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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=690544117-28022006>Brian,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=690544117-28022006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=690544117-28022006>I think the answer is "it all depends." I would
be much more specific about what your client is aiming for. There are many
levels of robustness that you can deal with - anything from on-site
self-production of all site consumed energy to simply purchasing renewable
energy credits from others to offset your usage to even going beyond site energy
consumption and looking at overall project energy consumption with transport
impacts, source energy conversion efficiencies, etc. It is important to draw the
line clearly and clearly define what you are setting out to do. It is easy to
get carried away and also easy to overlook/ignore large impacts that may set
your client up for a PR disaster. For example, I opened a book up on "off-grid"
homes and saw a house in NYC - I was intrigued, but then disappointed to know
that it wasn't off-grid urban, it was just a house in NYC with a few PV panels
on the roof that met a portion of their electric demand. Be careful when using
vaguely defined terms like "net zero" - net zero what? You could have net zero
site emissions by using all electric systems...</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=690544117-28022006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=690544117-28022006>Carbon neutrality is an area where bio-fuels can work
if you consider that they are long-term carbon neutral. It all depends on
your and your client's definition of what they are trying to
do.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=690544117-28022006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=690544117-28022006>Peter</SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> BLDG-SIM@GARD.COM
[mailto:BLDG-SIM@GARD.COM] <B>On Behalf Of </B>Brian Thornton<BR><B>Sent:</B>
Tuesday, February 28, 2006 7:52 AM<BR><B>To:</B>
BLDG-SIM@GARD.COM<BR><B>Subject:</B> [BLDG-SIM] Net Zero--commercial
buildings<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Is there a clear “official”
definition of Net Zero, for homes, and/or separately for commercial or other
larger buildings? The term is being applied to some larger projects than
just homes. For taller buildings, the roof area gets to be too small to
meet the energy needs of the building just with PV, and wind is problematic in
urban settings. Can bio-diesel, wood pellets, or other “renewable” fuels
from off-site used in on-site generation, and/or combined heat and power, be
considered part of a “net zero” project? <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Brian
Thornton<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoAutoSig><st1:City w:st="on"><st1:place w:st="on"><FONT face=Arial
size=2><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial">Thornton</SPAN></FONT></st1:place></st1:City><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"> Energy
Consulting<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial">p. 503-231-6600 f.
503-231-3555<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><st1:PersonName w:st="on"><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial">thorntonenergy@comcast.net</SPAN></FONT></st1:PersonName><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P></DIV><PRE>
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