Subjective experiments on the effects of relative humidity and humidity ratio during summer season

Y. Chen, H. Tsutsumi, T. Akimoto, S. Tanabe, T. Takagi
health, humidity
Year:
2003
Bibliographic info:
Healthy Buildings 2003 - Proceedings 7th International Conference (7th-11th December 2003) - National University of Singapore - Vol. 3, pp 293-298, 9 Fig., 1 Tab., 10 Ref.

In order to clarify the effects on comfort and health of relative humidity and humidity ratio,subjective experiments were conducted in a climate chamber in Japan during the summer of2002. Fifteen subjects were exposed for 180 min, while being engaged in simulated officeworks and questionnaires. The experiments were conducted at a constant SET* (StandardNew Effective Temperature) with six different humidity conditions, namely [30%RH/6.13 g/kg],[37%RH/6.13 g/kg], [37%RH/7.45 g/kg], [45%RH/7.45 g/kg], [45%RH/8.97 g/kg],[55%RH/8.97 g/kg]. The highest skin moisture was observed under 8.97 g/kg conditions. Oralmucosa moisture under 6.13 g/kg conditions was lower than that of other conditions. Subjectsfelt drier under low humidity within their tolerance level. Though the effects of humidityconditions (37-55%RH) on performance were moderate, subjects complained more of beingfatigued under low humidity.

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