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<DIV><SPAN class=341500112-30082004><FONT face=Arial><FONT color=#0000ff><FONT
size=2>The purpose of ECBM is allow trade-offs like you describe. The
lighting may exceed prescriptive requirements<SPAN class=788030312-30082004>
(like in your case)</SPAN><SPAN class=788030312-30082004>, but other building
components would need to have better performance to bring the proposed building
into compliance. You would need to demonstrate compliance using a building
energy simulation program described in section 11 of ASHRAE
90.1.</SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=341500112-30082004><FONT face=Arial><FONT color=#0000ff><FONT
size=2><SPAN class=788030312-30082004></SPAN></FONT></FONT></FONT></SPAN><SPAN
lang=en-us><!-- Converted from text/rtf format -->
<P><FONT face=Arial><FONT size=2><SPAN lang=en-us>Mark Zoeteman<SPAN
class=788030312-30082004>, P.E.</SPAN></SPAN><BR><SPAN lang=en-us>FTC&H,
Inc.</SPAN> <BR><SPAN lang=en-us>(616) 464-3739</SPAN> <BR><SPAN
lang=en-us><U>mrzoeteman@ftch.com</U></SPAN> </FONT></FONT></P><FONT face=Arial
size=2></FONT></SPAN></DIV></DIV>
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<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Ketterer, Al
[mailto:Al.Ketterer@benham.com] <BR><B>Sent:</B> Saturday, August 28, 2004
9:27 AM<BR><B>To:</B> BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] ASHRAE
90.1 Energy Cost Budget Method<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=628241213-28082004>Does anyone have
any experience with using ASHRAE 90.1-2001 and proving compliance through the
Energy Cost Budget Method? There's a statement in Section 11.3.8 that says
lighting power in the proposed design shall be determined in accordance with
section 9.3. Section 9.3 gives the prescriptive path for determining lighting
power allowance by both the building area method or the space by space
method.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=628241213-28082004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=628241213-28082004>My question comes
in, that for the building I am trying to prove compliance for, the actual
lighting exceeds the lighting allowance, which for this building is 1.3 w/sf.
The actual lighting is on the order of 2 to 2.25 w/sf. If I prove that the
proposed building even with these higher lighting levels has a lower design
energy cost than the budget building is the proposed building in compliance
with ASHRAE 90.1? I take this to be a trade off, but the wording in section
11.3.8 confuses the issue. In the User's Manual for ASHRAE 90.1 under
documentation compliance, it says that a written description of those energy
features that either exceed the minimal requirements or that are less than the
requirements must be documented. This shows the plan checker which items are
involved in the trade-offs.</SPAN></FONT></DIV>
<DIV> </DIV>
<DIV class=Section1>
<P><B><SPAN style="FONT-SIZE: 10pt">Albert E. Ketterer, PE</SPAN></B><BR><SPAN
style="FONT-SIZE: 10pt">Senior Mechanical Engineer and Mechanical Discipline
Manager</SPAN><SPAN style="FONT-FAMILY: Arial"><o:p></o:p></SPAN></P>
<P style="MARGIN: 0in 0in 0pt"><B><SPAN
style="COLOR: #333399; mso-bidi-font-size: 10.0pt">The Benham
Companies</SPAN></B><BR><SPAN style="FONT-SIZE: 10pt">3668 S. Geyer
Rd.</SPAN><SPAN style="FONT-FAMILY: Arial"><BR></SPAN><SPAN
style="FONT-SIZE: 10pt">St. Louis, MO 63127-1243<o:p></o:p></SPAN></P>
<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt">314/821-7017 ext.
109 voice</SPAN><SPAN style="FONT-FAMILY: Arial"><BR></SPAN><SPAN
style="FONT-SIZE: 10pt">314/315-8509 direct</SPAN><SPAN
style="FONT-FAMILY: Arial"><BR></SPAN><SPAN
style="FONT-SIZE: 10pt">314/821-8499 fax</SPAN><SPAN
style="FONT-FAMILY: Arial"><BR></SPAN><U><SPAN
style="FONT-SIZE: 10pt; COLOR: #333399">Al.Ketterer@Benham.com</SPAN></U><SPAN
style="FONT-SIZE: 10pt"> email</SPAN><SPAN style="FONT-FAMILY: Arial">
</SPAN></P></DIV>
<DIV> </DIV><PRE>
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