Sambhav,<br><br>I agree with Varkie here. It is best to work with the design engineer and ask him/her what cfm/sf he/she is using for the space. It is usually different for exterior and interior spaces. <br><br>I would not suggest doing it at the system level, rather at the zone level. If you are not working with a design engineer, get yourself some resources and study up. Supply air is provided to offset loads to space, meet comfort needs of the occupants and to ensure a healthy environment. Hit and/or miss energy modeling, i.e., making changes to a model to get rid of hours outside a throttling range is not what you should be doing, and I know, we all do it sometimes. Far better, however, to try to figure out why those hours are there and fix them that way.<br>
<br>Finally, thanks for the elevated status but I am a Ms. Carol.<br><br>Best,<br><br>Carol<br><br><div class="gmail_quote">On Fri, Mar 4, 2011 at 8:35 AM, Varkie C Thomas <span dir="ltr"><<a href="mailto:thomasv@iit.edu">thomasv@iit.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Sabhav,<br>
The solution is not as simple as increasing the supply cfm/sqft to make the unmet hours disappear. 2-3 cfm/sqft in what type of building using what type of system? Do you have an egineering degree? You need to work with experienced engineers on real buildings before you can make decisions like this. I am copying this to Carol in case the message was not intended for me.<br>
<div class="im">Varkie<br>
<br>
----- Original Message -----<br>
From: sambhav tiwari <<a href="mailto:tiwari.sambhav@gmail.com">tiwari.sambhav@gmail.com</a>><br>
</div><div class="im">Date: Thursday, March 3, 2011 10:53 pm<br>
Subject: Re: [Bldg-sim] supply air rate<br>
<br>
</div>> Hi Mr Carol,<br>
> What i intended to ask was that when unmet hrs come<br>
> in results then to remove them i try to increase my supply fan cfm<br>
> which in turn increase supply cfm/sqft so then unmet hrs disappear but<br>
> my supply fan cfm/sqft goes up to 2-3cfm/sqft for some zones ,is this<br>
> range acceptable?<br>
><br>
> Thanks<br>
> Sambhav<br>
><br>
</blockquote></div><br><br clear="all"><br>-- <br>Carol Gardner PE<br>
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