Effect of Temperature on Task Performance in Office Environments. Seppanen, O., Fisk, W., & Lei, Q. 2006.
Effect of Temperature on Task Performance in Office Environments [link]Paper  abstract   bibtex   
Indoor temperature is one of the fundamental characteristics of the indoor environment. It can be controlled with a degree of accuracy dependent on the building and its HVAC system. The indoor temperature affects several human responses, including thermal comfort, perceived air quality, sick building syndrome symptoms and performance at work. In this study, we focused on the effects of temperature on performance at office work. We included those studies that had used objective indicators of performance that are likely to be relevant in office type work, such as text processing, simple calculations (addition, multiplication), length of telephone customer service time, and total handling time per customer for call-center workers. We excluded data from studies of industrial work performance. We calculated from all studies the percentage of performance change per degree increase in temperature, and statistically analyzed measured work performance with temperature. The results show that performance increases with temperature up to 21-22 degrees C, and decreases with temperature above 23-24 degrees C. The highest productivity is at temperature of around 22 degrees C. For example, at the temperature of 30 degrees C the performance is only 91.1% of the maximum i.e. the reduction in performance is 8.9%
@misc{seppanen_effect_2006,
	title = {Effect of {Temperature} on {Task} {Performance} in {Office} {Environments}},
	url = {https://www.osti.gov/scitech/servlets/purl/903490},
	abstract = {Indoor temperature is one of the fundamental characteristics of the indoor environment. It can be controlled with a degree of accuracy dependent on the building and its HVAC system. The indoor temperature affects several human responses, including thermal comfort, perceived air quality, sick building syndrome symptoms and performance at work. In this study, we focused on the effects of temperature on performance at office work. We included those studies that had used objective indicators of performance that are likely to be relevant in office type work, such as text processing, simple calculations (addition, multiplication), length of telephone customer service time, and total handling time per customer for call-center workers. We excluded data from studies of industrial work performance. We calculated from all studies the percentage of performance change per degree increase in temperature, and statistically analyzed measured work performance with
temperature. The results show that performance increases with temperature up to 21-22 degrees C, and decreases with temperature above 23-24 degrees C. The highest productivity is at temperature of around 22 degrees C. For example, at the temperature of 30 degrees C the performance is only 91.1\% of the maximum i.e. the reduction in performance is 8.9\%},
	urldate = {2017-07-27},
	publisher = {Lawrence Berkeley National Laboratory},
	author = {Seppanen, O. and Fisk, W.J. and Lei, Q.},
	year = {2006},
	keywords = {CK, Damages, Geography: Revisit, Issue, Method: Empirical, Sector: Labor Supply and Productivity}
}

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