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<DIV>I can't remember if the PVVT system allows for a performance curve in respect to the compressors, but any time I need to build staging into HVAC I go there first (assuming you haven't already).</DIV>
<DIV> </DIV>
<DIV>Just a thought...</DIV>
<DIV> </DIV>
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<DIV>Matthew Higgins, LEED-AP, ASHRAE-HBDP</DIV>
<DIV>Associate Building Performance Specialist</DIV>
<DIV> </DIV>
<DIV>Environmental Dynamics, Inc.<BR>Architecture and Sustainability Consulting Services<BR>505.242.2851 x.103<BR>web. edi-arch.com</DIV>
<DIV> </DIV>
<DIV><FONT size=1>Any data provided by the Consultant, verbal or written, are to be considered opinions of building energy and/or daylight performance. The Client understands that the Consultant has no control of occupant habits, equipment or material performance or characteristics, site or climate conditions or the Contractor's method of assembly, and that the Consultant's opinions regarding building energy/daylight performance are made on the basis of the Consultant's professional judgment and experience. The Consultant makes no warranty, express or implied, that the energy/daylight performance of the building will not vary from the Consultant's opinion of building energy/daylight performance.</FONT></DIV><BR><BR>>>> "Bishop, Bill" <wbishop@pathfinder-ea.com> 4/30/2010 8:27 AM >>><BR></DIV>
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<P class=MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Any suggestions on how to model condensing units with two-stage compressors? I am modeling PVVT systems.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Thanks,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Bill<o:p></o:p></SPAN></FONT></P>
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<P class=MsoNormal><B style="mso-bidi-font-weight: normal"><FONT color=black size=2 face="Franklin Gothic Medium Cond"><SPAN style="FONT-FAMILY: 'Franklin Gothic Medium Cond'; COLOR: black; FONT-SIZE: 10pt; FONT-WEIGHT: bold; mso-bidi-font-weight: normal; mso-no-proof: yes">William Bishop, EIT, BEMP, LEED<SUP>®</SUP> AP </SPAN></FONT></B><B style="mso-bidi-font-weight: normal"><FONT color=#006600 size=2 face="Franklin Gothic Medium Cond"><SPAN style="FONT-FAMILY: 'Franklin Gothic Medium Cond'; COLOR: #006600; FONT-SIZE: 10pt; FONT-WEIGHT: bold; mso-bidi-font-weight: normal; mso-no-proof: yes">|</SPAN></FONT></B><B style="mso-bidi-font-weight: normal"><FONT color=black size=2 face="Franklin Gothic Medium Cond"><SPAN style="FONT-FAMILY: 'Franklin Gothic Medium Cond'; COLOR: black; FONT-SIZE: 10pt; FONT-WEIGHT: bold; mso-bidi-font-weight: normal; mso-no-proof: yes"> </SPAN></FONT></B><B style="mso-bidi-font-weight: normal"><FONT color=black size=2 face="Franklin Gothic Medium Cond"><SPAN style="FONT-FAMILY: 'Franklin Gothic Medium Cond'; COLOR: black; FONT-SIZE: 10pt; FONT-WEIGHT: bold; mso-bidi-font-size: 12.0pt; mso-bidi-font-weight: normal; mso-no-proof: yes">Pathfinder Engineers & Architects LLP</SPAN></FONT></B><B><FONT color=black size=2 face="Franklin Gothic Medium Cond"><SPAN style="FONT-FAMILY: 'Franklin Gothic Medium Cond'; COLOR: black; FONT-SIZE: 10pt; FONT-WEIGHT: bold; mso-no-proof: yes"><o:p></o:p></SPAN></FONT></B></P>
<P class=MsoNormal><FONT color=black size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; COLOR: black; FONT-SIZE: 9pt; mso-no-proof: yes">Mechanical Engineer<o:p></o:p></SPAN></FONT></P>
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<P class=MsoNormal><st1:address style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom" tabIndex=0 w:st="on"><st1:Street w:st="on"><FONT size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 9pt; mso-no-proof: yes">134 South Fitzhugh Street</SPAN></FONT></st1:Street><FONT size=1><SPAN style="FONT-SIZE: 9pt; mso-no-proof: yes"><BR></SPAN></FONT><st1:City w:st="on"><FONT size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 9pt; mso-no-proof: yes">Rochester</SPAN></FONT></st1:City><FONT size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 9pt; mso-no-proof: yes">, <st1:State w:st="on">NY</st1:State> <st1:PostalCode w:st="on">14608</st1:PostalCode></SPAN></FONT></st1:address><FONT size=1><SPAN style="FONT-SIZE: 9pt; mso-no-proof: yes"><BR></SPAN></FONT><FONT size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 9pt; mso-no-proof: yes">T: (585) 325-6004 <FONT color=black><SPAN style="COLOR: black">Ext. 114</SPAN></FONT></SPAN></FONT><FONT size=1><SPAN style="FONT-SIZE: 9pt; mso-no-proof: yes"><BR></SPAN></FONT><FONT size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 9pt; mso-no-proof: yes">F: (585) 325-6005</SPAN></FONT><FONT color=black size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; COLOR: black; FONT-SIZE: 9pt; mso-bidi-font-size: 12.0pt; mso-no-proof: yes"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=black size=1 face=Arial><SPAN style="FONT-FAMILY: Arial; COLOR: black; FONT-SIZE: 9pt; mso-no-proof: yes">wbishop@pathfinder-ea.com<o:p></o:p></SPAN></FONT></P>
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