<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Arianna,<div class=""><br class=""></div><div class="">your description is slightly uninformative. You have a model in which you increase e.g. thickness of insulation? That should be noticeable in the results, what are the areas, changes in thickness, building size etc? You also have an air flow network and decrease e.g. crack dimensions? This, also, should lead to noticeable changes in the results (ach-values). What is the ach before and after the changes? How are leakages distributed across the building envelope?</div><div class=""><br class=""></div><div class="">What is the unexpectedness of your results?</div><div class=""><br class=""></div><div class="">Best</div><div class="">Achim</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 17 Jun 2015, at 17:35, Arianna Sdei <<a href="mailto:A.Sdei2@brighton.ac.uk" class="">A.Sdei2@brighton.ac.uk</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; direction: ltr; font-family: Tahoma; font-size: 10pt;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear All,</div><p style="margin-top: 0px; margin-bottom: 0px;" class=""> </p><div style="margin-top: 0px; margin-bottom: 0px;" class="">I am trying to increase the insulation and air tightness of a house to see the effects that these two parameters have on the heating and cooling loads. However, when I update the construction and network files and rerun the simulation I get some unespected results. The insulation and air tightness doesn't seem to make much difference. Do you know why this could be the case?</div><p style="margin-top: 0px; margin-bottom: 0px;" class=""> </p><div style="margin-top: 0px; margin-bottom: 0px;" class="">thank you,</div><p style="margin-top: 0px; margin-bottom: 0px;" class=""> </p><div style="margin-top: 0px; margin-bottom: 0px;" class="">Arianna</div></div><br clear="both" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; 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