Associations between type of ventilation and air flow rates in office buildings and the risk of SBS-symptoms among occupants

Abstract The association between type of ventilation and outdoor-air flow rates and Sick Building Syndrome (SBS) and SBS symptoms was studied in a cross-sectional questionnaire and field study comprising 160 office buildings, and 260–2649 respondents with case-controls as well as prevalence comparisons. Measured ventilation rates were higher than required by most building codes and consisted of fresh-air (outdoor-air) inflow of 17±14 L/p and 2.0±1.3 air changes/h. Increased risk of SBS and elevated prevalence of general SBS symptoms were associated with low outdoor-air flow rates, presence of copying machines in office rooms, and ventilation operating hours was less than 10 h/d. There was a suspected association between SBS and air humidification, recirculation of exhaust air at high outdoor-air flow rates but not at low outdoor-air flow rates, and with natural or mechanical exhaust ventilation systems. SBS was not associated with the presence of a rotary heat exchanger or with the supply air temperature higher than the room air temperature.

[1]  Mark J. Mendell,et al.  THE CALIFORNIA HEALTHY BUILDING STUDY, PHASE 1: A SUMMARY , 1993 .

[2]  David Faulkner,et al.  Air exchange effectiveness of conventional and task ventilation for offices , 1991 .

[3]  A. Smith,et al.  Consistent pattern of elevated symptoms in air-conditioned office buildings: a reanalysis of epidemiologic studies. , 1990, American journal of public health.

[4]  Jan Sundell,et al.  A Prevalence Study Of The Sick Building Syndrome (SBS) And Facial Skin Symptoms In Office Workers , 1993 .

[5]  B. V. Pedersen,et al.  Influence of personal characteristics, job-related factors and psychosocial factors on the sick building syndrome. Danish Indoor Climate Study Group. , 1989, Scandinavian journal of work, environment & health.

[6]  Simon Turner,et al.  An indoor air quality survey of twenty‐six (26) Swiss office buildings , 1990 .

[7]  Jan Sundell,et al.  Mass Transfer Of Contaminants In Rotary Enthalpy Exchangers , 1993 .

[8]  Jan Sundell,et al.  Volatile Organic Compounds in Ventilating Air in Buildings at Different Sampling Points in the Buildings and their Relationship with the Prevalence of Occupant Symptoms , 1993 .

[9]  Povl Ole Fanger,et al.  Air Pollution Sources in Offices and Assembly Halls, Quantified by the olf Unit , 1988 .

[10]  Alan Hedge,et al.  Work-related illness in offices: A proposed model of the “sick building syndrome” , 1989 .

[11]  C. Billings,et al.  Cure of a sick building: A case study , 1989 .

[12]  David Peter Wyon,et al.  Sick buildings and the experimental approach , 1992 .

[13]  T. Zweers,et al.  Sick leave due to work-related health complaints among office workers in The Netherlands. , 1990 .

[14]  P. Fanger.  Introduction of the olf and the decipol units to quantify air pollution perceived by humans indoors and outdoors , 1988 .

[15]  Bert Brunekreef,et al.  Health and Indoor Climate Complaints of 7043 office Workers in 61 Buildings in the Netherlands , 1992 .

[16]  P. Skov,et al.  Influence of indoor climate on the sick building syndrome in an office environment. The Danish Indoor Climate Study Group. , 1990, Scandinavian journal of work, environment & health.

[17]  Olli Seppänen,et al.  Mechanical Ventilation in Office Buildings and the Sick Building Syndrome. An Experimental and Epidemiological Study , 1991 .

[18]  Jan Sundell,et al.  Sick Building Syndrome (SBS) in Office Workers and Facial Skin Symptoms among VDT‐Workers in Relation to Building and Room Characteristics: Two Case‐Referent Studies , 1994 .