div class="gmail_quote">On Sun, Jul 24, 2011 at 5:16 PM, DongEun Kim <span dir="ltr"><<a href="mailto:equested@gmail.com" target="_blank">equested@gmail.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div>Thank you John,</div>
<div> </div>
<div>But isn't airflow supposed to be auto-sized if not specified?</div>
<div> </div>
<div>I intentionally leave the flowrate blank to let the program calculate the cfm that serves load the best.</div>
<div> </div>
<div>Should still I specifiy cfm?</div>
<div> </div>
<div>DE<br><br></div>
<div class="gmail_quote">2011/7/23 John Aulbach <span dir="ltr"><<a href="mailto:jra_sac@yahoo.com" target="_blank">jra_sac@yahoo.com</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div>
<div style="BACKGROUND-COLOR: #fff; FONT-FAMILY: times new roman, new york, times, serif; COLOR: #000; FONT-SIZE: 12pt">
<div><span>Try increasing airflow.<var></var><br></span></div>
<div><br></div>
<div style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt">
<div style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt"><font size="2" face="Arial">
<div style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; MIN-HEIGHT: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" readonly>
</div><b><span style="FONT-WEIGHT: bold">From:</span></b> DongEun Kim <<a href="mailto:equested@gmail.com" target="_blank">equested@gmail.com</a>><br><b><span style="FONT-WEIGHT: bold">To:</span></b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style="FONT-WEIGHT: bold">Sent:</span></b> Friday, July 22, 2011 12:13 AM<br><b><span style="FONT-WEIGHT: bold">Subject:</span></b> [Equest-users] insufficient heating capability<br></font>
<div>
<div></div>
<div><br>
<div>
<div>Hi eQuesters!</div>
<div> </div>
<div>Can anyone help me here?</div>
<div> </div>
<div>I installed main heating coil as well as reheat coil with delta T=30.</div>
<div> </div>
<div>Heating capacity and cfm is not defined so that they will be auto-sized.</div>
<div> </div>
<div>
<div>And, I keep having this warning saying that the system "might have insufficient heating capability."</div>
<div> </div>
<div>
<div>I increased "Zone Entering Max Supply Temp", "Hot Deck Max Leaving Temp." But, the problem stays.</div>
<div> </div>
<div> </div>
<div>How do I increase the heating capability?</div>
<div>Thank you !!</div>
<div> </div>
<div>DE</div></div>
<div> </div>
<div><br> </div></div>
<div> </div></div><br></div></div>_______________________________________________<br>Equest-users mailing list<br><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><br>
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<br></div></div><font color="#888888">-- <br>Carol Gardner PE<br>
<div></div></font></blockquote></div><br>