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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If you have an unconditioned attic space not functioning as a plenum, is it correct to model the roof and ceiling as one layer? That is, can you assume all heat gain / loss through the roof is also transmitted to / from the space? I would assume not since air is an insulator, however treating the ceiling as a partition & guessing the attic temperatures at outside design extremes is too much of a wild guess in my opinion.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any comments on this would be appreciated. <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>Luke<o:p></o:p></p><p class=MsoNormal>512-744-4437<o:p></o:p></p><p class=MsoNormal>EEA Consulting Engineers<o:p></o:p></p><p class=MsoNormal>Austin, TX<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div>
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