Influence of unsteady thermal state on productivity in office buildings

Abstract

Indoor air temperature has a significant effect on productivity of the employees in office buildings. It may reduce work performance and cause financial losses in a long term perspective. However, sudden variations of air temperature during the work day may have an impact on the work performance as well. The aim of this study was to assess the change of office work performance of the same individuals affected by unsteady air temperature. Laboratory tests were performed in the test chamber. Office work was simulated in the chamber with two workplaces and two persons at the time. 48 individuals of age 19 to 30 were divided into three groups and took participation in performing productivity tests. A case with the temperature rise from +22 to +26 °C as well as case with the temperature drop from +22 to +18 °C was analyzed. The same tests were performed with the placebo group with a steady indoor climate conditions (constant air temperature of +22 °C). Results of the study showed that overall accuracy of the execution of the tasks increased with the second fulfilment in the placebo group by 1,4 %. In case of the air temperature rise, performance reduced by 0,2 % and overall productivity improved by 4,1 % in case of air temperature drop.