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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Mustafa,<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'>Short answer: No, you should not use the
same system capacities or flow rates in your proposed and baseline designs.<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 baseline system airflow rates are calculated
using a supply-air-to-room-air temperature difference of 20°F, per ASHRAE 90.1,
Appendix G, <span class=GramE>G3.1.2.8</span>.<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=GramE><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>If the DESIGN-COOL-T of
the zones is 75°F (the default), then the system MIN-SUPPLY-T should be 55°F.</span></font></span><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'>Use a system COOL-SIZING-RATI of 1.15, per
G3.1.2.2.<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'>Make sure you have entered the minimum
outdoor air ventilation rates and kept them identical between baseline and
proposed models.<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'>While I have not tried it before, you may
get higher baseline capacities by using the design day sizing option described
in G3.1.2.2.1 instead of using the weather file.<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'>Usually, the cooling load in your proposed
model will be less than the baseline, since your envelope will (hopefully) be
improved and you will (hopefully) have a better lighting 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'>If you still show higher fan energy in the
proposed model, and you are doing LEED v3, see if you can take advantage of any
of the pressure drop adjustments listed in Table 6.5.3.1.1B.<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'>Regards,<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'>Bill<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>
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normal;mso-no-proof:yes'>William</span></font></b></st1:City><b
style='mso-bidi-font-weight:normal'><font size=2 color=black
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:black;font-weight:bold;mso-bidi-font-weight:
normal;mso-no-proof:yes'> <st1:State w:st="on">Bishop</st1:State>, <st1:State
w:st="on">PE</st1:State></span></font></b></st1:place><b style='mso-bidi-font-weight:
normal'><font size=2 color=black face="Franklin Gothic Medium Cond"><span
style='font-size:10.0pt;font-family:"Franklin Gothic Medium Cond";color:black;
font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'>, BEMP, LEED<sup>®</sup>
AP </span></font></b><b style='mso-bidi-font-weight:normal'><font size=2
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color:black;font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'>Pathfinder
Engineers & Architects LLP</span></font></b><b><font size=2 color=black
face="Franklin Gothic Medium Cond"><span style='font-size:10.0pt;font-family:
"Franklin Gothic Medium Cond";color:black;font-weight:bold;mso-no-proof:yes'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
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<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
5.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:address
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face=Arial><span style='font-size:9.0pt;font-family:Arial;color:navy;
mso-no-proof:yes'>134 South Fitzhugh Street</span></font></st1:Street><font
size=1 color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><st1:City w:st="on"><font size=1 color=navy face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:navy;mso-no-proof:yes'>Rochester</span></font></st1:City><font
size=1 color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:navy;mso-no-proof:yes'>, <st1:State w:st="on">NY</st1:State> <st1:PostalCode
w:st="on">14608</st1:PostalCode></span></font></st1:address><font size=1
color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>T: (585) 325-6004 </span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:black;mso-no-proof:yes'>Ext. 114</span></font><font size=1 color=navy><span
style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>F: (585) 325-6005</span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;mso-bidi-font-size:
12.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>wbishop@pathfinder-ea.com<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;mso-bidi-font-size:11.0pt;font-family:Arial;color:black;mso-no-proof:
yes'>www.pathfinder-ea.com</span></font><font size=3 color=navy
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman";
color:navy;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=5 color=green face=Webdings><span
style='font-size:18.0pt;font-family:Webdings;mso-bidi-font-family:Webdings;
color:green;mso-no-proof:yes'>P</span></font><font color=green><span
style='color:green;mso-no-proof:yes'> </span></font><font size=1 color=green><span
style='font-size:7.5pt;color:green;mso-no-proof:yes'>Sustainability –
less is more.</span></font><font color=green><span style='color:green'><o:p></o:p></span></font></p>
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<p class=MsoNormal><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'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Mustafa Herzalla<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, July 20, 2010 3:47
AM<br>
<b><span style='font-weight:bold'>To:</span></b> Equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] CFM/ton
conflict issue for LEED projects</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'>Dear eQuest users,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'>I calculate cooling load and design air flow using
eQuest software then apply the same design using HAP 4.3, the cooling
load for the two designs in tonnage were the same, while the design air flow in
CFM was in eQuest <b><i><u><font color=red><span style='color:red;font-weight:
bold;font-style:italic'>less</span></font></u></i></b><i><font color=red><span
style='color:red;font-style:italic'> </span></font></i>than the design air flow
in HAP.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'>For LEED projects, the proposed design should be model
as the design documents, and many designers use HAP or other design software
which is different than eQuest. and for LEED simulation we use eQuest , in this
case the CFM/ton in the baseline design is less than the CFM/ton in the proposed
design. The problem here that this case will reduce the energy savings in fans
for the proposed design. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'>My question is: is it ok to make the CFM/ton for the
baseline design as in the proposed design? If NO, is there a solution to
increase the design airflow for the baseline?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'>Best,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'>Mustafa Herzallah<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Eurostile><span style='font-size:12.0pt;
font-family:Eurostile'><o:p> </o:p></span></font></p>
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