54 fume hoods in three laboratory buildings in Norway were tested for containment using two tracer methods based on European and American standards, in addition to face velocity measurements. In the first method, an abridged version of Nordtest VVS 095, tracer gas was measured at one point in the sash opening, in front of a mannequin placed at the fume hood with a sash height of 30 cm. In the second method, based on ASHRAE 110-1995, tracer was measured in the breathing zone of the mannequin for a 67 cm sash height.
An isothermal air curtain for isolation of smoking areas in restaurants was designed, built and evaluated in a test facility using oil-smoke visualisation and tracer measurements. The test facility was a ventilation test room set up as a small restaurant, with tables, chairs, person simulators (cylindrical heat sources) and balanced mechanical ventilation. Fresh air was supplied in the non-smoking section of the room, exhaust air drawn from the smoking area, and the air curtain was attached to the ceiling between the two sections.
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