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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'>Hi!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'>G3.1.2.1 is pretty clear that for the baseline model you’re supposed to use the minimum equipment efficiencies shown in Section 6.4. In other words, the single zone gas furnace you reference would be baseline-modeled per Table 6.8.1E, so a small gas furnace (<225 MBH) would be 78% AFUE.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'>So your equipment EEM in your design case would be the 94% furnace.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'>The only way I know this is because I’m working on a building with 6 of these little guys.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'>Good luck!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light";color:#333333'>MARK DARRALL, AIA, LEED AP BD+C, NCARB<br>Senior Project Manager<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light";color:#333333'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light";color:#333333'><img width=136 height=55 id="Picture_x0020_1" src="cid:image001.jpg@01CBF299.08F149E0" alt=a2so4-email></span><span style='font-size:10.0pt;font-family:"Univers LT 45 Light";color:#333333'><o:p></o:p></span></p><p class=MsoNormal style='text-indent:.5in'><span style='font-size:10.0pt;font-family:"Univers LT 45 Light"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light"'>DESIGN ENRICHING LIFE // LIFE ENRICHING DESIGN<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light";color:#333333'>A2SO4 Architecture, LLC<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light";color:#333333'>Union Station</span><span style='font-size:8.0pt;font-family:"Univers LT 45 Light"'><br><span style='color:#333333'>300 South Meridian Street / 250</span><br><span style='color:#333333'>Indianapolis</span>, <span style='color:#333333'>Indiana</span> <span style='color:#333333'>46225</span><br>TEL 317 388 8850<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light"'>FAX 317 280 0692<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Univers LT 45 Light"'>MOB 765 749 0841<br><span style='color:#333333'><a href="www.a2so4.com">www.a2so4.com</a></span><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Calibri","sans-serif";color:green'>Please consider the environment before printing this e-mail</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:green'>.</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:navy'> </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#333333'> </span><span style='font-size:11.0pt;font-family:"Univers LT 45 Light"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Calibri","sans-serif";color:#333333'>CONFIDENTIALITY NOTICE: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient, you may not review, copy or distribute this message. If you have received this email in error, please notify the sender immediately and delete the original message. Neither the sender nor the company for which he or she works accepts any liability for any damage caused by any virus transmitted by this email.</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Univers LT 55"'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><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"'> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Carol Gardner<br><b>Sent:</b> Wednesday, March 30, 2011 8:59 PM<br><b>To:</b> Kathryn Kerns<br><b>Cc:</b> equest-users@lists.onebuilding.org; Steve Butros<br><b>Subject:</b> Re: [Equest-users] Baseline HVAC Single Zone Furnace Operation.<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Sorry I accidentally hit the send button.<br><br>I was saying, my take on modeling systems that Appendix G and the rest of Standard 90 don't supply specific requirements for is to make them reasonably inefficient. I say reasonably because it has to be within reason, so that you can't be accused of gaming the system. In this case you have further justification for using the modulating baseline as you truly don't have any information about staging, <br><br>Cheers,<br><br>Carol<o:p></o:p></p><div><p class=MsoNormal>On Wed, Mar 30, 2011 at 5:53 PM, Carol Gardner <<a href="mailto:cmg750@gmail.com">cmg750@gmail.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hi Kathryn,<br><br>Thanks for sharing your solution to the Georgia project. It sounds like a really good idea, simple yet effective. It's funny I don't think I would have thought of using 2 DOAS units, but why not?<br><br>WRT to the furnace. My ta<o:p></o:p></p><div><div><div><p class=MsoNormal>On Wed, Mar 30, 2011 at 1:59 PM, Kathryn Kerns <<a href="mailto:kathryn.kerns@bceengineers.com" target="_blank">kathryn.kerns@bceengineers.com</a>> wrote:<o:p></o:p></p></div></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Everyone, I may have asked this before, but has anybody run across a section of ASHRAE 90.1 or LEED describing the operation of a baseline furnace in a PSZ unit? Do we assume the heating modulates or does it stage? And if it stages, how many stages? I have been modeling baseline furnace heating as modulating since that is what naturally appears in eQuest, but I wonder. I know in reality that a lot of small furnace heaters cycle to maintain space heat. </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Also, I promised I would share results of my struggle to model dehumidification for a project in Georgia. I was sort of successful, I think. What I ended up doing was attaching 2 DOAS in series. The first DOAS had a cooling only heat pump and the second unit had heating only heat pump. The first unit handled the outside air and passed space/return air to the second DOAS. The second unit supplied space/return air to the terminal units. This way I got to define set points for the first DOAS cooling supply temperature (space/return temperature) and the second DOAS heating supply (space/return temperature). The amount of energy consumed and size of each unit was adjusted to approximate a horseshoe dehumidification unit. It seemed to work. </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p><p style='margin:0in;margin-bottom:.0001pt'><b><span style='font-family:"Arial","sans-serif";color:black'>Kathryn Kerns</span></b><o:p></o:p></p><p style='margin:0in;margin-bottom:.0001pt'><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Systems Specialist</span></b><o:p></o:p></p><p style='margin:0in;margin-bottom:.0001pt'><b><span style='font-variant:small-caps;color:teal'>BCE</span></b><b><span style='font-size:10.0pt;font-variant:small-caps;color:teal'> </span><span style='font-variant:small-caps;color:teal'>Engineers, Inc.</span></b><o:p></o:p></p><p style='margin:0in;margin-bottom:.0001pt'><b><span style='font-size:9.0pt;color:black'>| Ph: <a href="tel:253.922.0446" target="_blank">253.922.0446</a> | Fx: <a href="tel:253.922.0896" target="_blank">253.922.0896</a> |</span></b><span style='font-size:7.0pt;color:black'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:13.5pt;font-family:"Arial","sans-serif";color:black'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <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'>_______________________________________________<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" target="_blank">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><o:p></o:p></p></blockquote></div><p class=MsoNormal><span style='color:#888888'><br><br clear=all><br>-- <br>Carol Gardner PE</span><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><br>-- <br>Carol Gardner PE<o:p></o:p></p></div></body></html>