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NATURAL VENTILATION SYSTEM - Coggle Diagram
NATURAL VENTILATION SYSTEM
DEFINITION
Is an economic means of providing air changes in a building.
Uses components integral with construction such as air-brick and louvers or openable windows.
sources
Wind effect / pressure
Stack effect / pressure
Combine (wind and stack effect / pressure)
Wind effect / pressure
Air moves from high pressure zones to low pressure zomes
High level of wind speed will show higher differences in wind pressure
Three-way of wind effect
i. Window
ii. Roof
iii. Wall
Stack effect / pressure
Is an application of converted air currents.
Cool air is encouraged to enter a building at low level.
Warmed by the occupancy, lighting, machinery and purposely located heat emitters.
Very effective in tall office-type buildings and shopping mall.
Combine
Happen when the wind is blowing strongly towards the opening stack.
This will cause the air sucked out of the interior space.
Air on the lower level will be replaced with fresh air from the outside the building.