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<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>These definitions came up during review of one of my recent LEED
projects. For future reference, 90.1 questions may be seen by a group
more keen to respond if you post to the [bldg-rate] list.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>I've got a definite position if you'd like to hear:<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>1. As you point out, per the definition of "<b><i>unconditioned
space</i></b>," parking garages are "…<u>not considered enclosed
spaces</u>." Whether in design it's actually conditioned or not has
no bearing on this statement.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>2. All of the definitions for space classifications, and indeed
the definition for "<b><i>space</i></b>," start with "an <u>enclosed
space</u>..." Therefore no parking garage can be considered "<b><i>conditioned</i></b>"
or "<b><i>semiheated</i></b>," or even as a "<b><i>space</i></b>."
<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>3. This also means by extension (re: section 5.1.2): There are
no envelope requirements for parking garages, as they are not "<b><i>spaces</i></b>"
of any classification.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'> <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>If you reject this approach and instead assert a parking garage
can be a "<b><i>conditioned space</i></b>," you'd be forced down a
path of assigning identical heating/cooling systems to parking garage spaces in
both proposed and baseline models, per Table G3.1.1.b, regardless of whether
it's actually conditioned or not. Things might get hairy if you're only
heating or only cooling (I believe the other would need to match the baseline
serving the rest of the floor/building, as may apply). I'd only suggest
that requiring heating/cooling of parking garages in all climates seems odd for
an energy efficiency standard - you'd have to explain that one to me ;).<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>If you do have heating and/or cooling for a parking garage
design, I'd personally stick with points #1/#2 above and simply model such energies
as a process load alongside any mechanical ventilation systems, identical in
both models. <o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>I personally use eQuest, and prefer to model parking garages as simply
as a series of building shades with a series of process/lighting loads attached
directly to the meter.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>All this is my take on the situation. I think it’s
pretty defensible, but there may have been CIR’s I’m unaware of to
the contrary – not that precedent matters anymore...<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>Hope that helps you and others,<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#002060'>~Nick<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#002060'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><img width=119 height=37 id="Picture_x0020_1"
src="cid:image001.jpg@01CBB667.2B7ADCB0" alt="cid:489575314@22072009-0ABB"><b><span
style='font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-size:12.0pt;
font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:7.5pt;color:#CC9900'>PROJECT ENGINEER<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>Smith &
Boucher Engineers</span><span style='font-size:7.5pt;font-family:"Times New Roman","serif";
color:#CC9900'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>25501 west
valley parkway<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>olathe ks 66061<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>direct 913
344.0036<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>fax 913
345.0617<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><a href="www.smithboucher.com"
title="blocked::www.smithboucher.com"><span style='font-size:10.0pt;color:blue'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;color:blue'> </span></u><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoPlainText>-----Original Message-----<br>
From: bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] On Behalf Of Richard Auffermann<br>
Sent: Monday, January 17, 2011 3:44 PM<br>
To: bldg-sim@lists.onebuilding.org<br>
Subject: Re: [Bldg-sim] ASHRAE 90.1 - Appendix G - Parking Garages<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>I have a questions about the modeling of Parking Garages
for ASHRAE 90.1 Appendix G energy model<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>As I was looking up the definition of a conditioned and
semi-heated space in Section 3 of ASHRAE 90.1 I noticed that under the
definition of an "unconditioned space" it states that
"Crawlspaces, attics, and parking garages with natural or mechanical
ventilation are not considered enclosed spaces." In addition the definition
of "ventilation" is "the process of supplying or removing air by
natural or mechanical means to or from any space. Such air is not required to
have been conditioned." Since the air is not required to be conditioned
then the air can or cannot be conditioned, does that mean that any parking
garage conditioned or unconditioned is not considered an enclosed space? If
that is true then how do you model a parking garage since all spaces are
defined as being enclosed?<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Richard Auffermann<o:p></o:p></p>
<p class=MsoPlainText>Design Engineer<o:p></o:p></p>
<p class=MsoPlainText>DAGHER ENGINEERING, PLLC<o:p></o:p></p>
<p class=MsoPlainText>29 Broadway, New York, NY 10006<o:p></o:p></p>
<p class=MsoPlainText>T. 212.480.2591 x122<o:p></o:p></p>
<p class=MsoPlainText>F. 212.480.2654<o:p></o:p></p>
<p class=MsoPlainText>rauffermann@dagherengineering.com<o:p></o:p></p>
<p class=MsoPlainText>www.dagherengineering.com<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Save Trees, Consider the Environment. Please print only
when necessary.<o:p></o:p></p>
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<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>_______________________________________________<o:p></o:p></p>
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