Abstract
The purpose of this paper is to investigate the influence of the environmental factors upon the concentration of formaldehyde using small chambers and to develop a prediction method of indoor air quality in houses. The results of the measured emission rates in the small chambers are asfollows. 1. The emission rate increases as temperature rises and its influence is larger than those of the other factors: the humidity, the ventilation rate, the concentration and the sink effect. 2. The emission process influences upon the emission rates and the process is influenced by these factors. 3. The characteristics of the emission rates influenced by these factors obtained from the experiments using the small chambers meet the characteristics of the calculated values using the proposed simple equations.
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