The positioning of tracer gas sampling points in large enclosures.

The measurement techniques used to obtain ventilation effectiveness parameters require the infection of a tracer gas followed by the sampling of air at a number of points in the space. However, it is physically difficult to sample the air at a

Annex 26: Energy efficient ventilation of large enclosures. What designers really want to know about ventilation of large enclosures.

The specialists of IEA BCS Annex 26 have a clear picture of designer needs. The project objectives have not changes, but emphasis will now be place on the most relevant problems related to air motion, temperature distribution, and energy use. The development of viable solutions by expert teams from twelve countries is primarily based on investigations in existing case-study buildings. Researchers have started to demonstrate advanced experimental and numerical methods at these large enclosures ranging from atria to industrial halls.

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