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Effects of Changing Air Temperature at Different Sleep Stages on the Subjective Evaluation of Sleep Quality

Author

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  • Jack Ngarambe

    (Department of Architectural Engineer, Kyung Hee University, Yongin 17104, Korea)

  • Geun Young Yun

    (Department of Architectural Engineer, Kyung Hee University, Yongin 17104, Korea)

  • Kisup Lee

    (Air Purification Research Center, Digital Appliances Business, Samsung Electronics, Suwon 16671, Korea)

  • Yeona Hwang

    (Air Purification Research Center, Digital Appliances Business, Samsung Electronics, Suwon 16671, Korea)

Abstract

The thermal environment in bedrooms is important for high-quality sleep. Studies confirm that, even during sleep, the human body remains sensitive to the ambient air temperature. This study assesses how changing indoor air temperatures at different sleep stages affects the subjective evaluation of sleep quality. We compare reports from two identical sleeping environments with different thermal control systems: an IoT-based control system that adjusts the indoor air temperature according to the sleep stage and a fixed control system that maintains a constant temperature throughout the night. Ten subjects participated in the experiments and completed a questionnaire about their sleep quality. Our results show that, overall, the subjects experienced better sleep in the room with the IoT-based control system than in the one with a fixed thermal control. The mean differences in sleep satisfaction levels between the two sleeping environments were generally statistically significant in favor of the room with the IoT-based thermal control. Our results thus illustrate the suitability of using the IoT to control the air conditioning in bedrooms to provide improved sleep quality.

Suggested Citation

  • Jack Ngarambe & Geun Young Yun & Kisup Lee & Yeona Hwang, 2019. "Effects of Changing Air Temperature at Different Sleep Stages on the Subjective Evaluation of Sleep Quality," Sustainability, MDPI, vol. 11(5), pages 1-16, March.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:5:p:1417-:d:211812
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    References listed on IDEAS

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    1. Djongyang, Noël & Tchinda, René & Njomo, Donatien, 2010. "Thermal comfort: A review paper," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(9), pages 2626-2640, December.
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    Cited by:

    1. Muchun Li & Qi Cai & Can Li & Xingnan Wu & Tao Wang & Jian Xu & Zhicai Wu, 2022. "A Study in Bedroom Living Environment Preferences of the Urban Elderly in China," Sustainability, MDPI, vol. 14(20), pages 1-23, October.

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