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<DIV><FONT face=Arial size=2>Indoor set-point for Jamaica [18 deg. N] is 24.4
deg. C.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Paul Hay<BR>Managing Partner</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>PAUL HAY Consultants<BR>15a Cassia Park
Road<BR>Kingston 10<BR>Jamaica, W.I.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Strategic Facility Planning & Design Office
Automation</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>tel: +1 (876)
923-8882/or<BR> +1 (876) 923-9433<BR>fax: +1
(876)923-3038</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>website: <A
href="http://www.phcjamaica.com">www.phcjamaica.com</A><BR>e-mail: <A
href="mailto:phay@phcjamaica.com">phay@phcjamaica.com</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV style="FONT: 10pt arial">----- Original Message -----
<DIV style="BACKGROUND: #e4e4e4; font-color: black"><B>From:</B> <A
title=dkoffs@gmail.com href="mailto:dkoffs@gmail.com">Kofoworola</A> </DIV>
<DIV><B>To:</B> <A title=BLDG-SIM@gard.com
href="mailto:BLDG-SIM@gard.com">BLDG-SIM@gard.com</A> </DIV>
<DIV><B>Cc:</B> <A title=BLDG-SIM@gard.com
href="mailto:BLDG-SIM@gard.com">BLDG-SIM@gard.com</A> </DIV>
<DIV><B>Sent:</B> Friday, March 30, 2007 11:31 PM</DIV>
<DIV><B>Subject:</B> [BLDG-SIM] Natural Ventilation in LEED</DIV></DIV>
<DIV><BR></DIV>Hi All,<BR><BR>Can anyone give me some information /references on
the recommended building air conditioning indoor set point temperature for
office buildings in Tropical countries (example Thailand)?<BR><BR>Many
thanks<BR><BR>
<DIV><SPAN class=gmail_quote>On 3/30/07, <B class=gmail_sendername>Peter
Alspach</B> <<A
href="mailto:peter.alspach@arup.com">peter.alspach@arup.com</A>>
wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV lang=EN-US link="blue" vlink="purple">
<DIV><SPAN><FONT face=Arial color=#0000ff size=2>Marcus,</FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2>I think that this approach to
documenting natural ventilation within the bounds of Appendix G is the correct
one. </FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2>However, there are a couple
things I'd like to note for future consideration:</FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2>1. If the proposed building
can stay within the unmet load hours limits without a fictitious mechanical
cooling system, that should be acceptable, provided that budget and proposed
models have identical thermostat setpoints, etc. </FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2>2. As the USGBC considers
project carbon savings and benchmarking of buildings versus target finder, I
would encourage a broader view on natural ventilation and other strategies and
the modeling process. In my opinion, for this type of comparison the building
should be modeled exactly as it is to be built and operated - i.e. don't
include fictitious mechanical systems that are not installed or other such
deviations from the as-built condition. We already run this type of model
for owners so they can see what they are really going to expect for energy
savings and indoor conditions and I suspect that others do the
same.</FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2>Thanks for the good
news.</FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial color=#0000ff size=2>
<DIV align=left>
<DIV align=left>
<DIV align=left><FONT face=Arial size=2>Peter Alspach, P.E.</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Associate</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Arup</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>403 Columbia St., Suite
220</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Seattle, WA 98104</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>T: <SPAN
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<DIV align=left><FONT face=Arial
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<DIV align=left><FONT face=Arial size=2><SPAN><SPAN>F: <SPAN
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<DIV align=left><FONT face=Arial size=2>E: <A
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:peter.alspach@arup.com"
target=_blank>peter.alspach@arup.com</A></FONT></DIV></DIV></DIV></FONT></SPAN></DIV><BR>
<DIV lang=en-us dir=ltr align=left>
<HR>
<FONT face=Tahoma size=2><B>From:</B> <A
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:BLDG-SIM@gard.com" target=_blank>BLDG-SIM@gard.com</A> [mailto:<A
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:BLDG-SIM@gard.com" target=_blank>BLDG-SIM@gard.com</A>] <B>On
Behalf Of </B>Marcus Sheffer<BR><B>Sent:</B> Friday, March 30, 2007 6:45
AM<BR><B>To:</B> <A onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:BLDG-SIM@gard.com"
target=_blank>BLDG-SIM@gard.com</A><BR><B>Subject:</B> [BLDG-SIM] Natural
Ventilation in LEED[Filed 30 Mar 2007 09:36]<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">FYI a new CIR has
been posted on the USGBC web site regarding natural ventilation systems and
LEED projects.<SPAN> </SPAN>The text is below.<SPAN> </SPAN>Please
consider this just a starting point and general guidance for projects that are
similar to the one described.<SPAN> </SPAN>We welcome
feedback.</SPAN></FONT></P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<TABLE style="WIDTH: 100%" cellSpacing=0 cellPadding=0 width="100%"
border=0><TBODY>
<TR>
<TD
style="PADDING-RIGHT: 0in; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; WIDTH: 15%; PADDING-TOP: 0in"
vAlign=top width="15%">
<P style="LINE-HEIGHT: 7.65pt"><B><FONT face="Trebuchet MS"
color=#474440 size=1><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)">3/22/2007</SPAN> - </FONT></B><FONT
face="Trebuchet MS" color=#474440 size=1> <SPAN
style="FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)"></SPAN></FONT></P></TD>
<TD
style="PADDING-RIGHT: 0in; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in"
vAlign=top>
<P style="LINE-HEIGHT: 7.65pt"><B><FONT face="Trebuchet MS"
color=#474440 size=1><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)">Credit
Interpretation Request</SPAN></FONT></B><FONT face="Trebuchet MS"
color=#474440 size=1><SPAN
style="FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)"><BR><SPAN>Our project
consists of two small buildings close to the ocean that will achieve
substantial energy savings by incorporating a natural ventilation
strategy. No mechanical heating or cooling is intended for either
building, with the exception of a small electrical/server room.
<BR><BR>The building is designed with a very narrow and long floor plate
situated perpendicular to prevailing winds in the area. Ventilation
openings are consistent with the requirements of ASHRAE 62.1-2004
Section 6.8. The project also meets the requirements outlined in the
CIBSE Applications Manual 10: 2005 as referenced in EQc2 for Natural
ventilation in non-domestic buildings. Per Title-24 2005 requirements
for natural ventilation, the sum of operable windows will be greater
than 5% of the floor area of each space that is naturally ventilated.
The openings will also be readily accessible to the occupants of each
space at all times. Outdoor airflow through the openings in regularly
occupied spaces will come directly from the outdoors, not through
intermediate spaces such as other occupied spaces or corridors. Openings
include operable windows, through-the roof ventilators, and vents
between interior spaces. Control mechanisms for the natural ventilation
openings are manual. A long, tall hallway situated perpendicular to the
prevailing winds will collect heated air and exhaust it the outside. The
roof over much of the space is sloped allowing air to enter on the low
side and exit on the high side. In all cases, the building is designed
to facilitate cross-ventilation with windows low on the walls for
drawing the air in, and windows and vents high in opposite walls or on
the roof to draw air out. Under ASHRAE 55 definitions, the building
spaces are defined as "naturally conditioned spaces, occupant
controlled" where the thermal conditions of the spaces are regulated
primarily by the opening and closing of windows or vents by the
occupants. Since the building will have a limited number of occupants
most of the time, manual control of the windows and vents has been
determined the most appropriate strategy for the building to allow
control over individual thermal comfort. As indicated by ASHRAE 55-2004,
section 5.3, the occupants of the space will be engaged in near
sedentary activities with metabolic rates ranging from 1.0 met to 1.3
met. The mean monthly outdoor temperature for the project is greater
than 50 deg. <SPAN>F,</SPAN> and less than 92.3 deg. F all months of the
year, as required under ASHRAE 55-2004, section 5.3 for naturally
ventilated buildings. <BR><BR>The User's Manual for ASHRAE 90.1-2004
Appendix G states on page G-21: The proposed building default cooling
system does not exclude natural ventilation from consideration. It just
means that the proposed building is modeled as a hybrid system where
cooling is provided by natural ventilation when conditions are
acceptable and by the default mechanical cooling system when natural
ventilation is inadequate to provide thermal comfort. We are requesting
confirmation that the following modeling strategy conforms to the
requirements of ASHRAE 90.1-2004 Appendix G modeling protocol:<BR><BR>1.
EnergyPlus will be used to model the building since the EnergyPlus
software has the capability to evaluate energy and comfort parameters
tied to natural ventilation.<BR><BR>2. The Exceptional Calculation
Methodology will be applied to calculate the natural ventilation
savings.<BR><BR>3. The Proposed Design model will be developed to
reflect the design parameters for the envelope and lighting. Operable
windows will be modeled as fixed, and vents will not be included in the
model. Mechanical systems will be modeled identically to the default
heating, cooling and fan systems in the Baseline case, except that fans
in the proposed case will be modeled as cycling on and off to meet
heating and cooling loads during all hours in the proposed case, and
will operate continuously during occupied hours in the Baseline Case
(per the exception shown in Table G3.1.4).<BR><BR>4. Using the
Exceptional Calculation Methodology, The Proposed Design case will be
modified to include natural ventilation for all hours when the cooling
and heating loads can be met. Operable windows and vents will be modeled
as designed. Cooling and heating setpoint temperatures will be identical
to those in the Baseline Case. Schedules will be adjusted to switch on
mechanical cooling during hours when natural ventilation alone cannot
meet the space temperature setpoints. The final model will meet the
ASHRAE G3.1.2.2 requirements stipulating that the Proposed Design cannot
exceed the Baseline Design unmet load hours by more than 50, and that
unmet load hours for the Proposed Design and Baseline Design cannot
exceed 300. <BR><BR>5. (Plan B) If the hybrid system cannot be
manipulated to meet the unmet load hour requirements within the energy
model, hourly output data from a natural ventilation model (having no
mechanical cooling) and the Proposed Design model will be combined in a
spreadsheet. Each hour where cooling and heating setpoints are met in
the natural ventilation model, the hourly results for that model will be
used. For all other hours, the hourly results from the Proposed Design
Model will be used.<BR><BR>6. An Exceptional Calculation Methodology
narrative provided with the EAc1 submittal will document any schedule
adjustments and assumptions that were made to develop the hybrid system.
The savings will also be included as a separate line item on the EAc1
submittal.<BR><BR>Is our proposed energy modeling strategy for natural
ventilation acceptable?</SPAN></SPAN></FONT></P></TD></TR>
<TR>
<TD
style="PADDING-RIGHT: 0in; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in">
<P style="LINE-HEIGHT: 7.65pt"><FONT face="Trebuchet MS" color=#474440
size=1><SPAN
style="FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)"></SPAN></FONT> </P></TD>
<TD
style="PADDING-RIGHT: 0in; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in">
<P><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt"></SPAN></FONT> </P></TD></TR>
<TR>
<TD
style="PADDING-RIGHT: 0in; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; WIDTH: 15%; PADDING-TOP: 0in"
vAlign=top width="15%">
<P style="LINE-HEIGHT: 7.65pt"><B><SPAN><FONT face="Trebuchet MS"
color=#474440 size=1><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)">3/22/2007</SPAN> - </FONT></SPAN></B><FONT
face="Trebuchet MS" color=#474440 size=1> <SPAN
style="FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)"></SPAN></FONT></P></TD>
<TD
style="PADDING-RIGHT: 0in; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in"
vAlign=top>
<P style="LINE-HEIGHT: 7.65pt"><B><FONT face="Trebuchet MS"
color=#474440 size=1><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)">Ruling</SPAN></FONT></B><FONT
face="Trebuchet MS" color=#474440 size=1> <SPAN
style="FONT-SIZE: 5.5pt; COLOR: rgb(71,68,64)"><BR><SPAN>The project is
requesting approval for the method of modeling natural ventilation as an
energy efficiency measure and for taking credit under EA credit 1.
<BR><BR>Submittals for natural ventilation savings will be evaluated on
a case by case basis. <BR><BR>The tools and analysis protocol proposed
is acceptable for modeling ventilation savings in this instance. Other
analysis tools may also be appropriate.<BR><BR>To be able to adequately
document the process and the results, please be sure to provide in the
LEED submittal the following: <BR><BR>· A detailed project description
<BR>· Clear identification of the areas that are taking credit for
natural ventilation<BR>· A detailed description or references that
document the modeling algorithms and/or methodology for the natural
ventilation portion of the energy model<BR>· All thermostat, fan,
infiltration and other appropriate schedules for naturally ventilated
areas<BR><BR>Also, the submitted evaluation must demonstrate that the
range of unmet load hours is similar for both the proposed and baseline
building, to ensure that savings are not claimed for hours outside of
the control parameters. In this case, the project has proposed to meet
these peak loads with a hypothetical cooling system in the proposed
building.<BR><BR>The project will also need to clearly demonstrate that
the operational schedule for the natural ventilation system as modeled
aligns with anticipated occupant behavior in terms of scheduled
occupancy vs. modeled operation. For example, the model cannot assume
that natural ventilation will occur when no one is in the building to
operate the system.<BR><BR>Because manual control is not addressed by
the Appendix G modeling methodology, the manual control features of this
project must be submitted under the exceptional calculation methodology
for case by case review. The project must be prepared to demonstrate
convincingly that a manual control strategy is appropriate and workable
for this project.<BR><BR>Please also be sure to take credit for this
measure as a separate item on the LEED-NC v2.2 Submittal
Template.<BR><BR></SPAN></SPAN></FONT></P></TD></TR></TBODY></TABLE>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<DIV>
<P><FONT face=Arial color=green size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: Arial">Marcus Sheffer –
Vice Chair USGBC EA TAG</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"></SPAN></FONT></P>
<P><FONT face=Arial color=green size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: Arial">Energy
Opportunities, Inc/a 7group Company</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"></SPAN></FONT></P>
<P><FONT face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 7.5pt; COLOR: navy; FONT-FAMILY: Arial">1200 E Camping Area
Road, Wellsville, PA 17365</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"></SPAN></FONT></P>
<P><FONT face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 7.5pt; COLOR: navy; FONT-FAMILY: Arial"><SPAN
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onmouseout="SetCallButton(this, 0,0);HideSkypeMenu();"><SPAN
class=skype_tb_injection_left id=__skype_highlight_id_left
onmouseover="SetCallButtonPart(this, 1);" title="Change country code ..."
onclick="javascript:if(1){doRunCMD(event, 'chdial','2');}else{doRunCMD(event, 'call','+17172922636');}event.preventBubble();return false;"
onmouseout="SetCallButtonPart(this, 0);"><SPAN
class=skype_tb_injection_left_img id=__skype_highlight_id_left_adge
style="BACKGROUND-IMAGE: url(chrome://skype_ff_toolbar_win/content/cb_normal_l.gif)"><IMG
class=skype_tb_img_adge style="WIDTH: 7px; HEIGHT: 11px" height=11
src="chrome://skype_ff_toolbar_win/content/cb_transparent_l.gif"> </SPAN><SPAN
class=skype_tb_injection_left_img id=__skype_highlight_id_left_img><IMG
class=skype_tb_img_flag title="" style="WIDTH: 16px"
src="chrome://skype_ff_toolbar_win/content/famfamfam/us.gif"
name=skype_tb_img_f2> <IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1><IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1> <IMG class=skype_tb_img_arrow title=""
src="chrome://skype_ff_toolbar_win/content/arrow.gif"
name=skype_tb_img_a2><IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1> <IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1></SPAN></SPAN><IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1> <SPAN class=skype_tb_injection_right
id=__skype_highlight_id_right onmouseover="SetCallButtonPart(this, 1)"
title="Call this phone number in United States of America with Skype: +17172922636"
onclick="javascript:doRunCMD(event, 'call','+17172922636');event.preventBubble();return false;"
onmouseout="SetCallButtonPart(this, 0)"><SPAN class=skype_tb_innerText
id=__skype_highlight_id_innerText><IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1> <IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1><IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1> <IMG height=1
alt="Web Bug from chrome://skype_ff_toolbar_win/content/space.gif"
src="MailScannerWebBug" width=1>717-292-2636</SPAN><SPAN
class=skype_tb_injection_left_img id=__skype_highlight_id_right_adge
style="BACKGROUND-IMAGE: url(chrome://skype_ff_toolbar_win/content/cb_normal_r.gif)">
<IMG class=skype_tb_img_adge style="WIDTH: 19px; HEIGHT: 11px" height=11
src="chrome://skype_ff_toolbar_win/content/cb_transparent_r.gif"></SPAN></SPAN></SPAN>,
</SPAN></FONT><FONT color=navy><SPAN style="COLOR: navy"><A
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:sheffer@sevengroup.com" target=_blank><FONT face=Arial
size=1><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: Arial">sheffer@sevengroup.com</SPAN></FONT></A></SPAN></FONT></P>
<P><FONT face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 7.5pt; COLOR: navy; FONT-FAMILY: Arial"><A
onclick="return top.js.OpenExtLink(window,event,this)"
href="http://www.sevengroup.com" target=_blank>www.sevengroup.com
</A></SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"></SPAN></FONT></P>
<P><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"></SPAN></FONT><FONT face=Arial><SPAN
style="FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P></DIV><PRE>==================<BR>You received this e-mail because you are subscribed <BR>to the <A onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:BLDG-SIM@GARD.COM" target=_blank>
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