Abstract
Comfort predictions based on biological information were performed in office environments. Subjects worked in two environments; One is the office with a conventional air conditioning, and the other is with the radiational conditioning functioning all day and night. Activation of parasympathetic nerve and deactivation of sympathetic nerve, in which the subjects might feel a comfortable environment and expect improvement of intellectual productivity, were recorded when the subjects worked in the radiational conditioning. The activation of sympathetic nerve or parasympathetic nerve was estimated through analysis of electrocardiogram. This non-invasive method has a beneficial effect on the estimation of comfortable environment.
