<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Mateo:</DIV>
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<DIV>Hospitals in the United States come with very strict outdoor air requirements. So when you say you change the outdoor air requirement, it will not be a single number.</DIV>
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<DIV>ASHRAE 62.1 (2007 ??) describes what outdoor air requirements are needed for what spaces. That would be the best source.</DIV>
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<DIV>You also indicate you are changing wall thinckness (or is that insulation thickness). I have found changing wall insulation doesn't matter that much in energy savings. Changing window sizing and properties has a greater impact.</DIV>
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<DIV>I am sure some of my colleagues on this web site have much greater hospital experience and will share that with you.</DIV>
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<DIV>Just after we in the US get our first cups of coffee...<BR></DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Mateo Guadalfajara <mateo_mw@hotmail.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> equest-users@lists.onebuilding.org<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Mon, May 3, 2010 4:47:31 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users] Outdoor Air , Air flow ...<BR></FONT><BR>
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Hello I am revisining a project of a hospital and changing the insulation of the walls from 0,063 feet to 0,52feet I get a very low reduction in heating and cooling (1%) needs, so I have suppose that the ventilation and the infiltrations in the building are over seized.<BR>I have revise them and I have in the conditioned spaces 0,50 cfm/ft2 or Air Flow and 46,2 cfm/person. <BR> <BR>It´s that too much? What is it exactly outdoor air?<BR>I am eliminating the outdoor air from all the rooms because I think that outdoor air is the air that come from windows and infiltrations. <BR> <BR>Thanks for answering<BR> <BR> Mateo de Guadalfajara <BR> <A href="mailto:mateo_mw@hotmail.com" rel=nofollow target=_blank
ymailto="mailto:mateo_mw@hotmail.com">mateo_mw@hotmail.com</A><BR> Zaragoza, Spain University Student.<BR><BR>
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