Development of ventilation design tool utilising expert system.

 This study is aimed to spread the intelligent design tool of ventilation in buildings and to improve indoor air quality (IAQ) in rooms. This paper describes two prototypes for diagnosing IAQ and ventilation calculation in rooms, by utilizing the technology of artificial intelligence, such as ES (Expert System), in which the data concerning ventilation design are summarized and the knowledge is presented in the form of production rule. Diagnosis system calculates up to eleven rooms of typical residential house in Japan and shows the capability of predicting the IAQ level of house with given ventilation rate and various using patterns. Also the ventilation calculation system gives an example of calculated minimum required ventilation rate with given pollutant generation rate and allowed pollutant concentration.