Effectiveness of a cool bed linen for thermal comfort and sleep quality in air-conditioned bedroom under hot-humid climate

Sheikh Ahmad Zaki, Mohamad Faizal Rosli, Hom Bahadur Rijal, Farah Nurhanis Hassan Sadzli, Aya Hagishima, Fitri Yakub

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Comfort temperature and sleep quality involving 20 participants were determined in two cases: Case A (arbitrary, controlled air-conditioner setting) and Case B (adjustment of 3 °C higher than the setting of Case A with cool bed linen). Data of indoor thermal comfort and electricity consumption were collected every night throughout the measurement period. Questionnaires on thermal comfort and sleep quality were distributed twice a night for a duration of three nights for each case; the first night was for respondents’ adaptation and the following two nights were for meas-urement. The sleep quality of the respondents was objectively measured using a commercially available activity tracker. Results found that most respondents were thermally comfortable in both cases, with 39% lower energy consumption reported for Case B compared to Case A. The thermal conditions of Case B were found to be more tolerable than those of Case A. Most respondents reported to have a calm and satisfied sleep for both cases. Comfort temperature and Sleep Efficiency Index (SEI) were found to be maintained in both cases.

Original languageEnglish
Article number9099
JournalSustainability (Switzerland)
Issue number16
Publication statusPublished - Aug 2 2021

All Science Journal Classification (ASJC) codes

  • Computer Science (miscellaneous)
  • Environmental Science (miscellaneous)
  • Geography, Planning and Development
  • Energy Engineering and Power Technology
  • Hardware and Architecture
  • Management, Monitoring, Policy and Law
  • Building and Construction
  • Computer Networks and Communications
  • Renewable Energy, Sustainability and the Environment


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