<font color="#3366ff"><font face="tahoma,sans-serif">Dear Nimesh,</font></font><div><font color="#3366ff"><font face="tahoma,sans-serif"><br></font></font></div><div><font color="#3366ff"><font face="tahoma,sans-serif">For baseline refer </font></font><span style="font-family:tahoma,sans-serif;color:rgb(51,102,255)">G3.1.3.13 VAV Minimum Flow Setpoints (Systems 5 </span><span style="font-family:tahoma,sans-serif;color:rgb(51,102,255)">and 7). Minimum volume setpoints for VAV reheat boxes </span><span style="font-family:tahoma,sans-serif;color:rgb(51,102,255)">shall be 0.4 cfm/ft2 of floor area served or the minimum ventilation </span><span style="font-family:tahoma,sans-serif;color:rgb(51,102,255)">rate, whichever is larger.</span></div>
<div><font color="#3366ff"><font face="tahoma,sans-serif"><br></font></font></div><div><font color="#3366ff"><font face="tahoma,sans-serif">For proposed it depends on the Internal load of the space. For zone with high internal load you may need to increase your CFM upto 1-1.2 CFM.Sqft. OR you can also give direct supply CFM as per design and make sure you also includes altitude factor in your inputs.</font></font></div>
<div><font color="#3366ff"><font face="tahoma,sans-serif"><br></font></font></div><div><font color="#3366ff"><font face="tahoma,sans-serif">Thanks! <br></font></font><br><div class="gmail_quote">On Fri, Aug 3, 2012 at 2:00 AM, nimesh.prajapati <span dir="ltr"><<a href="mailto:nimesh.prajapati@hitechcaddservices.com" target="_blank">nimesh.prajapati@hitechcaddservices.com</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-IN" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="color:navy">Dear Javed,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">Can you please help me?<u></u><u></u></span></p><p class="MsoNormal"><span style="color:navy">This refers to the Minimum design airflow in e-QUEST for Baseline and Proposed design.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">I am still not confident how to calculate minimum design airflow for baseline and Proposed model.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:navy">Minimum Design Air Flow is used to set a "floor" (i.e., minimum) on the design air flow supplied to each space. This is not to be confused with <a><span style="color:navy;text-decoration:none">VAV Minimum Air Flow</span></a>. Minimum Design Air Flow pertains to air flow at design (maximum) conditions. VAV Minimum Air Flow indicates how far closed hourly air flow can modulate under low load (off-design) conditions. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">The default Minimum Design Air Flow is based on <a><span style="color:navy;text-decoration:none">System Type</span></a>. If <a><span style="color:navy;text-decoration:none">Zoning Pattern</span></a> = "Perimeter/Core", then two Minimum Design Air Flows are available, one for core zones, the other for perimeter zones. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">Minimum Design Air Flow can have a profound impact on fan energy use if set too high. Note that this is used to set a "floor" or minimum on the design air flow supplied to each space. If the HVAC design performed by the simulation finds that more airflow than the Minimum Design Air Flow is necessary, it will specify the necessary design air flow rate. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">Conventional HVAC design often delivers air to spaces at a rate of about 1.0 CFM/sqft. When sizing air flow only to meet load requirements, it is not uncommon for a simulation program to find that design flow rates less than 0.5 CFM/sqft are adequate for lightly loaded spaces (e.g., some core spaces, circulation spaces, etc.). It is common practice to provide at least 0.5 CFM/sqft to each space to insure adequate ventilation and air movement for comfort. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">The default value in e-QUEST is 0.50 cfm/sqft.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:navy">I had gone through ASHRAE 90.1 guidelines but unable to find it.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">Can you please guide me?<u></u><u></u></span></p><p class="MsoNormal"><span style="color:navy">Thanks,</span><span style="font-family:"Times New Roman","serif";color:navy"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:navy"> <u></u><u></u></span></p><p class="MsoNormal"><span style="color:navy">Nimesh Prajapati</span><span style="font-family:"Times New Roman","serif";color:navy"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman","serif";color:navy"> <u></u><u></u></span></p><p class="MsoNormal"><span style="color:navy">(+91 9687133492)</span><span style="font-family:"Times New Roman","serif";color:navy"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:navy">HVAC Design Engineer & Energy Modeller</span><span style="font-family:"Times New Roman","serif";color:navy"><u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:10.0pt;color:navy"><u></u> <u></u></span></p></div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div style="TEXT-ALIGN:left"><span style="BACKGROUND-COLOR:rgb(51,51,255)"><font face="verdana, sans-serif"><font style="BACKGROUND-COLOR:#ffffff"></font><br>
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<div style="text-align:center"><font style="background-color:rgb(255,255,255)" face="tahoma, sans-serif">Javed Iqbal, LEED AP, CEA</font></div>
<div style="text-align:center"><font style="background-color:rgb(255,255,255)" face="tahoma, sans-serif"><font>Energy Analyst </font><font> </font></font></div></font></font><font color="#3366ff">
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