<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=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@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;}
@font-face
{font-family:"Franklin Gothic Book";
panose-1:2 11 5 3 2 1 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-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.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Franklin Gothic Book",sans-serif;
color:#1F497D;}
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.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Franklin Gothic Book",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;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@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='color:#1F497D'>HI Chris,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>The base fan power allowance already includes the necessary pressure drop for return/exhaust dampers in the air handler. The adjustment for exhaust/return control devices refers to damper boxes or other devices used to control space pressurization like you would typically find in a laboratory or hospital. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Cheers,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Michael Tillou, PE, LEED AP BD+C, ASHRAE BEMP<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Associate<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Atelier Ten<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Environmental Design Consultants + Lighting Designers<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>45 East 20th Street, 4th Floor<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>New York NY 10003<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>T +1 (212) 254 4500 x208<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>F +1 (212) 254 1259<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>michael.tillou@atelierten.com<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>www.atelierten.com<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Bldg-sim [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Jones, Christopher<br><b>Sent:</b> Wednesday, July 29, 2015 6:06 PM<br><b>To:</b> bldg-sim@onebuilding.org<br><b>Subject:</b> [Bldg-sim] ASHRAE 90.1 fan power limitation calculation question<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoPlainText>For the baseline fan power limitation, the pressure drop allowances are defined. I am a bit fuzzy on the definition of "Return/Exhaust Control Devices". A system with a return fan and OA economizer typically has dampers to control the flow of the OA, return/exhaust air streams. Would these dampers qualify as a Return/Exhaust Control Device?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'><img width=108 height=43 id="Picture_x0020_2" src="cid:image001.png@01D0CA30.86F24650" alt="cid:image003.png@01D09C46.E75BA0D0"></span><b><span style='color:#1C467A'><o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1C467A'>Christopher Jones,</span></b><b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'> </span></b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>P.Eng.<i> <br></i></span><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>Senior Engineer<b><o:p></o:p></b></span></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>WSP Canada Inc.<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>2300 Yonge Street, Suite 2300<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>Toronto, ON M4P 1E4</span><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#595959'><br></span><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>T +1 416-644-4226<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>F +1 416-487-9766<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>C +1 416-697-0065<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'><a href="http://www.wspgroup.com/">www.wspgroup.com</a> </span><i><span lang=EN-CA style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#565656'><o:p></o:p></span></i></p><p class=MsoPlainText><o:p> </o:p></p><div class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><hr size=2 width="100%" align=center></span></div><div><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:gray'><br>You are receiving this communication because you are listed as a current WSP contact. Should you have any questions regarding WSP’s electronic communications policy, please consult our Anti-Spam Commitment <a href="www.wspgroup.com/casl">www.wspgroup.com/casl</a>. For any concern or if you believe you should not be receiving this message, please forward this message to us at <a href="mailto:caslcompliance@wspgroup.com">caslcompliance@wspgroup.com</a> so that we can promptly address your request. This message is intended only for the use of the individual or entity to which it is addressed, and may contain information which is privileged, confidential, proprietary or exempt from disclosure under applicable law. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, you are strictly prohibited from disclosing, distributing, copying or in any way using this message. If you have received this communication in error, please notify the sender, and destroy and delete any copies you may have received. <br><br>WSP provides professional land surveying services through the following entities: WSP Surveys (AB) Limited Partnership and WSP Surveys (BC) Limited Partnership <o:p></o:p></span></p></div></div></body></html>