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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Another method wd be to manipulate the infiltration values which are based on building pressure differentials ie wind affected. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thank you, Sincerely,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Michael J. McArdle , P.E.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Buildings Engineer II, Project Manager <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>State of Vermont, <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Buildings and General Services (BGS)<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>2 Governor Aiken Avenue<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Montpelier, Vt. 05633<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Office: 802-828-5650; cell: 802-272-4828<o:p></o:p></span></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Bruce Easterbrook<br><b>Sent:</b> Friday, April 15, 2011 5:02 PM<br><b>To:</b> Rimes, Christie<br><b>Cc:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] Natural Ventilation Only<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:13.5pt'>Building codes and ASHRAE 62.1 which most codes reference requires the outside air to be based on building square footage and the number of people in the building. See the app G economizer discussion currently going on. Your design needs to guarantee your system can deliver the fresh air required and not depend on whether the wind blows or not. One thing you might investigate would be to use exhaust fans to meet this minimum flow. Also, some codes allow for no mechanical ventilation if there is an operable window of a certain size in the room but this only works for the perimeter of a building. eQuest is used to model mechanical systems, I'm not sure how well it would work on passive systems. From what I have read on discussions on this list it doesn't totally mimic the stack effect either which would probably be critical in a passive system.<br>Bruce Easterbrook P.Eng.<br>Abode Engineering<br></span><br>On 15/04/2011 03:06 PM, Rimes, Christie wrote: <o:p></o:p></p><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I wanted to create a model in eQuest that only had natural ventilation using the S-G method and no mechanical system. Is this possible?<o:p></o:p></p><p class=MsoNormal>I have come up with the following problems:<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in'>I have used a PSZ unit and have 0 cooling capacity, no ventilation requirements and not installed heating – however I am still getting cooling and fan energy<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in'>If I turn off the fans then the unmet load hours are not calculated as they depend on when the fans are scheduled<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in'>If I use a heating only system, natural ventilation inputs are not allowed<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in'>I don’t want to just use an economizer for natural ventilation as I want the outside air to be dependent on the wind speeds and not forced with fans. <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Any thoughts?<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-family:"Arial","sans-serif"'>Christie Rimes, LEED BD+C</span></b><o:p></o:p></p><p class=MsoNormal><b><i><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#66737D'>Designer</span></i></b><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#333399'>WSP</span></b><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'> ▪ FLACK + KURTZ</span></b><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#66737D'>405 Howard Street, Suite 500</span></b><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#66737D'>San Francisco, CA 94105</span></b><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#66737D'>Direct: 415.402.2727 | Main: 415.398.3833</span></b><o:p></o:p></p><p class=MsoNormal><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif"'><a href="http://www.wspfk.com/" title="http://www.wspfk.com/">www.wspfk.com</a></span><o:p></o:p></p><p class=MsoNormal><span lang=EN-GB style='font-size:8.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:green'>Ensuring that today’s built environment preserves</span></b><b><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:navy'> </span></b><b><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:green'>the natural environment in which we all live.</span></b><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span></b><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>We are WSP.</span></b><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'> </span></b><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>United by our difference.</span></b><o:p></o:p></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'> </span></b><o:p></o:p></p><p class=MsoNormal><span lang=EN-GB style='font-size:9.0pt;font-family:"Arial","sans-serif";color:gray'>WSP is one of the world’s fastest-growing design, engineering and management consultancies. 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