Abstract
Unvented combustion appliances discharge various contaminants indoors. In earlier studies concentration of CO, NO_x hydrocarbosn, aldehydes, and VOCs discharged from each of unvented combustion appliances was measured in a large scale chamber. The present study investigated the discharge of these substances and ammonia in a residential environment by performing the survey in residence.The results showed that aldehydes concentration of the unvented combustion appliances are in the range of 1.64 to 30.1 [μg/m^3], and a TVOC concentration maximum of 505[μg/m^3]The serious indoor air pollution is caused by use of the unvented combustion appliance.
