Workers' awareness and indoor environmental quality in power-saving offices

Sayana Tsushima*, Shin Ichi Tanabe, Naoe Nishihara, Masaya Hiraoka, Shin Ichi Hiromoto, Hideharu Komoda, Seiichi Tabuchi

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)


The Great East Japan Earthquake on March 11, 2011 caused enormous damage to infrastructure and lead to a 15% peak-power reduction in and around Tokyo. The purpose of this study is to investigate changes in indoor environmental quality (IEQ) and subjective evaluations of IEQ. We conducted continuous field surveys and questionnaire surveys in five power-saving office buildings in the summers of 2011-2013. The results indicate that the thermal environment recovered to pre-quake levels after 2012; whereas, considering the lighting environment, desk level illuminance was greatly decreased from 750 lux (pre-quake) to around 500 lux (post-quake). Indoor air quality didn't change significantly. Nearly all of the workers are satisfied with IEQ today, but this differed with the workers' gender, age, awareness of saving electricity, and work satisfaction. In particular, differences in workers' awareness had a profound effect on their satisfaction with IEQ. This indicates that workers who were supportive of saving electricity experienced and reported greater satisfaction with IEQ.

Original languageEnglish
Number of pages8
Publication statusPublished - 2014 Jan 1
Event13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014 - Hong Kong, Hong Kong
Duration: 2014 Jul 72014 Jul 12


Conference13th International Conference on Indoor Air Quality and Climate, Indoor Air 2014
Country/TerritoryHong Kong
CityHong Kong


  • Field survey
  • Indoor environment
  • Power-saving office
  • Productivity
  • Workers' consciousness

ASJC Scopus subject areas

  • Pollution
  • Building and Construction
  • Health, Toxicology and Mutagenesis
  • Computer Science Applications


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