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<p class=MsoNormal><span style='font-size:12.0pt;color:blue'>Brian,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'>I believe the
wrong .inp file was sent the first time. This one should work. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'>The 3% change is in
the total kWh of the building. There is an approximately 10% change in the kWh
for space cooling only. However, the heating is all in therms since the system
uses hot water reheat provide by a natural gas boiler throughout. This actually
increases with the improved windows, which makes sense since during the heating
periods there will not be as much solar gain from the windows. But, it increases
enough to the point where it outweighs the gains in cooling to where the total
cost for the year actually goes up by about $1000.00 overall.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'>The building is
located in Columbia, SC so I would think the systems would be in cooling most
of the time and I would see a savings over the course of a year.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'>Brett West</span><span
style='font-size:12.0pt;color:blue'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Times New Roman","serif";
color:blue'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'>RMF Engineering,
Inc</span><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:blue'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:blue'>Ph: 843.971.9639<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:blue'>bwest@rmf.com</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:blue'> <o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:12.0pt;color:blue'><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"'> Wolfe, Brian
[mailto:bwolfe@hksinc.com] <br>
<b>Sent:</b> Monday, November 08, 2010 5:03 PM<br>
<b>To:</b> Brett M. West; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] Window Comparison<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>I couldn’t get it to open
to check, but since there’s a total of 3% change, you might check the
difference between space cooling and heating. The difference might be
counteracting each other enough to reduce the benefits that you thought
you’d see. The location and internal loads might have some affect
as well.<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-size:10.0pt;font-family:"Century Gothic","sans-serif";
color:#1F497D'>BRIAN J. WOLFE, CDT, LEED AP BD+ C<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Century Gothic","sans-serif";
color:#1F497D'>SUSTAINABLE DESIGN COORDINATOR<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial Black","sans-serif";
color:red'>HKS, INC.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";
color:#1F497D'>1919 McKINNEY AVENUE<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";
color:#1F497D'>DALLAS, TX 75201<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";
color:#1F497D'>214.969.5599 ext.3669<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";
color:#1F497D'>bwolfe@hksinc.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Century Gothic","sans-serif";
color:#1F497D'>www.hksinc.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Century Gothic","sans-serif";
color:gray'>If you are sending file(s) always use my </span><span
style='font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:gray'><a
href="https://hks.thruinc.net/drop_box.asp?toemail=bwolfe@hksinc.com"><b><span
style='color:#333333;text-decoration:none'>Thru DROPBOX</span></b></a></span><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"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Brett
M. West<br>
<b>Sent:</b> Monday, November 08, 2010 3:38 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Window Comparison<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:12.0pt'>I am doing a model for a two
story office building with the windows making up approximately 30% of the
building’s exterior. My goal is to find what type of energy savings the
owner can expect by replacing all the existing single pane windows with double
pane, low e windows. When I change the window type to a double pane low-e
window I am seeing savings that are very small, around 3% of the total building
kWh.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>For reference, the buildings
HVAC system consists of two air handlers (one per floor) ducted to a VAV system
with hot water reheat. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>Has anyone else tried to do
this type of comparison and if so what type of energy savings did you find? I
have attached my model pd2 and inp files for reference. Thanks in advance for
any information.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>Brett West<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'>RMF Engineering, Inc</span><b><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Ph:
843.971.9639<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>bwest@rmf.com
<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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