Limiting criteria for human exposure to low humidity indoors

David Wyon, Lei Fang, H. Meyer, Jan Sundell, C. Weirsoee, N. SederbergOlsen, H. Tsutsumi, T. Agner, Povl Ole Fanger

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Thirty subjects (17 female) were exposed for 5 hours to clean air at 5%, 15%, 25% and 35% RH at 22 deg.C. Another 30 subjects (15 female) were similarly exposed to air polluted by carpet and linoleum at 18, 22 and 26 deg.C with humidity 2.4 g/kg dry air (=15% RH at 22 deg.C), and at 22 deg.C, 35% RH. The subjects performed simulated office work throughout each exposure. Building Related Symptom (BRS) intensity was reported on visual-analogue scales. Tests of eye, nose and skin function were applied. In these short exposures subjective discomfort, though significantly increased by low humidity, was very moderate even at 5% RH. However, tear film quality as indicated by the Mucous Ferning Test deteriorated significantly at RH22 deg.C, significantly more rapid blink rates were observed at 5% than at 35% RH, and skin became significantly more dry at 15% than at 35% RH.
Original languageEnglish
Title of host publicationProceedings of Indoor Air 2002
Publication date2002
Publication statusPublished - 2002
Event9th International Conference on Indoor Air Quality and Climate - Monterey, CA, United States
Duration: 30 Jun 20025 Jul 2002
Conference number: 9


Conference9th International Conference on Indoor Air Quality and Climate
Country/TerritoryUnited States
CityMonterey, CA
Internet address


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