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There would be a difference, for instance, if there were ten
windows, all with metal frames, and you modeled that as one big
window with ten times the area. I wouldn't do that. Maybe not
important, but I wouldn't do it.<br>
<br>
The soffit only comes into the question of there is an overhang,
which is shading, and must be modeled if you want to take credit for
it.<br>
<br>
I think.<br>
<br>
<br>
<br>
<pre class="moz-signature" cols="72">Robert Wichert P.Eng. LEED AP
+1 916 966 9060
FAX +1 916 966 9068
===============================================
</pre>
<br>
On 2/29/2012 10:02 AM, Morgan Heater wrote:
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<div class="Section1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You
can model whatever size and shape you want as long as your
area weighted SHGC, and U-value are correct, and your
shading is modeling
correctly. Daylighting performance might be affected
slightly, along with
passive solar performance, but I am fairly certain that the
affect would be
very small compared with the annual building energy use. If
you’re genuinely curious,
try it. Model a couple of different scenarios, all with the
same total area,
u-value, and SHGC, and see what happens. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Morgan
Heater, P.E.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">BEMP,
LEED AP<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a class="moz-txt-link-abbreviated" href="mailto:morgan@ecotope.com">morgan@ecotope.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">206-322-3753
ext 209<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";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";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext">
<a class="moz-txt-link-abbreviated" href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto:bldg-sim-bounces@lists.onebuilding.org</a>] <b>On
Behalf Of </b>JRR<br>
<b>Sent:</b> Tuesday, February 28, 2012 6:24 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] Do I need to use the
actual window shape?<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">YES<span style="font-family:"Times New
Roman","serif""> </span>
SEE<span style="font-family:"Times New
Roman","serif""> </span> Passive
Solar Handbook Extended Professional Edition,<span
style="font-family:"Times New
Roman","serif""> </span>
Mazria,<span style="font-family:"Times New
Roman","serif""> </span>
1979.<span style="font-family:"Times New
Roman","serif""> </span> try<span
style="font-family:"Times New
Roman","serif""> </span> Amazon.com<br>
<br>
IT"S the header space at the top of the window, the width of
the soffit,<span style="font-family:"Times New
Roman","serif""> </span> that turns off the
summer heat................<br>
<br>
bye.......<br>
<br>
<br>
On 2/24/2012 12:10 PM, Alex Krickx wrote: <o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Esmireta,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’m
not sure about what LEED requires, but I would be aware that
in addition to Window-Wall Ratio, you should also consider
Glass-Frame ratio.
Depending on the software and method that you model windows,
two 3’x5’ windows
with a 1” frame are NOT the same as one 6’x5’ window (the
6’x5’ would have two
vertical components, whereas the two 3’x5’ would have four
vertical
components). I’m not sure a LEED reviewer would notice the
difference, but I
think best practice is to include the correct frame area in
your model.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Kind
regards,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Alex
Krickx</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-family:"Calibri","sans-serif";color:#262F13">Alex
Krickx,
LEED AP</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:gray">Building
Energy Specialist</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif"">Serious
Energy,
Inc.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif"">1250
Elko
Dr, Sunnyvale, CA 94089</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif"">(t)
408.541.8124</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif""><a
moz-do-not-send="true"
href="mailto:akrickx@seriousenergy.com">akrickx@seriousenergy.com</a></span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><i><span
style="font-size:8.0pt;font-family:"Calibri","sans-serif"">The
information
contained in this e-mail and any attachments may be
confidential,
proprietary and/or privileged. If you are not the intended
recipient then you
have received it in error and any review, distribution or
copying of this message
and any attachments is prohibited and you are to notify
the sender immediately
by reply e-mail and delete immediately this message and
any attachments.</span></i><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<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"">
<a moz-do-not-send="true"
href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>
[<a moz-do-not-send="true"
href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto:bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Esmireta<br>
<b>Sent:</b> Thursday, February 23, 2012 5:45 PM<br>
<b>To:</b> BLDGSIM<br>
<b>Subject:</b> [Bldg-sim] Do I need to use the actual
window shape?</span><o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""> </span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Arial","sans-serif"">When
doing
the LEED project, do I need to use the actual window
shape, or just keep
the window-wall ratio in each direction?</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Arial","sans-serif"">I
don't think the window shape will influence the energy
cost if the window-wall
ratio is the same. But I don't know if the LEED reviewer
care about it.</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Arial","sans-serif"">Thanks
a
lot!</span><o:p></o:p></p>
</div>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-family:"Times New
Roman","serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman","serif""><br>
<br>
<br>
<o:p></o:p></span></p>
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