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</o:shapelayout></xml><![endif]--></head><body lang=PT-BR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>I am simulating (EnergyPlus 6) a 200+ zone building with 116 conditioned zones, with CO2 controlled external air using the IAQP procedure with the needed objects and an external 400 CO2ppm and internal limits from 400 to 1000, apparently it does model the mechanical ventilation but, when I look on the variables output I get CO2 concentrations as low as 90, frequently around 200.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>How can I get contaminant concentrations lower than than of the outside air (without an internal CO2 sink) in these occupied conditioned zones? Is there any known issues or recommendations for this air contaminant balance procedure?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks a lot for the attention,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellpadding=0 width=330 style='width:247.5pt'><tr><td valign=top style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='font-size:12.0pt;color:#1F497D;mso-fareast-language:PT-BR'><img width=121 height=91 id="Imagem_x0020_1" src="cid:image001.png@01CD796B.E1509A70" alt="Descrição: Descrição: Descrição: Descrição: cid:image001.png@01CC81F3.24A80950"></span><span style='font-size:12.0pt;color:#1F497D;mso-fareast-language:PT-BR'><o:p></o:p></span></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal align=right style='text-align:right'><b><span style='font-size:10.5pt;font-family:"Arial Narrow","sans-serif";color:#054CB4;mso-fareast-language:PT-BR'>Leandro M Biondo</span></b><span style='font-size:10.5pt;font-family:"Arial Narrow","sans-serif";color:#1F497D;mso-fareast-language:PT-BR'><br>Energy Efficiency Consultant<o:p></o:p></span></p><p class=MsoNormal align=right style='text-align:right'><span style='font-size:10.5pt;font-family:"Arial Narrow","sans-serif";color:#1F497D;mso-fareast-language:PT-BR'>Meteorologista<br></span><span style='font-size:8.5pt;font-family:"Arial Narrow","sans-serif";color:#1F497D;mso-fareast-language:PT-BR'>Rua Álvaro Rodrigues, 182 - Cj. 153<br>Brooklin - São Paulo - CEP 04582-000<br>tel: (11) 2149 0300 Ram.352/cel: (11) 6436 3510<br><b><a href="http://www.cte.com.br/"><span style='color:#054CB4'>http://www.cte.com.br</span></a></b> </span><span style='font-size:10.5pt;font-family:"Arial Narrow","sans-serif";color:#1F497D;mso-fareast-language:PT-BR'><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='mso-fareast-language:PT-BR'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:PT-BR'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:PT-BR'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:11.5pt;font-family:Times-Bold;color:#1F497D;mso-fareast-language:PT-BR'>Aviso Legal<o:p></o:p></span></b></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:11.5pt;font-family:Times-Roman;color:black;mso-fareast-language:PT-BR'>Esta mensagem pode conter informações confidenciais e/ou privilegiadas. Se você não<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:11.5pt;font-family:Times-Roman;color:black;mso-fareast-language:PT-BR'>for o destinatário ou a pessoa autorizada a receber esta mensagem, não deve usar, copiar<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:11.5pt;font-family:Times-Roman;color:black;mso-fareast-language:PT-BR'>ou divulgar as informações nela contida ou tomar qualquer ação baseada nessas<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.5pt;font-family:Times-Roman;color:black;mso-fareast-language:PT-BR'>informações. Este ambiente está sujeito a monitoramento.</span><span style='mso-fareast-language:PT-BR'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>