Analysis on the grey classification to indoor air quality

Indoor air quality is one of the main factors, which affect indoor environment. Through analyzing indoor air quality (IAQ), 9 main factors have been established in this paper, such as temperature, wind speed and relative humidity, and so on. By the adaptive degree of humans physiology and psychology to indoor environment, IAQ is partitioned into 3 grades, that is comfortable, rather comfortable and uncomfortable. By above 3 grades, the limitation scopes of every grade of all factors are given, accordingly. With the favorable assessment function, the grey classification theory has been utilized to establish the assessment model of indoor air quality in this paper. This establishes the basic theory for reflecting and analyzing and comparing of indoor air quality more impersonal, exact and scientific, and this will provide references and standards for improving the indoor environment, too.