Introduction	Overcoming technical barriers to low-energy natural ventilation in office type buildings in moderate and cold climates.
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A common barrier when adopting natural ventilation in buildings located in urban environments is the potential exposure to external pollutants. Whilst mechanical ventilation systems can draw air through cleaning filters the driving pressures associated with naturally ventilated buildings are too low.
A strategy suitable for naturally ventilated buildings includes, identifying sources of pollution surrounding buildings and positioning air inlet devices in a sensible way.
The interactive design tool identifies all urban sources of pollution and indicates how different ventilation approaches will determine the type of pollution control features required within air inlets. Since size of air inlets in relation to ventilation performance is also an important issue, design tools are attached that calculate appropriate opening areas.