Ventilation and the Air Ion Effect in the Indoor Building Environments: Impact on Human Health and Wellbeing

Ions are particles of air that have either a positive or negative electrical charge. In natural environments they are produced to maintain a healthy ratio but in an artificial indoor environment of air conditioning, electrical equipment, fluorescent lighting and even synthetic clothing the balance can be seriously affected. Each re circulation of air through the air conditioning system reduces the concentration of negative ions. Other factors having a major influence on air ion indoor levels are static electricity, smoke and dust contamination, and a high concentration of people. It appears from numerous studies and observations that the atmosphere in which we live and work makes up to three quarter of individuals to complain of discomfort within their indoor work room environment. The concentration of negative ions appears to be one of the major atmospheric factors responsible for this problem.