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Avoid overheating

Excessively high temperatures with a naturally ventilated DSF cavity will significantly increase the secondary transmitted energy and therefore the total solar gains (g-value) of the façade to the interior spaces. Especially at the top floors, overheating is very likely if proper amount of ventilation is not provided.

A parametric study accounting for different opening sizes (inlets and outlets), cavity depths, appropriate types of glazing and shading devices and cavity characteristic heights (ratio between maximum cavity height and depth) was used to inform the façade design to avoid excessively overheating the cavity.

Ventilation strategy

Absorbed and convected solar component

Reduced radiation exchange can increase the insulation

Concept of ventilation through vertical dampers

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