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<p class=MsoNormal><span style='color:#1F497D'>If it’s going to make a
big difference in terms of LEED points, run an estimate of how big of a deal it
is (in credits), and explain the situation to your architect to see whether the
building’s gross area can be recalculated to be 800 SF less (or whatever
the difference may be considering unconditioned space). For LEED v3/2009,
you are being checked against the gross area as it’s pulled from some
other credit template (I’m not sure which, but it’s one our
architects typically fill out), so it’s on her/him to determine your
baseline system, ultimately. This total is reflected on the EA prereq 2
template, first page.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I’ve used “non-predominant
conditions,” per G.3.1.1.a, to model two baseline system types in one
case. It was a large (>100,000 SF) building with about 40,000 SF of “residential”
sleeping areas (baseline System 1) and 60,000+ SF of Office/Classroom area (using
baseline System 3). The text in parentheses in G.3.1.1.a tells us
you can go that route if you have >20,000 SF using a different heating source
(gas vs. electric) or with a different occupancy type (residential/non-residential).<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>As a practice, I personally do not
count on a LEED reviewer ever siding with me in a way that would earn
points. Not to say that hasn’t happened before, but I wouldn’t
plan on it. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>~Nick<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='color:#1F497D'><img width=119 height=37
id="Picture_x0020_1" src="cid:image001.jpg@01CB3287.62EA7F20"
alt="cid:489575314@22072009-0ABB"></span><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</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><i><span style='font-size:10.0pt;color:#2D4D5E'>Check out
our new web-site @ </span></i><span style='color:#1F497D'><a
href="www.smithboucher.com" title="blocked::www.smithboucher.com"><span
style='font-size:10.0pt'>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>
</div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-rate-bounces@lists.onebuilding.org
[mailto:bldg-rate-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Cara
Martin<br>
<b>Sent:</b> Monday, August 02, 2010 9:15 AM<br>
<b>To:</b> Dana Troy<br>
<b>Cc:</b> bldg-rate@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-rate] Baseline System Selection for Energy Modeling
forLEEDEAc1<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>What’s the best course of
action if I don’t have enough unconditioned space to get below 25,000 sf?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><i><span style='color:#1F497D'>Cara Martin, </span></i><span
style='font-size:10.0pt;color:#1F497D'>LEED AP BD+C</span><i><span
style='color:#1F497D'><o:p></o:p></span></i></p>
<p class=MsoNormal><b><span style='color:#1F497D'>Novus Engineering, P.C.<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;color:#1F497D'>25 Delaware
Ave.<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;color:#1F497D'>Delmar, New
York 12054<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>518.439-8235<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>518.439-8592
(fax)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>CMartin@novusengineering.com<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Dana Troy
[mailto:DTroy@glumac.com] <br>
<b>Sent:</b> Monday, August 02, 2010 10:10 AM<br>
<b>To:</b> Cara Martin<br>
<b>Subject:</b> RE: [Bldg-rate] Baseline System Selection for Energy Modeling
for LEEDEAc1<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>Per App G, it is 25k of <u>conditioned</u>
space, so find some unconditioned space in your building and justify removing
it from the square footage calculations. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>-Dana<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-family:"Arial Narrow","sans-serif";
color:#1F497D'>Dana Troy<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial Narrow","sans-serif";
color:#1F497D'>Senior Energy Analyst<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial Narrow","sans-serif";
color:#1F497D'>GLUMAC | 503.227.5280<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Cara Martin
[mailto:CMartin@novusengineering.com] <br>
<b>Sent:</b> Monday, August 02, 2010 7:09 AM<br>
<b>To:</b> bldg-rate@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-rate] Baseline System Selection for Energy Modeling for
LEEDEAc1<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hello,<o:p></o:p></p>
<p class=MsoNormal>I am curious of others’ experiences with the
USGBC/GBCI in terms of modeling review of the baseline system selection for
EAc1 under LEED 2009 (v3) using ASHRAE 90.1-2007, Appendix G. I am
currently modeling a roughly 25,000 square foot, 2-story building to be used
for light commercial and retail space. The building is pursuing Core
& Shell certification and will house multiple tenants. The HVAC
system for the proposed building will be packaged roof top units with natural
gas-fired furnaces and DX cooling. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>As per Appendix G, the HVAC system for the baseline building
is determined by size and number of stories as follows:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Nonresidential and 3 floors or less and < 25,000
s.f. = System 3 (packaged RTU, constant volume, DX cooling, fossil fuel
furnace)<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Nonresidential and 4-5 floors and < 25,000 s.f. OR 5
floors or less and 25,000 – 15,000 s.f. = System 5 (packaged VAV with
reheat)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My building is 2-stories and just barely over 25,000 s.f.
(maybe 25,800 s.f. tops). I would much prefer to model the baseline as
System 3 as this would more closely resemble the proposed building and provide
a more realistic means of comparison. Under Table G3.1.1A, it states that
“where attributes make a building eligible for more than one baseline
system type, use the predominant condition to determine the system type for the
entire building.” How is the predominant condition
determined? Can I claim that the height of the building (2 stories) is
more important than the square footage? Or will the USGBC/GBCI require
that I use System 5 as the baseline because I’m even one square foot over
the 25,000 threshold? <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any input from others in a similar predicament would be most
appreciated.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thank you,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><i>Cara Martin, </i><span style='font-size:10.0pt'>LEED AP
BD+C</span><i><o:p></o:p></i></p>
<p class=MsoNormal><b>Novus Engineering, P.C.<o:p></o:p></b></p>
<p class=MsoNormal><b><span style='font-size:10.0pt'>25 Delaware Ave.<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:10.0pt'>Delmar, New York 12054<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt'>518.439-8235<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'>518.439-8592 (fax)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'>CMartin@novusengineering.com<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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