EnglishFrenchDutch
because          
"air is our first         
nutriment & medicine"         
(Hippocrate, 400BC)         
Print E-mail

 

Benefits of air ionisation in working areas

Maczinski (1971) studied the ionisation level in a 83m3 non aerated air conditioned room, where 4 persons were working and, among them, 2 smokers. The following table reports the results in terms of large PAIs and small NAIs.

 

 

Large PAIs

Small NAIs

8h to 8h45

11h to 11h45

14h to 14h15

7100

8600

8860

38

33

20

 

The drastic drop of NAIs and increase of large PAIs created migraine, nausea, sweating, eye & nose irritation, cough, lack of concentration, etc

 

The positive effect of air ionisation on aerocontaminant abatement has a direct benefit on human health.

 

Dr Robert (1991) reported that, in offices, air ionisation:

  • increases personal concentration
  • reduces personal absenteeism
  • reduces problems like migraine, fatigue, allergy
  • neutralizes the massive amount of positive ions produced by the computers

Dr Hawkins, from the University of Surrey in England (Hawkins, 1978), conducted extensive double blind occupational studies with air ionisers, involving more than 1000 persons. He demonstrated that a majority of the operators reported feeling more comfortable and alert when working in ionized air environment.

 

At the Norwich Union Insurance group headquarter, 8 NAIs generators were placed in the computer & data preparation section where people were complaining of sickness and headaches. After the test, 78% of incidents were reduced (Hawkins, 1990)

 

He also analysed the influence of air ionisation on some specific diseases/discomfort. The results were extremely encouraging:

 

Disease/Discomfort

Significant

improvement
%

No

improvement
%

Asthma

65

24

Hay fever

71

19

Mucus contamination

64

28

Nose contamination

67

26

Chronicle bronchitis

68

23

Lung contamination

64

26

Migraine

74

20

Chronicle headache

76

22

Psychological problems

79

13

Rheumatism

24

47

 

 

In a Swiss Textile mill, NAIs ionisers were placed in 2 rooms, each containing 22 employees. In one room, the ioniser was turned off. During a 6 month study, a total of 22 sick days were lost by employees working in the ionised room and 64 days in the other room. During a month long flu epidemic, the first group lost a total of 3 days and the other 40 days (Stark, 1971)

 

“L’Institut Supérieur du Travail” in France has also pointed out serious deficiency regarding the concept & maintenance of air conditioning systems. 80% are not regularly controlled and 20% are badly designed.

 

The Balhsen company (Hannover, D) has found out that, thanks to ionisers in their air conditioning systems, the micro-organism abatement was 87% after 30’, 90% after 1h and 97% after 100’.

 

A Swiss bank performed a study during 30 weeks: 309 persons worked in ionized air (4000 ions/cm3) and 362 in standard conditioned air. The ratio of sick persons was 1 to 16 !!! (reported in Robert, 1991)

 

Literature:

Hawkins L.H. Air ions and human performance 1978 Ergonomics, vol 21, 4, 273-278
Hawkins L.H. Biological significance of air ions 1985 Proc. IEE Colloquium on ions in the atmosphere, natural and man made. London, UK
Hawkins L.H. Air ion effects on human performance 2001

http://www.static-sol.com/library/

articles/air%20ion%20effects.htm

Maczynski B. Effect of the presence of man on the air ion density in an office room 1971 Int. J. of Biometeorology, 15 (1), p19-21
Robert Hervé Ionisation, Santé, Vitalité 1991 Ed. Artulen
 

© 2008 Air Quality Concept