Natural ventilation, as opposed to forced ventilation that is based on the fan, relies on the wind's natural force and buoyancy to transport fresh air to buildings. Fresh air is needed within buildings to reduce smells, supply oxygen to the respiratory system, and also increase comfort in thermal temperatures. Continue reading to know natural ventilation in buildings ("In Spanish "ventilacin natural en edificios")
With air velocity of at least 160 feet per second (fpm) and above, the perception of the temperature inside can be decreased by up to 5 degrees.
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But, unlike air conditioning natural ventilation is not effective at reducing the humidity level of the air that is incoming. This puts a limitation on the effectiveness of humid environments by natural vents.
Natural Ventilation Effects
Wind can blow air through the openings within the walls on the side facing the wind and then draw air out of the openings on the leeward-facing side as well as the roof.
The temperature differences between the warm air inside and the cool air outside could make the air in your room expand, exit through the ceiling or the ridge, and enter through smaller openings within the wall. In the same way, buoyancy due to variations in humidity could enable a column of dense, evaporatively chilled air to provide the space and allow cooler, more humid air to exit at the top.