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<p class=MsoNormal><span style='color:#1F497D'>I think I can help with the
Excel formula…<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'>The VLOOKUP function uses 2
columns of data: the first is where the function is looking to match numbers (or
find “closest to”) and the second is the value to return that
corresponds with the first.<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'>Make your first column have the min
and max values in a range for a single efficiency. Say you’re
increasing from A to B to C for every interval of 5:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>0 A<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>4 A<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>5 B<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>9 B<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>10 C<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>14 C<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'>And so forth.. and make
sure your VLOOKUP is set to “closest to” instead of “exact
match.” Does that get the job done?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Greg Collins</span></b><span style='font-size:12.0pt;font-family:
"Times New Roman","serif";color:#1F497D'><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Design Engineer / Energy Analyst<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Mechanical Department</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:#1F497D'><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>LEED® Accredited Professional</span><span style='font-size:
12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><br>
<br>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:red'>NOTE OUR NEW ADDRESS</span><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:red'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>18200 Von Karman Ave., Suite 100</span><span style='font-size:
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"Times New Roman","serif";color:#1F497D'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>T. 949.833.8190 F. 949.833.0252<br>
<br>
</span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#333333'>Thinking. Inside the building.</span></b><span style='font-size:
9.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#333333'><a href="http://www.glumac.com/">www.glumac.com</a></span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'> </span><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'><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>
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<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"'> Bishop, Bill
[mailto:wbishop@pathfinder-ea.com] <br>
<b>Sent:</b> Tuesday, April 06, 2010 2:10 PM<br>
<b>To:</b> Tomlinson, Scott; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Calculating Baseline Fan Power<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Scott,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>The note for Table G3.1.2.9 states to use the design flow rate of
the <i>baseline</i> building system to calculate A. There is still the issue of
whether or not to apply the adjustment from Table 6.5.3.1.1B when the baseline
system serves a different area than the proposed system. I’m still trying
to decide that as well. I can think of at least two alternatives:<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><span
style='mso-list:Ignore'>1.)<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Apply the pressure drop adjustment to any baseline system that
conditions at least half of the area of a proposed system that qualifies for
the adjustment,<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><span
style='mso-list:Ignore'>2.)<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Apply the pressure drop adjustment in a weighted manner based on
the proportional area conditioned by the baseline system relative to the
proposed system.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>I think option 1.) would be quicker but option 2.) more closely
reflects the intent of the pressure drop adjustment.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>On a related note, if anybody has figured out a way to use a
VLOOKUP function or equivalent in Excel for looking up motor efficiency in a
baseline P<sub>fan</sub> calculation, let me know. (The function returns the
efficiency of the next smallest motor in the table when there is no exact
match, but G3.1.2.9 requires the efficiency of the next largest motor to be
used.)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Bill<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'>William Bishop, EIT, BEMP, LEED<sup>®</sup> AP </span></b><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:#006600'>|</span></b><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'> </span></b><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'>Pathfinder Engineers & Architects LLP</span></b><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond","sans-serif";
color:black'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>Mechanical Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:5.0pt;font-family:"Arial","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>134 South Fitzhugh Street</span><span style='font-size:9.0pt;
color:navy'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>Rochester, NY 14608</span><span style='font-size:9.0pt;color:navy'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>T: (585) 325-6004 </span><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:black'>Ext. 114</span><span style='font-size:9.0pt;
color:navy'><br>
</span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:navy'>F: (585) 325-6005</span><span style='font-size:9.0pt;font-family:
"Arial","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>wbishop@pathfinder-ea.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:black'>www.pathfinder-ea.com</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:navy'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:18.0pt;font-family:Webdings;
color:green'>P</span><span style='color:green'> </span><span style='font-size:
7.5pt;color:green'>Please strive to live sustainably.</span><span
style='color:green'><o:p></o:p></span></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>
<hr size=2 width="100%" align=center>
</span></div>
<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>Tomlinson, Scott<br>
<b>Sent:</b> Tuesday, April 06, 2010 4:29 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Calculating Baseline Fan Power</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>eQuesters,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Sorry in advance for a confusing question, but determining
baseline system fan power is terribly confusing to me. I am currently
using ASHRAE 90.1 – 2007.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>According to section G3.1.2.9 I need to calculate fan
power=(bhp*746)/(fan motor efficiency) for a system 7.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>According to Table G3.1.2.9 I need to calculate
bhp=CFM(s)*.0013+A for a system 7.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>According to Table 6.5.3.1.1A I need to calculate
A=Summation of [PD*CFM(d)/4131] where:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>PD= each applicable pressure drop adjustment from table
6.5.3.1.1B in wc and<o:p></o:p></p>
<p class=MsoNormal>CFM(d)= the design airflow of each applicable device from
table 6.5.3.1.1B<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So basically I take the airflow rates from my <u>design
building</u> systems and the pressure drops from my components in my <u>design
building</u> systems to figure out what my baseline building break horsepower
will be. What if I have systems serving multiple floors in my design
building? Since 90.1 requires me to have a system per floor in my
baseline building how would I handle this? What if I have systems with
different components serving different portions of my design building?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I guess a simpler question would be how are people
determining baseline fan power?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thank you,<o:p></o:p></p>
<table class=MsoNormalTable border=0 cellpadding=0>
<tr>
<td colspan=3 style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:silver'>__________________________________________<o:p></o:p></span></p>
</td>
</tr>
<tr>
<td colspan=3 style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>Scott Tomlinson, PE, LEED-AP</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'><o:p></o:p></span></p>
</td>
</tr>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>Mechanical<o:p></o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:#004040'>Symmes Maini & McKee Associates, Inc.</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#004040'><o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>1000 Massachusetts Avenue, Cambridge, MA 02138<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>t: 617.520.9438<o:p></o:p></span></p>
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<td width=100 nowrap rowspan=4 style='width:75.0pt;padding:0in 0in 0in 0in'>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><img
border=0 width=63 height=64 id="Picture_x005f_x0020_1"
src="cid:image001.jpg@01CAD5AB.F07EDBD0"
alt="http://intranet/Images/USGBC.jpg"><o:p></o:p></span></p>
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<td width=200 nowrap rowspan=4 style='width:150.0pt;padding:0in 0in 0in 0in'>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>f: 617.354.5758<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'><a href="mailto:STomlinson@smma.com">stomlinson@smma.com</a><o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'><a href="http://www.smma.com/">www.smma.com</a><o:p></o:p></span></p>
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