Sleep quality and air conditioner use

Tsuzuki, Kazuyo; Morito, Naomi; Nishimiya, Hajime

doi:10.1186/2046-7648-4-s1-a129

Cited by 1 publication

(3 citation statements)

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“…Although the ministry of energy, trade, and industry of Japan recommends an indoor temperature of 20 • C in winter [41], participants still used ACs or heaters while sleeping at night. As natives, the Japanese usually use AC for only a short period before and after sleeping and not continuously while sleeping [32,42]. A previous study on young Japanese in Tsukuba, Japan, for 6 months in one year (2-month interval: February, April, June, August, October, and December) reported that the ambient temperature before going to sleep in December (winter) is 14.5 • C [42] and average bedroom temperature is 10 • C for old persons during winter [32].…”

Section: Discussionmentioning

confidence: 99%

“…As natives, the Japanese usually use AC for only a short period before and after sleeping and not continuously while sleeping [32,42]. A previous study on young Japanese in Tsukuba, Japan, for 6 months in one year (2-month interval: February, April, June, August, October, and December) reported that the ambient temperature before going to sleep in December (winter) is 14.5 • C [42] and average bedroom temperature is 10 • C for old persons during winter [32]. High room temperatures set in winter by Indonesians could result in higher energy consumption.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies reported that the temperature and humidity variation are influenced by proximity to heat or humidity sources (laundry, shower, and kitchen) [30]. However, the behavior of respondents in indoor thermal regulations, such as opening windows [30], using fan/AC/heater [31,32], and clothing and bedding [33,34] might vary, over a season [18]. Thus, we instructed respondents to place the sensor and data logger closer and parallel to the head while sleeping, as shown in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

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Thermal Comfort and Sleep Quality of Indonesian Students Living in Japan during Summer and Winter

Budiawan

Tsuzuki

2021

Buildings

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Thermal comfort is crucial in satisfaction and maintaining quality sleep for occupants. In this study, we investigated the comfort temperature in the bedroom at night and sleep quality for Indonesian students during summer and winter. Eighteen male Indonesian students aged 29 ± 4 years participated in this study. The participants had stayed in Japan for about six months. We evaluated the sleep parameters using actigraphy performed during summer and winter. All participants completed the survey regarding thermal sensation, physical conditions, and subjective sleepiness before sleep. The temperature and relative humidity of participants’ bedrooms were also measured. We found that the duration on the bed during winter was significantly longer than that during summer. However, sleeping efficiency during winter was significantly worse than that during summer. The bedroom temperature of the participants was in the range of comfort temperature in Indonesia. With the average bedroom air temperature of 22.2 °C, most of the participants still preferred “warm” and felt “slightly comfortable” during winter. The average comfort temperature each season calculated using the Griffiths method was 28.1 °C during summer and 23.5 °C during winter. In conclusion, differences in adaptive action affect bedroom thermal conditions. Furthermore, habits encourage the sleep performance of Indonesian students.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%