Circulation of air without the assistance of a fan or other mechanical device. Naturalization Act of receiving the rights and privileges of a citizen including property rights.
Movement of air into and out of a building through intentional openings, such as windows, and vents. (Greenfield, 1987, p. 214)
The movement of air into and out of a home through random holes and cracks, and open windows and doors. The air movement is caused by wind and by temperature differences (which drives the stack effect).
Ventilation using only natural air movement, without fans or other mechanical devices.
Ventilation of a mine without the aid of fans or furnaces.
The design and placement of the building to allow adequate ventilation by controlling wind blowing against the building.
Making use of natural forms of temperature regulation, and air replacement to reduce the use of polluting climate control devices and to improve building air quality.
The movement of air into and out of a space through intentionally provided openings, such as windows and doors, or through nonpowered ventilators or by infiltration.
A ventilation system that runs without the use of electrical energy or fossil fuels. It uses passive solar design principles to block the summer sun entry and have windows placed to catch cooling breezes and therefore maximise cross-ventilation in summer.
Air circulation is provided by opening barn doors or windows and allowing the wind to draw through the barn.
A ventilation system utilizing ventilators installed in openings in the attic and properly positioned to take advantage of natural air flow to draw hot summer or moist winter air out and replace it with fresh outside air.
Ventilation that is created by the differences in the distribution of air pressures around a building. Air moves from areas of high pressure to areas of low pressure with gravity and wind pressure affecting the airflow. The placement and control of doors and windows alters natural ventilation patterns.
Natural ventilation is the process of supplying and removing air through an indoor space by natural means. There are two types of natural ventilation occurring in buildings: wind driven ventilation and stack ventilation. The pressures generated by buoyancy, also known as 'the stack effect', are quite low (typical values: 0.3 Pa to 3 Pa) while wind pressures are usually far greater (~1 Pa to 35 Pa).
