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\par }\pard \ql \li0\ri-288\widctlpar\aspalpha\aspnum\faauto\adjustright\rin-288\lin0\itap0\pararsid13399715 {\insrsid13399715 Blower-Door-Test }{\insrsid1838889 2}{\insrsid13399715 \tab                   Herbst 2007
\par 
\par 
\par }{\insrsid1838889\charrsid1838889 Der Blower-Door-Test gliedert sich in drei Phasen. In der ersten und zweiten Phase baut der Messtechniker jeweils einen Unterdruck im Geb\'e4ude auf, das hei\'dft, die Luft wird aus dem Geb\'e4ude herausgesaugt. W\'e4
hrend dieser Phase wird die Geb\'e4udeh\'fclle nach undichten Stellen, so genannten  Leckagen abgesucht, an denen die  Luft ungehindert hereinstr\'f6mt. Gr\'f6\'dfere Fehlstellen lassen sich meist mit der Hand erf\'fchlen, f\'fc
r kleinere benutzt der Fachmann Rauchmaschinen oder Luftgeschwindigkeitsmesser. In der dritten Phase wird analog zur Unterdruckmessung ein \'dcberdruck erzeugt. In allen drei Phasen misst der Messtechniker die Druckdifferenz im Geb\'e4
ude. Er kann damit den Druckverlust errechnen und den zu erwartenden W\'e4rmeverlust ermitteln. Der genaue Ablauf der Messung ist in der DIN EN 13829 geregelt.}{\insrsid13399715\charrsid1838889 
\par }{\insrsid13399715 
\par }{\insrsid13399715 
\par Foto: Verband Privater Bauherren (VPB)/Regionalb\'fcro Hannover}{\insrsid8677199 
\par }}