<div>I think it also depends on the software you are using to model a fume hood. Because if exhaust is specified more than the supply due to the hood, the software may disregard the lower supply and equate the higher value of exhaust to the supply. I am also trying to model a VAV exhaust fume hood and facing a lot of problems doing it. So you have to figure out a way to control you exhaust by altering your VAV supply.</div>
<div>If you know some other way, please let me know also :)<br><br></div>
<div class="gmail_quote">On Tue, Aug 31, 2010 at 2:23 PM, Sami, Vikram <span dir="ltr"><<a href="mailto:Vikram.Sami@perkinswill.com">Vikram.Sami@perkinswill.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">I think that depends on the total volume of exhaust. I don't have it in front of me, but I think if your exhaust is more than a certain amount you have to have either energy recovery to fifty percent or vav flow.<br>
<br>Sent from a mobile device<br><br> -----Original Message-----<br>From: Peter Simmonds [mailto:<a href="mailto:peter.simmonds@ibece.net">peter.simmonds@ibece.net</a>]<br>Sent: Tuesday, August 31, 2010 12:09 PM Central Standard Time<br>
To: <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>Subject: [Bldg-sim] Modeling fume hood exhausts<br><br>Can anyone tell me when modeling a lab system with fume hoods as to whether the baseline systems are to be modeled as constant volume?<br>
<br>(subsequent alternatives will have variable volume fume hoods).<br><br><br><br>Peter Simmonds,Ph.D.<br>Senior Associate<br><br>IBE Consulting Engineers<br>14130 Riverside Drive, Suite 201<br>Sherman Oaks, CA 91423<br>
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