<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.6000.17023" name=GENERATOR></HEAD>
<BODY>
<DIV dir=ltr align=left><SPAN class=001232515-28042010><FONT face=Arial
color=#0000ff size=2>Pasha,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=001232515-28042010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=001232515-28042010><FONT face=Arial
color=#0000ff size=2>I've attached the models of each. After reading thru
the topics on the PVVT system, I think I may have modeled it wrong it regards to
the zoning, they recommend grouping zones served by one unit into one zone,
whereas I had modelled each zone with a VAV box separately. Additionally
my previous presumption was wrong, because when I turned off all baseboards for
both models, I still got the same results, that is more gas usage at the systems
with PSZ than PVVT, which is puzzling to
me. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=001232515-28042010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=001232515-28042010><FONT face=Arial
color=#0000ff size=2>If anyone can untie this knot I created, it would be
greatly appreciated.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=001232515-28042010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=001232515-28042010><FONT face=Arial
color=#0000ff size=2>thanks,</FONT></SPAN></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV align=left><FONT face=Garamond color=#757575 size=3>Nick Couture, LEED
AP</FONT></DIV>
<DIV align=left><FONT face=Garamond
color=#757575>Mechanical Engineer</FONT>
<P><FONT size=2><IMG alt="" hspace=0 src="cid:001232515@28042010-03F0"
align=baseline border=0></FONT></P></DIV>
<DIV align=left><STRONG><FONT face=Garamond></FONT></STRONG></DIV>
<DIV align=left><FONT size=2></FONT></DIV>
<DIV align=left>
<DIV align=left>
<P><FONT face=Garamond color=gray size=2>3555 Veteran's Memorial Highway, Suite
M</FONT><FONT face=Garamond color=gray><BR></FONT><FONT face=Garamond color=gray
size=2>Ronkonkoma, NY 11779</FONT><FONT face=Garamond
color=gray><BR></FONT><FONT face=Garamond color=gray size=2>Tel:
631.981.3990 ext. 230</FONT><FONT face=Garamond color=gray><BR></FONT><FONT
face=Garamond color=gray size=2>Fax: 631.981.3971</FONT><FONT face=Garamond
color=gray><BR></FONT><FONT face=Garamond color=gray
size=2>ncouture@emtec-engineers.com</FONT><FONT face=Garamond
color=gray><BR></FONT></P>
<P><A title="Emtec Consulting Engineers"
href="http://www.emtec-engineers.com/"><FONT
title=http://www.emtec-engineers.com/ color=green>www.emtec-engineers.com
</FONT></A></P>
<DIV align=left><FONT face=Garamond size=1>This message is intended only for the
personal and confidential use of the designated recipient(s) named above. This
is not in anyway an official statement of Emtec Consultants or solicitation to
buy our services. Emtec Consultants does not guarantee this Email transmission
to be secure or error-free. Any reproduction or changes to our drawings and
files without the consent of Emtec Consultants is strictly
prohibited.</FONT></DIV></DIV></DIV>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Pasha Korber-Gonzalez
[mailto:pasha.pkconsulting@gmail.com] <BR><B>Sent:</B> Wednesday, April 28, 2010
11:02 AM<BR><B>To:</B> Nicholas Couture, LEED AP<BR><B>Cc:</B>
equest-users@lists.onebuilding.org<BR><B>Subject:</B> Re: [Equest-users] PVVT
vs. PSZ<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Hi Nick,</DIV>
<DIV> </DIV>
<DIV>based on my brief skimming through the descriptions of the system types you
are working with (see attached docs.) I concur with your explanation if it
is the case that you have specified or 'turned on' baseboards in the specific
zones that are not the control zone for the system. If you do not have the
baseboards turned on in your model then your heat energy is coming from
somewhere else. If you attach your .pd2 & .inp files we can look at
your inputs and give you some specific feedback on your model file.</DIV>
<DIV> </DIV>
<DIV>Also, have you looked at your 'hours out of throttling range' for these
adjacent zones? Look at your BEPS/BEPU reports and the SS-F or SS-R
reports as well. Maybe they are significantly underheated, or maybe they
are already satisfied for thier thermal conditioning requirements....its good to
just confirm this.</DIV>
<DIV> </DIV>
<DIV>pasha<BR><BR></DIV>
<DIV class=gmail_quote>On Wed, Apr 28, 2010 at 6:53 AM, Nicholas Couture, LEED
AP <SPAN dir=ltr><<A
href="mailto:ncouture@emtec-engineers.com">ncouture@emtec-engineers.com</A>></SPAN>
wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff size=2>I'd like
to propose an answer my own question to the group and ask if this makes
sense... I'm getting additional baseboard heat in some of the PVVT
zones. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff size=2>Take
the several zones a unit serves. One of them is the control
zone, same for PSZ and PVVT. For a PSZ when the control zone is
satisfied the other zones are also satisfied, because there is no
additional baseboard heat, the constant airflow must be keeping the other
zones satisfied. For a PVVT the control zone is satisfied, and airflow
reduces and the other zones are not satisfied requiring additional baseboard
heat.</FONT></SPAN></DIV>
<DIV class=im>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV align=left><FONT size=2></FONT> </DIV>
<DIV align=left><FONT face=Garamond color=#757575 size=3>Nick Couture, LEED
AP</FONT></DIV>
<DIV align=left><FONT face=Garamond
color=#757575>Mechanical Engineer</FONT>
<P><FONT size=2><IMG alt="" hspace=0 src="cid:001232515@28042010-03F7"
align=baseline border=0></FONT></P></DIV>
<DIV align=left><STRONG><FONT face=Garamond></FONT></STRONG></DIV>
<DIV align=left><FONT size=2></FONT></DIV>
<DIV align=left>
<DIV align=left>
<P><FONT face=Garamond color=gray size=2>3555 Veteran's Memorial Highway,
Suite M</FONT><FONT face=Garamond color=gray><BR></FONT><FONT face=Garamond
color=gray size=2>Ronkonkoma, NY 11779</FONT><FONT face=Garamond
color=gray><BR></FONT><FONT face=Garamond color=gray size=2>Tel:
631.981.3990 ext. 230</FONT><FONT face=Garamond color=gray><BR></FONT><FONT
face=Garamond color=gray size=2>Fax: 631.981.3971</FONT><FONT face=Garamond
color=gray><BR></FONT><FONT face=Garamond color=gray size=2><A
href="mailto:ncouture@emtec-engineers.com"
target=_blank>ncouture@emtec-engineers.com</A></FONT><FONT face=Garamond
color=gray><BR></FONT></P>
<P><A title="Emtec Consulting Engineers"
href="http://www.emtec-engineers.com/" target=_blank><FONT
title=http://www.emtec-engineers.com/ color=green>www.emtec-engineers.com
</FONT></A></P>
<DIV align=left><FONT face=Garamond size=1>This message is intended only for
the personal and confidential use of the designated recipient(s) named above.
This is not in anyway an official statement of Emtec Consultants or
solicitation to buy our services. Emtec Consultants does not guarantee this
Email transmission to be secure or error-free. Any reproduction or changes to
our drawings and files without the consent of Emtec Consultants is strictly
prohibited.</FONT></DIV></DIV></DIV>
<DIV> </DIV><BR></DIV>
<DIV lang=en-us dir=ltr align=left>
<HR>
<FONT face=Tahoma size=2><B>From:</B> <A
href="mailto:equest-users-bounces@lists.onebuilding.org"
target=_blank>equest-users-bounces@lists.onebuilding.org</A> [mailto:<A
href="mailto:equest-users-bounces@lists.onebuilding.org"
target=_blank>equest-users-bounces@lists.onebuilding.org</A>] <B>On Behalf Of
</B>Nicholas Couture, LEED AP<BR><B>Sent:</B> Tuesday, April 27, 2010 4:39
PM<BR><B>To:</B> <A href="mailto:equest-users@lists.onebuilding.org"
target=_blank>equest-users@lists.onebuilding.org</A><BR><B>Subject:</B>
[Equest-users] PVVT vs. PSZ<BR></FONT><BR></DIV>
<DIV>
<DIV></DIV>
<DIV class=h5>
<DIV></DIV>
<DIV><SPAN><FONT face=Arial size=2>Hello,</FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial size=2>I'm comparing a PVVT against PSZ
systems in the DD wizard mode. On the heating side I'm
keeping everything the same, that is furnaces at 80% AFUE
and baseboard, all heating settings including the boilers are set up the
same. I'm getting more fuel use for the PVVT system than the PSZ
system. Can anyone explain why that is?</FONT></SPAN></DIV>
<DIV><SPAN><FONT face=Arial size=2></FONT></SPAN> </DIV>
<DIV><SPAN><FONT face=Arial size=2>thanks,</FONT></SPAN></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV align=left><FONT face=Garamond color=#757575 size=3>Nick Couture, LEED
AP</FONT></DIV>
<DIV align=left><FONT face=Garamond
color=#757575>Mechanical Engineer</FONT>
<P><FONT size=2><IMG alt="" hspace=0 src="cid:001232515@28042010-03FE"
align=baseline border=0></FONT></P></DIV>
<DIV align=left><STRONG><FONT face=Garamond></FONT></STRONG></DIV>
<DIV align=left><FONT size=2></FONT></DIV>
<DIV align=left>
<DIV align=left>
<P><FONT face=Garamond color=gray size=2>3555 Veteran's Memorial Highway,
Suite M</FONT><FONT face=Garamond color=gray><BR></FONT><FONT face=Garamond
color=gray size=2>Ronkonkoma, NY 11779</FONT><FONT face=Garamond
color=gray><BR></FONT><FONT face=Garamond color=gray size=2>Tel:
631.981.3990 ext. 230</FONT><FONT face=Garamond color=gray><BR></FONT><FONT
face=Garamond color=gray size=2>Fax: 631.981.3971</FONT><FONT face=Garamond
color=gray><BR></FONT><FONT face=Garamond color=gray size=2><A
href="mailto:ncouture@emtec-engineers.com"
target=_blank>ncouture@emtec-engineers.com</A></FONT><FONT face=Garamond
color=gray><BR></FONT></P>
<P><A title="Emtec Consulting Engineers"
href="http://www.emtec-engineers.com/" target=_blank><FONT
title=http://www.emtec-engineers.com/ color=green>www.emtec-engineers.com
</FONT></A></P>
<DIV align=left><FONT face=Garamond size=1>This message is intended only for
the personal and confidential use of the designated recipient(s) named above.
This is not in anyway an official statement of Emtec Consultants or
solicitation to buy our services. Emtec Consultants does not guarantee this
Email transmission to be secure or error-free. Any reproduction or changes to
our drawings and files without the consent of Emtec Consultants is strictly
prohibited.</FONT></DIV></DIV></DIV>
<DIV> </DIV></DIV></DIV></DIV><BR>_______________________________________________<BR>Equest-users
mailing list<BR><A
href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org"
target=_blank>http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</A><BR>To
unsubscribe from this mailing list send a blank message to <A
href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</A><BR><BR></BLOCKQUOTE></DIV><BR></BODY></HTML>