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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have taken credit for exterior lighting
savings in the past, and it was never challenged. I believe the non-tradable
surfaces statement in Chapter 6 only applies when you are complying with
90.1-2004 via the prescriptive method. Any time you move to the performance
method, you can trade off your exterior lighting with other things such as
mechanical and interior lighting. For LEED energy modeling, your design must
meet all mandatory requirements of 90.1-2004, but not all prescriptive requirements.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The way I have approached this in the past
was to calculate allowed exterior power for each type of exterior lighting
(based on the areas being lit in the Proposed design) and sum the total kW + 5%
(Section 9.4.5 of 90.1-2004). Then, I modeled the actual kW in the Proposed
design.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Again, I have never been challenged on
this, but I am not certain that this is the correct approach.<o:p></o:p></span></font></p>
<div>
<p><b><font size=3 color="#333333" face=Arial><span style='font-size:12.0pt;
font-family:Arial;color:#333333;font-weight:bold'>Kendra Tupper</span></font></b><font
color=navy><span style='color:navy'><br>
</span></font><i><font color=gray face=Arial><span style='font-family:Arial;
color:gray;font-style:italic'>LEED® AP</span></font></i><font color=navy><span
style='color:navy'><br>
</span></font><b><font color="#333333" face=Arial><span style='font-family:
Arial;color:#333333;font-weight:bold'>FLACK</span></font><font color=navy><span
style='color:navy'> </span></font></b><b><font color="#969696" face=Arial><span
style='font-family:Arial;color:#969696;font-weight:bold'>+</span></font></b><b><font
color="#333333" face=Arial><span style='font-family:Arial;color:#333333;
font-weight:bold'> KURTZ</span></font></b><font color=navy><span
style='color:navy'><br>
</span></font><st1:address w:st="on"><st1:Street w:st="on"><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>405 Howard St.</span></font></st1:Street><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'> <st1:City
w:st="on">San Francisco</st1:City>, <st1:State w:st="on">CA</st1:State> <st1:PostalCode
w:st="on">94105</st1:PostalCode></span></font></st1:address><font color=navy><span
style='color:navy'><br>
</span></font><font size=2 color=gray face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:gray'>Direct</span></font><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>
(415) 402-5840</span></font><font color=navy><span style='color:navy'><br>
</span></font><font size=2 color=gray face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:gray'>Email </span></font><font color=navy><span
style='color:navy'> <a href="mailto:kendra.tupper@sf.fk.com%20"><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>kendra.tupper@sf.fk.com</span></font></a></span></font><o:p></o:p></p>
</div>
<div>
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<p class=MsoNormal style='line-height:normal'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Fred Porter<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, September 28, 2007
8:22 AM<br>
<b><span style='font-weight:bold'>To:</span></b> BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [BLDG-SIM] Exterior Ltg
& LEED EA Credit 1</span></font><font size=3><span style='font-size:12.0pt'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I'm confused as to whether any exterior lighting power can
differ between the proposed & baseline models. Any one have any experience
from EA Cr1 submissions?</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The Users Manual for App G states at the end of the
"Baseline Lighting" Section, ".... credit may be taken for
improvements in exterior lighting efficacy or wattage... the proposed building
can take credit for a more efficient system." So proposed parking lot
lighting at 0.08 W/sf or whatever would be compared to a baseline of parking
lot lighting at 0.15 W/sf. I believe façade lighting must be the same in both,
as these are "non-tradable surfaces" in Chapter Six.</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>But an apparently poorly-considered Credit Ruling from
4/25/07 simply states "No. Appendix G does not allow trade-offs for
exterior lighting," directly contradicting the UM.</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Perhaps a post like this should be on the USGBC "engineers"
"member-to-member" forum, but I don't see much traffic there. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>--</span></font> <o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Fred W. Porter, B.S., LEED A.P.<br>
Senior Engineer<br>
Architectural Energy Corp., <st1:place w:st="on"><st1:City w:st="on">Boulder</st1:City>
<st1:State w:st="on">CO</st1:State></st1:place></span></font> <o:p></o:p></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'> </span></font><font size=2><span style='font-size:10.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>==================<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>You received this e-mail because you are subscribed <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>to the BLDG-SIM@GARD.COM mailing list. To unsubscribe <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>from this mailing list send a blank message to <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>BLDG-SIM-UNSUBSCRIBE@GARD.COM<o:p></o:p></span></font></pre></div>
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