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<p class="MsoNormal">All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can anyone share their experience with the modified baseline model HVAC description in ASHRAE 90.1 - 2007 and 2010? (copied below) ASHRAE 90.1-2004 did not require the baseline model for systems 5,6,7 and 8 to have separate HVAC systems
<b>per floor</b> and I’d like to hear how people have interpreted this and, if anyone can explain the reasoning for this.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For example, the proposed model of a 15 story office building might have 2 AHUs, one serving the east wing and one serving the west wing. For the baseline per ASHRAE 90.1-2007 or 2010, will these 2 AHUs be replaced with 15 separate VAV
units? Or can the 2 AHUs be kept as long as it satisfies the statement “Floors with identical thermal blocks can be grouped for modeling purposes”?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">ASHRAE 90.1 - 2004<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"TT12B7o00","sans-serif"">G3.1.1
</span><b><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">Baseline HVAC System Type and Description.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">HVAC systems in the
<i>baseline building design </i>shall be based<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">on usage, number of floors, conditioned floor area, and heating<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">source as specified in Table G3.1.1A and shall conform<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">with the system descriptions in Table G3.1.1B.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal">ASHRAE 90.1 – 2007 and 2010<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"TT12B7o00","sans-serif"">G3.1.1
</span><b><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">Baseline HVAC System Type and Description.<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">HVAC systems in the
<i>baseline building design </i>shall be based<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">on usage, number of floors, conditioned floor area, and heating<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">source as specified in Table G3.1.1A and shall conform<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">with the system descriptions in Table G3.1.1B. For systems 1,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">2, 3, and 4, each thermal block shall be modeled with its own<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">HVAC system. For systems 5, 6, 7, and 8, each floor shall be<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">modeled with a separate HVAC system. Floors with identical<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">thermal blocks can be grouped for modeling purposes.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">Linda Lam<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">212 219 2255 |
</span><span lang="DE"><a href="mailto:lam@transsolar.com"><span lang="EN-US" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:blue">lam@transsolar.com</span></a></span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">Transsolar Inc. | 134 Spring St. Suite 601 | New York, NY 10012<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">Transsolar Climate Engineering<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">Technical consulting for energy efficiency and environmental quality in buildings<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray">New York - Stuttgart - Munich - Paris<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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