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<p class=MsoNormal><span style='color:#1F497D'>Dear All,<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 am proposing the following
methodology:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo3'><![if !supportLists]><span
style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='color:#1F497D'>Prepare a model
based on the current envelope and systems and then to <u>compare them with utility
bills for past 12 / 24 months</u> and establish <b>AS IS case</b> <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo3'><![if !supportLists]><span
style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='color:#1F497D'>The <b>AS IS case</b>
values can be compared with <b>Appendix G</b> values to establish their status
(either %better or %worse than <b>ASHARE base case</b>) and prepare an baseline.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo3'><![if !supportLists]><span
style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='color:#1F497D'>The proposed Energy Conservation
Measures (ECMs) can be applied to the <b>AS IS case </b>to calculate % savings<o:p></o:p></span></p>
<p class=MsoListParagraph><span style='color:#1F497D'><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'>Shirish M. Deshpande<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>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Jeremy
Poling<br>
<b>Sent:</b> 04 June 2009 19:30<br>
<b>To:</b> Nathan Miller; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Appendix G Interpretation: Existing Building
Envelope<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Nathan,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Your conclusion is the same one I have reached in the past in this
situation – the existing building clause is the overriding factor.
For existing buildings I interpret that the intent is comparing the
proposed model to what would occur if you did not change anything about the
existing building. It does contradict some of the other provisions of
Appendix G, but many of those provisions seem designed to develop that
arbitrary baseline of what would be considered “minimally
compliant” for comparison when a rating authority uses Appendix G.
It gets even fuzzier when you have an addition and renovation together since
then you have an existing building baseline for the renovated part of the
building and an Appendix G baseline for the addition.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><strong><span lang=EN-US style='font-size:10.0pt;font-family:
"Arial","sans-serif";color:navy'>Jeremy R. Poling, LEED AP</span></strong><span
lang=EN-US style='font-size:9.0pt;font-family:"Arial","sans-serif";color:navy'><br>
</span><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Senior Sustainability Analyst<br>
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<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Nathan
Miller<br>
<b>Sent:</b> Wednesday, June 03, 2009 7:00 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Appendix G Interpretation: Existing Building
Envelope</span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I’ve run into one of those grey areas
of the Appendix G language on a project. We are looking at a major renovation
project where the shell of the building will be upgraded. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Clearly the baseline building will be
modeled with insulation U-values that correspond to the existing conditions of
the building rather than the insulation levels prescribed by tables 5.5-1 to
5.5-8. I think this is pretty well established.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><br>
My question is about the quantity of glazing in each case. For this project we
will be punching new glazing into the existing façade as part of the
renovations. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoListParagraph style='margin-bottom:12.0pt;text-indent:-18.0pt;
mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US
style='font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-US>Table G3.1, Section 5 states that
“Vertical fenestration areas for new buildings <i>and alterations</i>
shall equal that in the proposed design or 40% of gross above-grade wall area,
whichever is smaller.” So if we add new windows, it would seem that the
baseline building should also have those windows, but what should their U-value
be? Same U-value as the other existing windows? Lookup the value for new
glazing?<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span
lang=EN-US style='font-family:Symbol'><span style='mso-list:Ignore'>·<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-US>Lower in that same section of
Table G3.1 it states: “Existing Buildings. For existing building
envelopes, the baseline building design shall reflect existing conditions prior
to any revisions that are part of the scope of work being evaluated.” To
me, this seems to say that you would go with the existing quantity of glazing,
and the proposed model would have more glazing than the baseline, even if the
proposed does not exceed the 40% cap.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>There seems to be a little contradiction
between the two requirements. My inclination is that the existing building
clause overrides the requirement that the same amount of glazing be used in
each model. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Have any of you worked on a project where
this came up? Any thoughts? It seems like this could potentially be one of
those hot topics of discussion. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Franklin Gothic Demi","sans-serif"'>Nathan
Miller</span><span lang=EN-US style='font-family:"Franklin Gothic Demi","sans-serif"'>,
PE, LEED</span><span lang=EN-US style='font-size:8.0pt;font-family:"Franklin Gothic Demi","sans-serif";
position:relative;top:-2.0pt;mso-text-raise:2.0pt'>®</span><span lang=EN-US
style='font-family:"Franklin Gothic Demi","sans-serif"'> AP<o:p></o:p></span></p>
<p class=MsoNormal><i><span lang=EN-US style='font-size:10.0pt;font-family:
"Times New Roman","serif"'>Senior Energy Engineer/Mechanical Engineer<o:p></o:p></span></i></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Times New Roman","serif"'>direct:
206.788.4577<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Times New Roman","serif"'>fax:
206.285.7111 <o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:3.0pt'><span lang=EN-US
style='font-size:8.0pt;font-family:"Arial","sans-serif"'><a
href="http://www.rushingco.com/">www.rushingco.com</a><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><img
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