Impact of moving to houses with high thermal insulation performance on sleep quality in winter

Wataru Umishio, Toshiharu Ikaga, Chika Ohashi

Research output: Contribution to journalArticle


This study aimed to clarify the impact of indoor thermal environment on sleep quality. Follow-up investigations on sleep quality (sleep efficiency, amount of deep sleep, sleep latency, and number of nighttime awakenings) and indoor temperature were conducted in winter (2014-2016) before and after moving to houses with high thermal insulation performance. Multiple linear regression analysis showed that sleep efficiency increased by 0.73% per 1 °C increase in indoor temperature during sleep. Increased indoor temperature also improved the number of nighttime awakenings.

Original languageEnglish
Pages (from-to)513-523
Number of pages11
JournalJournal of Environmental Engineering (Japan)
Issue number736
Publication statusPublished - 2017 Jun 1



  • Field survey
  • Follow-up investigation
  • House with high thermal insulation performance
  • Indoor temperature
  • Moving
  • Sleep quality

ASJC Scopus subject areas

  • Environmental Engineering

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