Subjective and Objective Assessment of Office Performance and Heat Strain at Elevated Temperatures - The HESO-Study.

Runa Tabea Hellwig, Iris Noeske, Sabine Brasche, Hansjurgen Gebhardt, Inna Levchuk, Kersten Bux, Wolfgang Bischof

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

5 Citations (Scopus)


A study was carried out to investigate whether an elevated room temperature in a summer heat wave affects a subject’s mental status, self-assessed performance or impairs a subject’s mental performance. In a simulated office environment 20 subjects were exposed to different air temperature conditions: 23-26°C, repeated once, 29-32°C and 33-35°C during outside summer conditions. In the course of 4.25 h selective attention, verbal and numerical thinking did not change significantly neither with temperature nor time. Slight effects on performance were found for text correction. The willingness to exert effort and the feeling of being relaxed decreased significantly both with temperature and time. Drowsiness tended to increase with temperature and rose significantly with time. The feeling of being well-adjusted and self-assessed performance tended to decrease with increasing temperature. The mental and physical work load were perceived to be higher when the temperatures where higher. The results imply the subject’s ability to adjust their mental performance in relation to heat strain. A longer exposure time may lead to different results.
Original languageEnglish
Title of host publicationHealthy Buildings 2012. 10th International Conference : 8 -12 July 2012, Brisbane, Australia Brisbane: Queensland University of Technology, 2012
Number of pages6
Place of PublicationBrisbane
PublisherInternational Society of Indoor Air Quality and Climate
Publication date2012
Article number3D-9/ 7C-7
ISBN (Electronic)978-1-921897-40-5
Publication statusPublished - 2012
Externally publishedYes


  • Productivity
  • Office Building
  • Thermal comfort
  • Adaptation
  • Adaptive comfort
  • Temperature
  • occupant perception
  • occupational health and safety
  • summer
  • Overheating


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