Ventilation: Local mean age of air -homogeneous emission techniques (NT VVS 118)

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  • Report #: NT VVS 118
  • Approved: November 1997
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The aim of this test method is to test ventilation performance in buildings, including premises which cannot be treated as a single well mixed zone.

The ventilation performance is tested by measuring the local mean ages of air, using homogeneous emission of tracer gas utilising passive tracer gas sources.


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