Abstract
This paper examines the influence of work space enclosure, individual difference variables (sex, job type), and control over the thermal environment on employee perceptions and satisfaction with air quality. The study population consisted of 200 office workers on five different floors of a single building that used either under-floor mounted air distribution units or a standard HVAC system. The under-floor units permit individual control over volume and direction of airflow in the work space. Four aspects of control were examined: availability of control; perceptions of control; exercised control; and; importance of thermal comfort as a goal. Dependent measures of air quality included: perceptions of air freshness; temperature; seasonal variations in temperature and satisfaction with temperature. The combined effects of work station enclosure and employee control were examined by means of multiple regression equations in which sex and occupational status were controlled. The results indicate that when the effects of sex and job status are statistically controlled, personal control and enclosure are significant predictors of employee perceptions. In order of importance; exercised control, perceived control, the importance of air quality as a goal; physical enclosure, and; availability of control all significantly influence perceptions of thermal comfort and satisfaction.
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