<html><head></head><body><div style="font-family:verdana, helvetica, sans-serif;font-size:medium;"><div><div>Too early in the morning for deep thinking.Wait for Nick Caton for best answer.</div></div><div><br></div><div>One can manipulate airflow (and outdoor air) by hour for one's purpose. How much energy savings is questionable.</div><div><br></div><div>If you have a VAV system, airflow will automatically reduce when load reduces. Might be the best way to simulate it, even if you have no VAV. Just keep people and lighting at same level, until an unoccupied period happens.</div><div><br></div><div>John</div><div><br></div><div id="yahoo_quoted_0630654053" class="yahoo_quoted"><div>On Thursday, March 16, 2017, 9:00:21 AM PDT, Michael Mantai <mmantai@systemworcx.com> wrote:</div><div><div id="yiv2216308810"><html><head><style>#yiv2216308810 #yiv2216308810 --
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#yiv2216308810 </style></head><div><div class="yiv2216308810WordSection1"><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;">I’ve never tried to account for this in a model, although we’ve had several projects connect HVAC to occupancy sensors. I’m wondering if you could adjust the zone min. airflow setpoint to the lower unoccupied setpoint for 10% of the occupied hours, to kind of match the 10% reduction in LPD per Appendix G. If the zone temperature setpoint is also reset based on the occupancy sensor, it seems like you could also adjust the temperature setpoint schedules in eQuest to the lower/higher unoccupied settings for 10% of the occupied hours. My guess is this would have negligible effect on energy savings, but maybe not.</span></p><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;"> </span></p><div class="yiv2216308810yqt5600601717" id="yiv2216308810yqt41334"><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in;"><p class="yiv2216308810MsoNormal"><b><span style="font-family:Calibri;color:black;">From: </span></b><span style="font-family:Calibri;color:black;">Equest-users <equest-users-bounces@lists.onebuilding.org> on behalf of Manuela Mengue via Equest-users <equest-users@lists.onebuilding.org><br clear="none"><b>Reply-To: </b>Manuela Mengue <mmengue@dagherengineering.com><br clear="none"><b>Date: </b>Thursday, March 16, 2017 at 10:59 AM<br clear="none"><b>To: </b>John Aulbach <jra_sac@yahoo.com>, "'equest-users@lists.onebuilding.org'" <equest-users@lists.onebuilding.org><br clear="none"><b>Subject: </b>Re: [Equest-users] HVAC Occupancy Sensors</span></p></div><div><p class="yiv2216308810MsoNormal"> </p></div><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;color:black;">John,</span></p><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;color:black;"> </span></p><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;color:black;">See Appendix G – Table G3.2 (2) Occupancy sensor for Non-24h and <5000 ft2.</span></p><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;color:black;"> </span></p><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;">My question pertained to the HVAC component which achieves additional savings for installing occupancy sensors.</span></p><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;color:black;"> </span></p><div><p class="yiv2216308810MsoNormal" style="background:white;"><span style="font-size:11.0pt;font-family:Calibri;color:black;">Best regards,</span></p><p class="yiv2216308810MsoNormal" style="background:white;"><span style="font-size:10.0pt;"> </span></p><p class="yiv2216308810MsoNormal" style="background:white;"><span style="font-size:10.0pt;">Manuela Mengue</span></p><p class="yiv2216308810MsoNormal" style="background:white;"><span style="font-size:10.0pt;">Design Engineer</span></p></div><p class="yiv2216308810MsoNormal"><span style="font-size:11.0pt;font-family:Calibri;color:black;"> </span></p><div><div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in;"><p class="yiv2216308810MsoNormal"><b><span style="font-size:11.0pt;font-family:Calibri;">From:</span></b><span style="font-size:11.0pt;font-family:Calibri;"> John Aulbach [mailto:jra_sac@yahoo.com] <br clear="none"><b>Sent:</b> Thursday, March 16, 2017 10:38 AM<br clear="none"><b>To:</b> Manuela Mengue <mmengue@dagherengineering.com>; 'equest-users@lists.onebuilding.org' <equest-users@lists.onebuilding.org><br clear="none"><b>Subject:</b> Re: [Equest-users] HVAC Occupancy Sensors</span></p></div></div><p class="yiv2216308810MsoNormal"> </p><div><div><div><p class="yiv2216308810MsoNormal"><span style="font-size:13.5pt;font-family:Verdana;">Somewhere, in the mysteries of space, I have always been told to use 15% less lighting for the proposed case for occupancy sensors. I am unsure of the source. ASHRAE ??</span></p></div></div><div><p class="yiv2216308810MsoNormal"><span style="font-size:13.5pt;font-family:Verdana;"> </span></p></div><div><p class="yiv2216308810MsoNormal"><span style="font-size:13.5pt;font-family:Verdana;">John R. Aulbach, PE</span></p></div><div><p class="yiv2216308810MsoNormal"><span style="font-size:13.5pt;font-family:Verdana;"> </span></p></div><div id="yiv2216308810yahoo_quoted_0322054808"><div><p class="yiv2216308810MsoNormal"><span style="font-size:13.5pt;font-family:Verdana;">On Thursday, March 16, 2017, 6:02:34 AM PDT, Manuela Mengue via Equest-users <</span><a rel="nofollow" shape="rect" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org"><span style="font-size:13.5pt;font-family:Verdana;">equest-users@lists.onebuilding.org</span></a><span style="font-size:13.5pt;font-family:Verdana;">> wrote:</span></p></div><div><div id="yiv2216308810"><div><div><p class="yiv2216308810msonormal"><span style="font-size:13.5pt;font-family:Verdana;color:black;">Hi all,</span></p><p class="yiv2216308810msonormal"><span style="font-size:13.5pt;font-family:Verdana;color:black;"> </span></p><p class="yiv2216308810msonormal"><span style="font-size:13.5pt;font-family:Verdana;color:black;">Has anyone succeeded to model HVAC occupancy sensors in eQuest? In this project, supply air from AHU units feed into VAV boxes in classrooms. The VAV boxes modulate airflow in accordance to occupancy sensor readings. The ASHRAE Table G3.2 allows us to take credit for lighting controls, however, I could not find guidance on HVAC occupancy sensors for energy models. My first approach would be to adjust occupancy levels in Proposed (how?), but this raises another question: doesn’t LEED require to use the same schedules in Proposed and Baseline?</span></p><p class="yiv2216308810msonormal"><span style="font-size:13.5pt;font-family:Verdana;color:black;"> </span></p><div><p class="yiv2216308810msonormal" style="background:white;"><span style="font-size:13.5pt;font-family:Verdana;color:black;">Thanks in advance for your suggestions,</span></p><p class="yiv2216308810msonormal" style="background:white;"><span style="font-size:10.0pt;font-family:Verdana;color:black;"> </span></p><p class="yiv2216308810msonormal" style="background:white;"><span style="font-size:10.0pt;font-family:Verdana;color:black;">Manuela Mengue</span></p><p class="yiv2216308810msonormal" style="background:white;"><span style="font-size:10.0pt;font-family:Verdana;color:black;">Design Engineer</span></p></div><p class="yiv2216308810msonormal"><span style="font-size:13.5pt;font-family:Verdana;"> </span></p></div></div></div><p class="yiv2216308810MsoNormal"><span style="font-size:13.5pt;font-family:Verdana;">_______________________________________________<br clear="none">Equest-users mailing list<br clear="none"></span><a rel="nofollow" shape="rect" target="_blank" href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org"><span style="font-size:13.5pt;font-family:Verdana;">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</span></a><span style="font-size:13.5pt;font-family:Verdana;"><br clear="none">To unsubscribe from this mailing list send a blank message to </span><a rel="nofollow" shape="rect" ymailto="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" target="_blank" href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG"><span style="font-size:13.5pt;font-family:Verdana;">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</span></a></p></div></div></div></div><p class="yiv2216308810MsoNormal">_______________________________________________ Equest-users mailing list http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org To unsubscribe from this mailing list send a blank message to EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG </p></div></div></html></div></div></div></div></body></html>