Circadian and Circannual Variations in the Evaluation of Thermal Comfort in a Constant Climate

Abstract

Workers in a controlled environment department for the maintenance and repair of electronic instruments, machines and 'nic' communications (elec tronic switchboards) were balloted with the object of revealing their circadian and circannual variations in thermoregulation. Twenty-two employees were asked every hour during a morning, an evening, and a night shift to rate their thermal comfort according to a linear scale. The constant temperature envi ronment was considered to be relatively too cold in the morning and relatively too warm in the evening. In the summer, the workers felt that they were rela tively too cold and in the winter-time relatively too warm.