<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns="http://www.w3.org/TR/REC-html40" 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"><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.6000.16587" name=GENERATOR>
<STYLE>@font-face {
font-family: SimSun;
}
@font-face {
font-family: SimSun;
}
@font-face {
font-family: Calibri;
}
@font-face {
font-family: Tahoma;
}
@font-face {
font-family: @SimSun;
}
@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.0in 1.0in 1.0in; }
P.MsoNormal {
FONT-SIZE: 10pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman","serif"; punctuation-wrap: simple; mso-believe-normal-left: yes
}
LI.MsoNormal {
FONT-SIZE: 10pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman","serif"; punctuation-wrap: simple; mso-believe-normal-left: yes
}
DIV.MsoNormal {
FONT-SIZE: 10pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman","serif"; punctuation-wrap: simple; mso-believe-normal-left: yes
}
A:link {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlink {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
A:visited {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlinkFollowed {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.EmailStyle17 {
COLOR: windowtext; FONT-FAMILY: "Arial","sans-serif"; mso-style-type: personal
}
SPAN.EmailStyle18 {
COLOR: #1f497d; FONT-FAMILY: "Calibri","sans-serif"; mso-style-type: personal-reply
}
.MsoChpDefault {
FONT-SIZE: 10pt; mso-style-type: export-only
}
DIV.Section1 {
page: Section1
}
</STYLE>
</HEAD>
<BODY lang=EN-US style="MARGIN: 4px 4px 1px; FONT: 10pt Tahoma" vLink=purple
link=blue>
<DIV><SPAN class=156310100-13022008>On the topic of garage
ventilation...</SPAN></DIV>
<DIV><SPAN class=156310100-13022008></SPAN> </DIV>
<DIV><SPAN class=156310100-13022008>What if the garage exhaust fans could be
turned off for a portion of the year. In my case, I have a project that is
looking to use the cooling tower to provide half of the exhaust when the cooling
tower is on. If the exhaust fans were staged off when the cooling tower was on,
would it be reasonable to claim fan energy reduction using hourly report data
and suibmit as an exceptional calc?</SPAN></DIV>
<DIV><SPAN class=156310100-13022008></SPAN> </DIV>
<DIV><SPAN class=156310100-13022008>Thanks,</SPAN></DIV>
<DIV><SPAN class=156310100-13022008>Mitch</SPAN></DIV>
<DIV><SPAN class=156310100-13022008></SPAN> </DIV>
<DIV><SPAN class=156310100-13022008>
<DIV class=Section1>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"> <o:p></o:p></P>
<P style="MARGIN-BOTTOM: 6pt"><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Mitchell J. Dec</SPAN></B><BR><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Senior Energy
Analyst</SPAN><BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">LEEDŽ
Accredited Professional</SPAN></SPAN></P>
<P style="MARGIN-BOTTOM: 6pt"><FONT face=Arial size=2></FONT><A
href="http://www.glumac.com/"><SPAN
style="TEXT-DECORATION: none; text-underline: none"><IMG height=37
src="cid:156310100@13022008-164e" width=339 border=0
v:shapes="_x0000_i1025"><FONT face=Arial color=#000000
size=2></FONT></P></SPAN></A><o:p></o:p>
<DIV style="MARGIN-BOTTOM: 6pt">
<HR style="WIDTH: 247.5pt" align=left width=330 color=#9acb33 noShade SIZE=2>
</DIV>
<P><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">320 SW Washington, Suite
200</SPAN><BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Portland, OR
97204-2640</SPAN><BR><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">T.
503.227.5280 F. 503.274.7674<BR>Direct: <SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">503.345.6283</SPAN></SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN><BR><B><SPAN
style="COLOR: #333333">Thinking. Inside the
building.</SPAN></B></SPAN><BR><U><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><A
href="http://www.glumac.com/"
target=_blank>http://www.glumac.com/</A></SPAN></U> </P></DIV></SPAN></DIV>
<DIV><SPAN class=156310100-13022008></SPAN> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left>-----Original
Message-----<BR><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org]<B>On Behalf Of </B>Fred
Porter<BR><B>Sent:</B> Tuesday, February 12, 2008 1:28 PM<BR><B>To:</B>
Michael Tillou; bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> Re:
[Bldg-sim] Garage Ventilation and LEED Credit EA-1<BR><BR></DIV>
<DIV>>>> "Michael Tillou" <michael.tillou@gmail.com> 2/12/2008
1:31 PM >>><BR></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff><SPAN
class=109582720-12022008>Does anyone know if USGBC is allowing credit for CO
Control of parking garage ventilation? If anyone has any experience with
successfully getting credit for this efficiency measure can you please let me
know. I am curious what is considered a reasonable
baseline.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff><SPAN
class=109582720-12022008></SPAN></FONT><FONT face=Arial color=#0000ff><SPAN
class=109582720-12022008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><SPAN lang=EN-AU
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p>
<DIV>Dear Colleagues;</DIV>
<DIV>Short answer: I sure hope not!</DIV>
<DIV> </DIV>
<DIV>I very much believe the "reasonable" baseline is CO sensors, so you would
schedule the airflows (thus power, if all goes correctly in model
land) proportional to some assumed activity schedule. (There is a
good summary of what those flows might be in an ASHRAE Jrnl that's about
ten years old but on the AJ website.) CO control is pretty much
SOP; I think the IMC, or one of the codes around here, went up to
1.25 cfm/sf constant venting unless CO sensors are used; pretty much
assuring everyone uses sensors. There may still be a code req'd floor on
the min vent rate even w/sensors. And, in all but the smallest garages,
staged fans are typical. MAYBE someone could invent some rationale that
if there were some long ducts serving a deep garage, then VSD fans might have
a SLIGHTLY lower operating W/cfm and closer tracking of actual req'd
dilution air. But not by much.</DIV>
<DIV> </DIV>
<DIV>Sure it sounds like "DCV" and the PRM sez we can take credit for that;
but we would be creating a baseline considerably worse than typical
construction, even 5-10 year old construction. And certainly we can't use
0.7 W/cfm in this baseline. This is why when we get
proposals from savvy clients, they specify bldg maximum Btu/sf or
kWh/sf or emissions/sf; not some "savings" vs. an
artificial baseline. </DIV>
<DIV> </DIV>
<DIV>Fred</DIV>
<DIV> </DIV>
<DIV>P.S. Today's Puzzler: What ASHRAE PRM category does a heated parking
garage fall into? Does it matter if the heating capacity is more than the
semi-conditioned space Btuh/sf rate? </DIV>
<DIV><BR></DIV></o:p></SPAN></DIV></BLOCKQUOTE></BODY></HTML>