Natural ventilation is the exchange of indoor and outdoor air without mechanical systems like fans or air conditioners. It relies on wind and thermal buoyancy to move air through openings such as windows, doors, and vents. This approach supports energy efficiency, indoor air quality, and occupant comfort, and is often combined with mechanical ventilation in mixed-mode designs.
/ˈnætʃərəl ˌvɛntɪˈleɪʃən/
Natural ventilation is the exchange of indoor and outdoor air without mechanical systems like fans or air conditioners. It relies on wind and thermal buoyancy to move air through openings such as windows, doors, and vents. This approach supports energy efficiency, indoor air quality, and occupant comfort, and is often combined with mechanical ventilation in mixed-mode designs.
What powers natural ventilation?
Wind pressure and temperature-driven buoyancy move air through the building.
Source: The Cooling Company
Wind and stack effect move fresh air naturally.
Green buildings use window placement, vents, and building orientation to maximize natural airflow and reduce reliance on mechanical systems.
In climates with large temperature swings, use mixed-mode ventilation to combine natural airflow with mechanical support when needed.
“In climates with large temperature swings, use mixed-mode ventilation to combine natural airflow with mechanical support when needed.”
Well-ventilated buildings can reduce airborne pathogen concentration indoors.
Is natural ventilation enough on its own?
It depends on climate and building design. Many buildings use mixed-mode systems for year-round comfort.
Does natural ventilation improve indoor air quality?
Yes. It can dilute indoor pollutants by bringing in outdoor air when conditions allow.
What is the stack effect?
It is the natural rise of warm air that draws in cooler air from lower openings.
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