Types of Natural Ventilation

Single-Sided Ventilation – Figure 1

The windows can only be opened on one side of the room. The amount of fresh air coming into the room is limited by single-sided ventilation.

Cross Ventilation – Figure 2

Windows in two or more façades can create cross-ventilation in the room. The ventilation is powered primarily by wind, which creates differences in air pressure on the facades in which the vents are located.

Stack Ventilation – Figure 3

Stack Ventilation occurs when there is a height difference between windows – i.e. between façade and roof windows. This type of ventilation is primarily driven by warm air rising to the top whereby it creates a pressure difference which drives the ventilation.

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