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<DIV>All,</DIV>
<DIV>I'm working on a LEED energy analysis for a small healthcare clinic project (~15K sqft). According to A90.1-2004 Appendix G, Table G3.1.1A, the baseline HVAC system for a nonresidential building with <=3 floors, <75K sqft, and fossil fuel heating should be a packaged single zone system with DX cooling and a gas-fired furnace for heating. This seems like a big departure from the baseline system types indicated in the ECB method. Is this a correct interpretation? If so, can anyone provide feedback as to why this change was made? It seems as though many buildings of this size would utilize a packaged rooftop VAV. Also, it potentially makes the number of systems necessary in the baseline building significantly high unless the thermal blocks are simplified in the proposed design model.</DIV>
<DIV>Thanks,</DIV>
<DIV>Bill Talbert, LEED AP<BR>Mechanical Engineer<BR>Phone: (608) 441-6677<BR><BR><BR><BR></DIV><PRE>
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