Definitions for "Natural Ventilation"
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).