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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am modeling VRV system based on a “Energy Trust of Oregon, Inc.” guidance document (attached) posted by Mathew Larson of Colorado dated 12/12/2011. The document recommends using a PVVT system to simulate a VRV system. I used an air cooled PVVT system to model a VRV system. However, the unmet hours on the heating is very high. The cooling part is okay. Does anyone has experience on bringing down the unmet hours?<o:p></o:p></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><b><span style='font-size:14.0pt;font-family:"Bradley Hand ITC"'>Loi Ng<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>Mechanical Engineer</span><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>, </span><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>LEED<sup>®</sup> AP</span><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#0070C0'>Diversified Engineering, Inc.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#0070C0'>914 Silver Spring Avenue, Suite 208<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#0070C0'>Silver Spring, MD 20190<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#0070C0'>Tel: 301-565-2000 x 234<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#0070C0'>Fax 301-495-1563 <o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>