<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]-->
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Ron, to comment on your statement, “</span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I believe that
the kW/CFM is based on the Baseline BHP and Baseline Fan Power formula in
ASHRAE 90.1-2004 G3.2.1.9. The CFM is the total building CFM”, 90.1-2007
makes it the most clear that the CFM is actually ONLY the Baseline’s peak
SUPPLY CFM. The same is true for 90.1-2004, it’s just not very clear. However
the reviewers do know that this is true and have most recently been asking for
a demonstration of calculation methodology.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Paul</span><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'><o:p> </o:p></span></p>
<div>
<div>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#5F5F5F'>Paul Erickson LEED AP</span></b><b><span style='font-family:
"Arial","sans-serif";color:#1F497D'> </span></b><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";
color:#5F5F5F'>Sustainable</span></b><b><span style='font-size:9.0pt;
color:#5F5F5F'> </span></b><span style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:9.0pt;color:maroon'><a
href="http://www.aeieng.com/" title="http://www.aeieng.com/"><span
style='font-family:"Arial","sans-serif";color:maroon;text-decoration:none'>Affiliated
Engineers, Inc.</span><span style='color:maroon;text-decoration:none'> </span></a></span></b><span
style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'> </span><span
style='font-family:"Arial","sans-serif";color:#1F497D'> </span><span
style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:7.5pt;color:#5F5F5F'>5802 Research
Park Blvd.</span><span style='color:#1F497D'> </span><span style='font-size:
9.0pt;color:maroon'>| </span><span style='font-size:7.5pt;color:#5F5F5F'>Madison,</span><span
style='color:#1F497D'> </span><span style='font-size:7.5pt;color:#5F5F5F'>WI
53719</span><span style='color:#1F497D'> </span><span style='font-size:
9.0pt;color:maroon'>| </span><b><span style='font-size:7.5pt;color:#5F5F5F'>P</span></b><span
style='color:#1F497D'> </span><span style='font-size:7.5pt;color:#5F5F5F'>608.236.1112
</span><span style='font-size:9.0pt;color:maroon'>| </span><b><span
style='font-size:7.5pt;color:#5F5F5F'>F</span></b><span style='font-size:7.5pt;
color:#5F5F5F'> 608.238.2614 </span><span style='color:#1F497D'><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span style='font-size:7.5pt;color:#5F5F5F'><a
href="mailto:perickson@aeieng.com"><span style='font-family:"Arial","sans-serif";
color:#5F5F5F;text-decoration:none'>perickson@aeieng.com</span></a> </span><span
style='font-size:9.0pt;font-family:"Arial","sans-serif";color:maroon'>| </span><span
style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F'>www.aeieng.com</span><span
style='font-family:"Arial","sans-serif";color:#1F497D'> </span><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"'>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>ron
lamarre<br>
<b>Sent:</b> Friday, September 18, 2009 11:49 PM<br>
<b>To:</b> Matthew Higgins<br>
<b>Cc:</b> Equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Appendix G Fan Simulation<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi
to all:<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
believe that the kW/CFM is based on the Baseline BHP and Baseline Fan
Power formula in ASHRAE 90.1-2004 G3.2.1.9. The CFM is the total building
CFM; see the air-side summary report for the total bulding CFM. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To
get the correct total building CFM, set the Baseline supply-air-to-room-air at
a 20-degree F differential. For instance, if your summer (cooling)
set-point temp = 75 degreesF, then the cooling supply air temp from the
unit is 55-degree F. If your winter (heating) set-point temp is 70-degree
F, then your heating supply air temp from the unit is 90-degree F.
Run a simulation and eQUEST will determine the CFM for each system based on
this differential; then balance the systems to be under the 300 unmet
hours limit. Then open the air-side summary report to see the
total CFM of all your systems. Use that total CFM in the BHP and Baseline
Fan Power calculations under G3.2.1.9. To use the formulas, you need to
use a calculator with a "natural log" button and an "e"
button for the energy constant (e=1.28....just like "pie" = 3.14).<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>For
a Baseline Type 3 PSZ System, the fan power should be in the neighborhood of
0.0007; this may be why GBCI questioned your result. Then assign
this fan power to each baseline PSZ system in your building and re-run the
simulation. Include the formula in the LEED submittal template or
narrative to demonstrate how its calculated; as well as including the Air-side
Summary Report. GBCI will see both the total baseline CFM and the
baseline fan power calculations.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
Proposed conditions are the proposed set-points, proposed supply air temps, and
proposed kW/CFM for each system as designed. If the RTU fans run
continuously during occupancy periods, separate the supply air fan power, which
is the kW to use, from the RTU power. This allows design teams to
take credit for using high efficient HVAC systems (low kW/CFM).<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hope
this helps.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<div>
<p class=MsoNormal><strong><span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>Ron
Lamarre, AIA, NCARB</span></strong><span style='font-size:10.0pt;font-family:
"Arial","sans-serif"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>Architect
- <strong><span style='font-family:"Verdana","sans-serif"'>LEED AP</span></strong></span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
<hr size=1 width="100%" align=center>
</span></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><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"'> Matthew Higgins
<higgins@edi-arch.com><br>
<b>To:</b> "Equest-users@lists.onebuilding.org"
<Equest-users@lists.onebuilding.org>; BLDG SIM <bldg-sim@gard.com><br>
<b>Sent:</b> Thursday, September 17, 2009 5:12:10 PM<br>
<b>Subject:</b> [Equest-users] Appendix G Fan Simulation<br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
I've seen multiple posts regarding 2004 Appendix G Fan Power and one post from
Ming Zeng suggested the following:<br>
"Baseline model fan usually gives 0.00078KW/cfm. For proposed fans,
typically it is 0.00016-0.00018 KW/cfm/in static*"*<br>
<br>
I have two problems related to this because my Baseline KW/cfm is closer to
0.001 KW/cfm for a bunch of unitary Type-3 systems, which is indefinitely way
too high.<br>
<br>
FIRST<br>
Many people have referred to the calculated fan power as an allowance, which to
me, would appear to be a threshold not to exceed based on the 20deg-F delta for
Appendix G Fan Sizing. I figure this is not the case because others refer to
the fan power as something that is simulated in the model as a KW/cfm.<br>
I've also seen posts where numbers are expressed as KW/kcfm, which would
indicate fan power KW per thousand cfm; which again is not an applicable figure
for simulation using eQuest.<br>
<br>
SECOND<br>
I'm struggling with these items because a recent GBCI reviewer has asked me to
re-calculate my fan power because my BHPs are a bit higher than they should be.
When I "re-calculate" these values I do not come up with the numbers
they do (BHP ASHRAE - attached).<br>
<br>
I'm trying to reconcile my response and eQuest inputs before we re-submit, but
I'm not sure what to do.<br>
<br>
Much thanks.<br>
<br>
-- Matthew Higgins, LEED AP + ASHRAE-HBDP<br>
Environmental Dynamics, Inc.<br>
Architecture and Sustainability Consulting Services<br>
505.242.2851 x.103<br>
<br>
Any data provided by the Consultant, verbal or written, are to be considered
opinions of building energy and/or daylight performance. The Client understands
that the Consultant has no control of occupant habits, equipment or material
performance or characteristics, site or climate conditions or the Contractor's
method of assembly, and that the Consultant's opinions regarding building
energy/daylight performance are made on the basis of the Consultant's
professional judgment and experience. The Consultant makes no warranty, express
or implied, that the energy/daylight performance of the building will not vary
from the Consultant's opinion of building energy/daylight performance.<o:p></o:p></span></p>
</div>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
</body>
</html>