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Open AccessArticle

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

1
Department of Architectural Engineer, Kyung Hee University, Yongin 17104, Korea
2
Air Purification Research Center, Digital Appliances Business, Samsung Electronics, Suwon 16671, Korea
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(5), 1417; https://doi.org/10.3390/su11051417
Received: 31 January 2019 / Revised: 1 March 2019 / Accepted: 3 March 2019 / Published: 7 March 2019
(This article belongs to the Special Issue The Deployment of IoT in Smart Buildings)
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. View Full-Text
Keywords: indoor environment; sleep quality; thermal environment; energy evaluation indoor environment; sleep quality; thermal environment; energy evaluation
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MDPI and ACS Style

Ngarambe, J.; Yun, G.Y.; Lee, K.; Hwang, Y. Effects of Changing Air Temperature at Different Sleep Stages on the Subjective Evaluation of Sleep Quality. Sustainability 2019, 11, 1417.

AMA Style

Ngarambe J, Yun GY, Lee K, Hwang Y. Effects of Changing Air Temperature at Different Sleep Stages on the Subjective Evaluation of Sleep Quality. Sustainability. 2019; 11(5):1417.

Chicago/Turabian Style

Ngarambe, Jack; Yun, Geun Y.; Lee, Kisup; Hwang, Yeona. 2019. "Effects of Changing Air Temperature at Different Sleep Stages on the Subjective Evaluation of Sleep Quality" Sustainability 11, no. 5: 1417.

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