European Collaborative Action
Urban Air, Indoor Environment and Human Exposure
|Guidelines for ventilation requirements in buildings
These Guidelines recommend the ventilation required to
obtain a desired indoor air quality in a space. The first step is to decide
the air quality aimed for in the ventilated space. A certain air quality
is prescribed to avoid adverse health effects while a decision is required
on the level of perceived air quality aimed for in the ventilated space.
Three different comfort levels are suggested. The next step is to determine
the pollution load on the air caused by pollution sources in the space.
The total pollution load is found by adding the loads caused by the building
and by the occupants. The available outdoor air quality and the ventilation
effectiveness of the ventilated space are also considered. The ventilation
rate required to provide the desired indoor air quality is then calculated
based on the total pollution load, the available outdoor air quality and
the ventilation effectiveness. The ventilation rates required for health
and comfort are calculated separately and the highest value is used for
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