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Ventilation and Relative Humidity in Swedish Buildings

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DOI: 10.4236/jep.2014.511102    2,863 Downloads   3,639 Views   Citations

ABSTRACT

An important factor for comfort ratio in the indoor environment and affecting human health and well-being is the relative humidity. Studies have shown that about 70% of the staff at Swedish offices, schools and kindergartens experiences that the air is too dry during the winter season. Studies show that the relative humidity in indoor environments influences the incidence of respiratory infections and allergies. Important factors for the air environment indoors is to limit the number of airborne particles, since these are conveyors of both bacteria and viruses, and to keep the humidity at a level above 40% and below 70%, making the survival of viruses and bacteria minimized. Measurement results show that there is significant difference in the relative humidity during the winter season between the mechanically ventilated buildings with relative humidity levels below 10% than in buildings with natural ventilation. An important issue is how human health is affected by during longer periods and during much of the day live in environments with low relative humidity. Several researchers have noted that the incidence of respiratory infections increase during the winter when people are exposed to long periods of low humidity indoors. This means that the consequences of low humidity in the indoor environment should be considered and evaluated in a completely different way than is done today.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Alsmo, T. and Alsmo, C. (2014) Ventilation and Relative Humidity in Swedish Buildings. Journal of Environmental Protection, 5, 1022-1036. doi: 10.4236/jep.2014.511102.

References

[1] Alsmo, T. and Alsmo C. (2013) A Study of Hygiene in Swedish Schools and Pre-Schools-Sources of Air Pollution. Journal of Environmental Protection, 4, 1349-1359.
[2] Arundel, A.V., Sterling, E.M., Biggin, J.H. and Sterling, T.D. (1986) Indirect Health Effects of Relative Humidity in Indoor Environments. Environmental Health Perspectives, 65, 351-356.
[3] Arbetsmiljoverket. The Swedish Work Environment Authority.
http://www.av.se/teman/temperatur_klimat/kyla/bedomning/
[4] Sveriges meteorologiska och hydrologiska institut. Sweden’s Meteorological and Hydrological Institute.
http://www.smhi.se/kunskapsbanken/meteorologi/luftfuktighet-1.3910
[5] Wikipedia
http://sv.wikipedia.org/wiki/Luftfuktighet
[6] Meyer, B. (1983) Indoor Air Quality. Addison-Wesley, Reading.
[7] McIntyre, D.A. (1978) Response to Atmospheric Humidity at Comfortable Air Temperature: A Comparison of Three Experiments. The Annals of Occupational Hygiene, 21, 177-190.
http://dx.doi.org/10.1093/annhyg/21.2.177
[8] Eng, W.G. (1979) Survey on Eye Comfort In Aircraft: 1. Flight Attendants. Aviation, Space, and Environmental Medicine, 50, 401-404.
[9] Strauss, R.H., McFadden, E.R., Ingram, R.H., Deal, E.C. and Jaeger, J. (1978) Influence of Heat and Humidity on the Airway Obstruction Induced by Exercise in Asthma. Journal of Clinical Investigation, 61, 433-440.
http://dx.doi.org/10.1172/JCI108954
[10] Lubart, J. (1962) The Common Cold and Humidity Imbalance. New York State Journal of Medicine, 62, 817-819.
[11] Lubart, J. (1979) Health Care Containment Cost. American Journal of Otolaryngology, 1, 81-83.
http://dx.doi.org/10.1016/S0196-0709(79)80011-3
[12] Zeterberg, J.M. (1973) A Review of Respiratory Virology and the Spread of Virulent and Possibly Antigenic Viruses via Air Conditioning Systems. Annals of Allergy, 31, 228-234.
[13] Sale, C.S. (1971) Humidification during the Cold Weather to Assist Perennial Allergic Rhinitis Patients. Annals of Allergy, 29, 356-357.
[14] Ingelstedt, S. (1956) Studies on the Conditioning of Air in the Respiratory Tract. Acta Oto-Laryngologica, Supplementu, 131, 1-80.
[15] Drettner, B., Falck, B. and Simon, H. (1977) Measurements of the Air Conditioning Capacity of the Nose during Normal and Pathological Conditions and Pharmacological Influence. Acta Oto-Laryngologica, 84, 266-277.
http://dx.doi.org/10.3109/00016487709123966
[16] Richards, J.H. (1974) Effect of Relative Humidity on the Theological Properties of Bronchial Mucus. American Review of Respiratory Disease, 109, 484-486.
[17] Buckland, E.E. and Tyrrell, D.A.J. (1962) Loss of Infectivity on Drying Various Viruses. Nature, 195, 1063-1064.
http://dx.doi.org/10.1038/1951063a0
[18] Moe, K. and Shirley, J.A. (1982) The Effect of Relative Humidity and Temperature on the Survival of Human Rotavirus in Faeces. Archives of Virology, 72, 179-186. http://dx.doi.org/10.1007/BF01348963
[19] Couch, R.B. (1981) Viruses and Indoor Air Pollution. Bulletin of the New York Academy of Medicine, 57, 907-921.
[20] Smith, E.B. (1983) Atmospheric Factors Affecting Transmission of Infections. The Practitioner, 227, 1667-1677.
[21] Fitzgerald, J.W. (1975) Approximation Formulas for the Equilibrium Size of an Aerosol Particle as a Function of Its Dry Size and Composition and the Relative Humidity. Journal of Applied Meteorology, 14, 1044-1049.
http://dx.doi.org/10.1175/1520-0450(1975)014<1044:AFFTES>2.0.CO;2
[22] Hanel, G. (1977) Humidity Effects on Gravitational Settling and Brownian Diffusion of Atmospheric Particles. Pure and Applied Geophysics, 115, 775-797.
http://dx.doi.org/10.1007/BF00881210
[23] Hatch, M.T. and Wolochow, H. (1969) Bacterial Survival: Consequences of the Airborne State. In: Dimmick, R.L. and Akers, A.B., Eds., An Introduction to Experimental Aero Biology, John Wiley and Sons, New York.
[24] LaForce, F.M. (1984) Airborne Infections and Modern Building Technology. In: Berglund, B., Lindvall, T. and Sundell, J., Eds., Proceedings of the 3rd International Conference on Indoor Air Quality and Climate 1: Recent Advances in the Health Sciences and Technology, Swedish Council for Building Research, Stockholm, 109-127.
[25] Wright, D.N., Bailey, G.D. and Hutch, M.J. (1968) Survival of Airborne Mycoplasma as Affected by Relative Humidity. Journal of Bacteriology, 95, 251-252.
[26] Flynn, D.D. and Goldberg, L.J. (1971) Effect of Relative Humidity on Aerosol Persistence of Streptococcus salivarius. Archives of Environmental Health, 23, 40-42.
http://dx.doi.org/10.1080/00039896.1971.10665952
[27] Anderson, J.D., Dark, E.A. and Pbto, S. (1968) The Effect of Aerosolization upon Survival and Potassium Retention by Various Bacteria. Microbiology, 52, 99-105.
http://dx.doi.org/10.1099/00221287-52-1-99
[28] Rosebury, T. (1947) Experimental Airborne Infection. Williams and Wilkins, Baltimore.
[29] Webb, S.J. (1959) Factors Affecting the Viability of Airborne Bacteria: 1. Bacteria Aerosolized from Distilled Water. Canadian Journal of Microbiology, 5, 649-669.
http://dx.doi.org/10.1139/m59-079
[30] Langmuir, A.D. (1980) Changing Concepts of Airborne Infection of Acute Contagious Diseases: A Reconsideration of Classic Epidemiologic Theories. Annals of the New York Academy of Sciences, 353, 35-44.
http://dx.doi.org/10.1111/j.1749-6632.1980.tb18903.x
[31] Moffet, H.L. (1980) Clinical Microbiology. J. B. Lippincott, Philadelphia.
[32] Gwaltney, J.M. (1980) Epidemiology of the Common Cold. Annals of the New York Academy of Sciences, 353, 54-60.
http://dx.doi.org/10.1111/j.1749-6632.1980.tb18905.x
[33] Knight, V. (1980) Viruses as Agents of Airborne Contamination. Annals of the New York Academy of Sciences, 353, 147-156.
http://dx.doi.org/10.1111/j.1749-6632.1980.tb18917.x
[34] Miller, W.S. and Artenstein, M.S. (1967) Aerosol Stability of Three Acute Respiratory Disease Viruses. Experimental Biology and Medicine, 125, 222-227.
http://dx.doi.org/10.3181/00379727-125-32054
[35] Davis, G.W, Griesemer, R.A., Shadduck, J.A. and Farrell, R.L. (1971) Effect of Relative Humidity on Dynamic Aerosols of Adenovirus 12. Journal of Applied Microbiology, 21, 676-679.
[36] Hemmes, J.H., Winkler, K.C. and Kool, S.M. (1960) Virus Survival as a Seasonal Factor in Influenza and Poliomyelitis. Nature, 188, 430-431.
http://dx.doi.org/10.1038/188430a0
[37] Harper, G.J. (1961) Airborne Micro-Organisms: Survival Tests with Four Viruses. Journal of Hygiene, 59, 479-486.
http://dx.doi.org/10.1017/S0022172400039176
[38] Schulman, J.L. and Kilbourne, E.D. (1962) Airborne Transmission of Influenza Virus Infection in Mice. Nature, 182, 1129-1130.
http://dx.doi.org/10.1038/1951129a0
[39] Lester, W. (1948) The Influence of Relative Humidity on the Infectivity of Air-Borne Influenza A Virus (PR8 Strain). Journal of Experimental Medicine, 88, 361-367.
http://dx.doi.org/10.1084/jem.88.3.361
[40] Schaffer, E.L., Soergel, M.E. and Straube, D.C. (1976) Survival of Airborne Influenza Virus: Effects of Propagating Host, Relative Humidity, and Composition of Spray Fluids. Archives of Virology, 51, 263-273.
http://dx.doi.org/10.1007/BF01317930
[41] Wraith, D.G., Cunnington, A.M. and Seymour, W.M. (1979) The Role and Allergenic Importance of Storage Mites in House Dust and Other Environments. Clinical & Experimental Allergy, 9, 545-561.
http://dx.doi.org/10.1111/j.1365-2222.1979.tb00478.x
[42] Korsgaard, J. (1982) Preventive Measures in House-Dust Allergy. American Review of Respiratory Disease, 125, 80-84.
[43] Arlian, L.G., Bernstein, I.L. and Gallagher, J.S. (1982) The Prevalence of House Dust Mites, Dermatophagoides spp, and Associated Environmental Conditions in Homes in Ohio. Journal of Allergy and Clinical Immunology, 69, 527-532.
http://dx.doi.org/10.1016/0091-6749(82)90178-6
[44] Murray, A.B. and Zuk, P. (1979) The Seasonal Variation in a Population of House Dust Mites in a North American City. Journal of Allergy and Clinical Immunology, 64, 266-269.
http://dx.doi.org/10.1016/0091-6749(79)90142-8
[45] Arlan, L.G., Brandt, R.L. and Bernstein, R. (1978) Occurrence of House Dust Mites, Dermatophagoides spp. during the Heating Season. Journal of Medical Entomology, 15, 35-42.
[46] Gravesen, S. (1979) Fungi as a Cause of Allergic Disease. Allergy, 34, 135-154.
http://dx.doi.org/10.1111/j.1398-9995.1979.tb01562.x
[47] English, P.T. (1980) Medical Mycology. Edward Arnold, London.
[48] NAS (National Academy of Sciences) (1981) Indoor Pollutants. National Academy Press, Washington DC.
[49] Andersen, I., Lundqvist, G.R. and Molhave, L. (1976) The Effect of Air Humidity and Sulphur Dioxide on Formaldehyde Emissions from a Construction Material (Chipboard). Holzforschung und Holzverwertung, 28, 120-121.
[50] IEC Beak Consultants Ltd. (1983) Indoor Air Quality, Cambridge Sealed Homes, a Report for Ontario Ministry of Municipal Affairs and Housing, IEC Beak, Mississauga, Ontario, October.
[51] Sheppard, D., Wong, W.S. and Uehora, C.F. (1981) Lower Threshold and Greater Bronchomotor Responsiveness of Asthmatic Subjects to Sulfur Dioxide. American Review of Respiratory Disease, 122, 873-878.
[52] Alaire, Y., Ulrich, C.E., Busey, W.M., Krumm, A.A. and MacFarland, H.N. (1972) Long-Term Continuous Exposures to Sulfur Dioxide in Cynomolgus Monkey. Archives of Environmental Health, 24, 115-128.
http://dx.doi.org/10.1080/00039896.1972.10666060
[53] US Environmental Protection Agency (1982) Air Quality Criteria for Oxides of Nitrogen. Environmental Criteria and Assessment Office, Research Triangle Park, NC.
[54] Mueller, F., Loeb, L. and Maper, W.H. (1973) Decomposition Rates of Ozone in Living Areas. Environmental Science & Technology, 7, 342.
http://dx.doi.org/10.1021/es60076a003
[55] Farrell, B.R., Kerr, H.D. and Kulle, T.J. (1979) Adaptation in Human Subjects to the Effects of Inhaled Ozone after Repeated Exposure. American Review of Respiratory Disease, 119, 725-730.
[56] Hope-Simpson, R.E. (1958) The Epidemiology of Non-Infectious Diseases. Royal Society of Health Journal, 78, 593.
[57] Gelperin, A. (1973) Humidification and Upper Respiratory Infection Incidence. Heating, Piping, Air Conditioning, 45, 3.
[58] Sale, C.S. (1972) Humidification to Reduce Respiratory Illnesses in Nursery School Children. Southern Medical Journal, 65, 882-885.
[59] Ritzel, G. (1966) Sozialmedizinsche Erhebungen zur Pathogenese und prophylare von Erkaltungskankheiten. Zeitschrift für Praventivmedizin, 11, 9-16.
http://dx.doi.org/10.1007/BF02031776
[60] NCHS (National Center for Health Statistics) (1975) Acute Conditions: Incidence and Associated Disability, United States July 1973-June 1974, National Center for Health Statistics, Rockville, Md., DHEW Publ. (HRA) 76-1529.
[61] Green, G.H. (1979) The Effect of Indoor Relative Humidity on Colds. ASHRAE Transactions, 85, 747-757.
[62] Lubart, J. (1962) The Common Cold and Humidity Imbalance. New York State Journal of Medicine, 62, 817-819.
[63] Lubart, J. (1979) Health Care Cost Containment. American Journal of Otolaryngology, 1, 81-83.
http://dx.doi.org/10.1016/S0196-0709(79)80011-3
[64] Zeterberg, J.M. (1973) A Review of Respiratory Virology and the Spread of Virulent and Possibly Antigenic Viruses via Air Conditioning Systems. Annals of Allergy, 31, 228-234.
[65] Arbetsmiljoverkets temasida “sjuka hus” The Swedish Work Environment Authorithy, Theme Page “Sick Buildings”.
http://www.av.se/teman/sjuka_hus/
[66] Rycroft, R.J.G. and Smith, W.D.L. (1980) Low Humidity Occupational Dermatoses. Contact Dermatitis, 6, 488-492.
http://dx.doi.org/10.1111/j.1600-0536.1980.tb05572.x
[67] Calnan, C.D. (1979) Cyanoacrylate Dermatitis. Contact Dermatitis, 5, 165-167.
http://dx.doi.org/10.1111/j.1600-0536.1979.tb04830.x
[68] White, I.R. and Rycroft, R.J.G. (1982) Low Humidity Occupational Dermatosis—An Epidemic. Contact Dermatitis, 8, 287-290.
http://dx.doi.org/10.1111/j.1600-0536.1982.tb04232.x

  
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