<html 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" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Who knows?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>However, and until corrected by another who knows better, I would follow the instruction to leave out an economizer in Climate Zone 1b because it seems consistent with the pattern for warmer climates. My guess is that a zealous engineer mistakenly populated the table (6B) for that zone.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#0A3782'>James V Dirkes II, PE, BEMP, LEED AP</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3434F4'><br></span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.buildingperformanceteam.com/"><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#BFBFBF'>www.buildingperformanceteam.com</span></b></a></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#BFBFBF'> <br></span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#548DD4'>Energy Analysis, Commissioning & Training Services</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'><br></span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'>1631 Acacia Drive, Grand Rapids, MI 49504</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'> USA</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'><br>616 450 8653<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Chris Yates [mailto:chris.malcolm.yates@gmail.com] <br><b>Sent:</b> Thursday, June 13, 2013 7:16 AM<br><b>To:</b> Jim Dirkes<br><b>Cc:</b> bldg-sim@lists.onebuilding.org<br><b>Subject:</b> Re: [Bldg-sim] economiser for climate zone 1<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Great. A minor conundrum remains, quoting:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><i>"</i><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white'>Curiously, in my copy (90.1 2007) economisers are not required for <b>1b </b>(table G3.1.2.6A). However, the following table (G3.1.2.6B) denotes that economiser high limit shutoff should be 75degF for <b>1b</b>."</span></i><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-family:"Arial","sans-serif";color:#222222'>Chris</span><o:p></o:p></p><div><p class=MsoNormal>On Thu, Jun 13, 2013 at 12:09 PM, Jim Dirkes <<a href="mailto:jim@buildingperformanceteam.com" target="_blank">jim@buildingperformanceteam.com</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Correct.</span><o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center'><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#0A3782'>James V Dirkes II, PE, BEMP, LEED AP</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3434F4'><br></span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.buildingperformanceteam.com/" target="_blank"><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#BFBFBF'>www.buildingperformanceteam.com</span></b></a></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#BFBFBF'> <br></span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#548DD4'>Energy Analysis, Commissioning & Training Services</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'><br></span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'>1631 Acacia Drive, Grand Rapids, MI 49504 USA<br><a href="tel:616%20450%208653" target="_blank">616 450 8653</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Chris Yates [mailto:<a href="mailto:chris.malcolm.yates@gmail.com" target="_blank">chris.malcolm.yates@gmail.com</a>] <br><b>Sent:</b> Thursday, June 13, 2013 7:08 AM<br><b>To:</b> Jim Dirkes<br><b>Cc:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Bldg-sim] economiser for climate zone 1</span><o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks Jim,<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>So your understanding is that a mixing box still exists, but the control that varies outdoor air rate doesn't exist. It is in effect a fixed outdoor air rate.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>??<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Many thanks<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'>Chris<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Thu, Jun 13, 2013 at 11:48 AM, Jim Dirkes <<a href="mailto:jim@buildingperformanceteam.com" target="_blank">jim@buildingperformanceteam.com</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Chris,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>More warm weather = less available cooling from outdoor air = less justification for spending money to install economizer controls.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>p.s., You must provide minimum outdoor air for ventilation, but need not also cool with outdoor air</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center'><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#0A3782'>James V Dirkes II, PE, BEMP, LEED AP</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3434F4'><br></span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.buildingperformanceteam.com/" target="_blank"><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#BFBFBF'>www.buildingperformanceteam.com</span></b></a></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#BFBFBF'> <br></span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#548DD4'>Energy Analysis, Commissioning & Training Services</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'><br></span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#778188'>1631 Acacia Drive, Grand Rapids, MI 49504 USA<br><a href="tel:616%20450%208653" target="_blank">616 450 8653</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Chris Yates<br><b>Sent:</b> Thursday, June 13, 2013 6:36 AM<br><b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> [Bldg-sim] economiser for climate zone 1</span><o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Is it just me, or is does it seem terrifically wasteful that a climate 1 building doesn't require an economiser? Or am I missing something?<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>KR / Chris<o:p></o:p></p></div></div></div></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>