Natural Ventilation – The effects of Crosswind and Buoyancy

Replacement of indoor air with fresh outdoor air

The advantages of buoyant ventilation are becoming more apparent in commercial and industrial buildings every day. To enhance airflow, this sort of natural ventilation, also known as stack-effect ventilation, relies on temperature differential between the inside and exterior of the building. The interior can be much cooler and more comfortable by developing ventilation systems to take advantage of the buoyancy effect. The positioning of exhaust ventilators and intake louvres in a building can have a huge impact on air flow and temperature.


Basics of Ventilation


What is Natural Ventilation?


The use of natural forces to push airflow through a place is known as natural ventilation. As we understand the three basic objectives of ventilation are to improve indoor air quality, reduce energy consumption, and achieve maximum thermal comfort inside the space. Wind and buoyancy are two natural forces that can be employed to propel air through a building, resulting in two basic natural ventilation strategies: cross ventilation and buoyancy/stack ventilation.



What is
Cross Ventilation?


The wind produces a positive pressure on the façade as it hits the windward side. A zone of decreased pressure will be generated when it flows away from the leeward façade. Because of the pressure difference between the openings, air will be driven through the building if windows are open on both the windward and leeward sides.



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