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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">A 50,000 sf building we are looking at has electric DX cooling and electric heat VAV terminal boxes in the zones. The only gas use in this system is for a small pre-heat coil on the RTU and there is also an energy recovery ventilator. In
developing the Baseline model, <b>should we use System 5 (gas boiler) or go with System 6 (all electric)?</b><o:p></o:p></p>
<p class="MsoNormal"><br>
With gas, I know the default is to use Sys 5 but in this case the pre-heat is a very small part of the system so the “predominant” heating energy use is electric. The Baseline will still be modeled with the same gas pre-heater per Appendix G, either way.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks for your thoughts.<o:p></o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Century Gothic",sans-serif;color:#006E78">Jeff Ross-Bain, PE, LEED Fellow</span></b><b><span style="font-size:8.0pt;font-family:"Century Gothic",sans-serif;color:#006E78"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Century Gothic",sans-serif;color:#535053">President<o:p></o:p></span></p>
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</span><b><span style="font-size:7.5pt;font-family:"Century Gothic",sans-serif;color:#006E78"><a href="http://www.rbgb.com/">www.rbgb.com</a></span></b><span style="font-size:7.5pt;font-family:"Century Gothic",sans-serif;color:#535053"><br>
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</span><span style="font-size:7.5pt;font-family:"Century Gothic",sans-serif;color:#006E78">Build Green. Save Time. Save Money.<o:p></o:p></span></p>
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