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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='color:#1F497D'>Review the section “Determination of Principal Heating Source” in the EE4 modelling guide. Essentially you should use the fuel source with the highest energy source adjustment factor which contributes at least 10% to the total heating capacity of each zone (including both terminal and system capacity). Since electricity has a higher ESAF than natural gas, if your electric reheat contributes at least 10%, then the principle source will be electric.<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 heating source is entered at the zone level.<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'>Kyle<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 #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"'> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Alex Blue<br><b>Sent:</b> Monday, May 30, 2011 11:17 AM<br><b>To:</b> bldg-sim@lists.onebuilding.org<br><b>Subject:</b> [Bldg-sim] EE4 heating source<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-CA>I am using EE4 to model an office building with natural gas RTU’s but electric reheats at the zone level. The reference building is only using natural gas for heating, rather than gas + electricity as in the proposed design. I’m getting very nice energy savings overall, but since my electricity use for the proposed case is actually higher than that of the reference, the cost has not gone down much at all (electricity is a lot more expensive here than natural gas.)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA>Is there any way to get EE4 to model the electric zone reheat capacity in its reference case? <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA>I have the RTU’s defined with electric zone reheat coils. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA>Thanks!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA>Alex Blue, EIT<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA>P.S. I’m new to the list, so hi! Nice to meet you all.<o:p></o:p></span></p></div></body></html>