I have always sized the outdoor air to be the same in the proposed and baseline buildings. There is a section in Appendix G that specifically directs the modeler to do this. I have had a number of buildings approved using this method.<br>
<br>--<br>Karen<br><br><div class="gmail_quote">On Wed, Feb 24, 2010 at 9:06 AM, Tomlinson, Scott <span dir="ltr"><<a href="mailto:stomlinson@smma.com">stomlinson@smma.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p class="MsoNormal">Thank you to those who helped with my previous outside air
question. I now understand how the outside air is controlled, I’m
just not sure how I should be setting it. ASHRAE 90.1 – 2004 dictates
that the minimum outdoor air ventilation rates should be the same for the
design and baseline building, but one of our LEED review comments is that our
baseline model should be modeled base on ASHRAE 62.1 – 2004 requirements.
It seems that if I let eQuest size my OA based on ASHRAE 62.1 I won’t
match my design building OA rates (in this case, 100%). Also, if I let
eQuest size my OA based on the 100% OA rate of my design building I will be
over ASHRAE 62.1 requirements. </p>
<p class="MsoNormal">What method of outside air sizing have y’all been
using for your models, and have you been approved by USGBC with the method?</p>
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<p><span>-<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span>Thank you,</p>
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<p class="MsoNormal"><span style="font-size: 10pt; color: silver;">__________________________________________</span><span style="font-size: 10pt; color: silver;"></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt; color: black;">Scott Tomlinson, PE, LEED-AP</span></b><span style="font-size: 10pt; color: black;"></span></p>
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<p class="MsoNormal"><span style="font-size: 10pt; color: black;">Mechanical</span><span style="font-size: 10pt; color: black;"></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt; color: rgb(0, 64, 64);">Symmes Maini & McKee Associates, Inc.</span></b><span style="font-size: 10pt; color: rgb(0, 64, 64);"></span></p>
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<p class="MsoNormal"><span style="font-size: 10pt; color: black;">1000 Massachusetts Avenue, Cambridge, MA 02138</span><span style="font-size: 10pt; color: black;"></span></p>
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<p class="MsoNormal"><span style="font-size: 10pt; color: black;">t: 617.520.9438</span><span style="font-size: 10pt; color: black;"></span></p>
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<p class="MsoNormal"><span style="font-size: 10pt; color: black;">f: 617.354.5758</span><span style="font-size: 10pt; color: black;"></span></p>
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<p class="MsoNormal"><span style="font-size: 10pt; color: black;"><a href="mailto:STomlinson@smma.com" target="_blank"><span style="color: blue;">stomlinson@smma.com</span></a></span><span style="font-size: 10pt; color: black;"></span></p>
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<p class="MsoNormal"><span style="font-size: 10pt; color: black;"><a href="http://www.smma.com/" target="_blank"><span style="color: blue;">www.smma.com</span></a></span><span style="font-size: 10pt; color: black;"></span></p>
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