The impact of dry indoor air on comfort and health in winter was investigated in a crossover intervention study in two floors of an office building in northern Sweden. The indoor air humidity (normally 10-20% RH) was raised to 23-24% RH, one floor at a time, using steam humidifiers. Questionnaires and objective (clinical) measurements were applied. The following effects of increased humidity were significant, though small: the air was evaluated as less dry (though still on the dry side of neutral), eyes smarted less (by 10% of full scale) eye irritation decreased (by 11%), symptoms of dry throat, mouth, lips and skin were reduced, and it was easier to concentrate. The results confirm similar laboratory findings in 5-hour exposures (Fang et al. 2003, reported at this conference) to 2-week field exposures, but as the effects observed were again small, they do not provide sufficient justification for installing humidifiers.
|Title of host publication||Proceedings of Healthy Buildings 2003|
|Place of Publication||National University of Singapore|
|Publication status||Published - 2003|
|Event||7th International Conference on Healthy Buildings 2003 - Singapore, Singapore|
Duration: 7 Dec 2003 → 11 Dec 2003
Conference number: 7
|Conference||7th International Conference on Healthy Buildings 2003|
|Period||07/12/2003 → 11/12/2003|
Lagercrantz, L. P., Wyon, D., Meyer, H. W., Prause, J. U., Fang, L., Clausen, G., & Sundell, J. (2003). Objective and Subjective Responses to Low Relative Humidity in an Office Intervention Study. In Proceedings of Healthy Buildings 2003 (pp. 163-168). Stallion Press.