Ten questions concerning thermal environment and sleep quality

Lan, Li; Lian, Zhiwei

doi:10.1016/j.buildenv.2016.01.017

Cited by 68 publications

(32 citation statements)

References 61 publications

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“…A study involving a single Alzheimer's patient showed that CO 2 levels in bedroom ≥800 ppm, coincided with patient's restless behavior while such behavior could not be correlated with temperature or humidity levels . Studies on bedside personal ventilation systems have been inconclusive on if such systems can significantly improve subjective thermal sensation and subjective as well as objective sleep parameters although results do show a positive effect, especially in warm‐humid conditions …”

Section: Introductionmentioning

confidence: 99%

“…13 Studies on bedside personal ventilation systems have been inconclusive on if such systems can significantly improve subjective thermal sensation and subjective as well as objective sleep parameters although results do show a positive effect, 14,15 especially in warm-humid conditions. 16 Studies into indoor air quality's impact on sleep are scarce. 2,3,16 High CO 2 concentrations correlate with several indoor pollutants 17 and since occupants are the primary indoor source of both CO 2 and bioeffluents, measuring CO 2 in indoor environment is regarded as a suitable surrogate for IAQ 6 in context of indoor pollutants and bioeffluents, especially with door and windows closed.…”

Section: Introductionmentioning

confidence: 99%

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Window/door opening-mediated bedroom ventilation and its impact on sleep quality of healthy, young adults

et al. 2017

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This work examined window/door opening as means of bedroom ventilation and the consequent effect upon occupants' sleep, using data from 17 healthy volunteers. Bedroom CO level, temperature, and relative humidity were measured over 5 days, for two cases: open window or door (internal, bedroom door), and closed window and door. Participant filled questionnaires and sleep diary provided subjective measure of sleep quality. Actigraphy objectively monitored the participants during sleep. Additionally, a FlexSensor, placed under pillows of participants, detected movement during sleep. Average CO level for the Open conditions was 717 ppm (SD = 197 ppm) and for Closed conditions was 1150 ppm (SD = 463 ppm). Absolute humidity levels were similar for both conditions, while Open conditions were slightly cooler (mean = 19.7°C, SD = 1.8°C) than Closed (mean = 20.1°C, SD = 1.5°C). Results showed significant correlations (P < .001) between actigraphy data and questionnaire responses for: sleep latency (r = .45), sleep length (r = .87), and number of awakenings (r = .28). Of all analyzed sleep parameters, questionnaire-based depth of sleep (P = .002) and actigraphy-based sleep phase (P = .003) were significantly different between Open and Closed conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Window/door opening-mediated bedroom ventilation and its impact on sleep quality of healthy, young adults

et al. 2017

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“…Furthermore current thermal comfort models do not apply to children [34,36]. There is also a strong current interest in implementing results from thermal sensation in climatic control using artificial intelligence [43], climatic control in shared spaces [44,45], influence of environment on sleep comfort [46] and thermal sensation in moderate activities [47]. In conclusion, the need for more research focused on children is recognized in the literature with suggestions of research on children thermal requirements in current and future climates [35].…”

Section: Introductionmentioning

confidence: 99%

Core and local skin temperature: 3–24 months old toddlers and comparison to adults

Garcia-Souto

Dabnichki

2016

Building and Environment

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The thermoregulatory responses, thermal sensation and comfort level of children are very different to those of the adult population, and should be considered in the modelling of thermal comfort and the use of climate control systems in children-shared spaces. In addition, thermoregulation is believed to be related with Sudden Infant Death Syndrome, a major cause of death in children aged below 1 year.However experimental core and skin temperature data of the infant population is very limited, especially in toddlers. The present work investigates and reports the body core and local skin temperature characteristics of young children, as well as their dependency on gender, BMI, age, activity level and clothing. This study's novel features are:clothed subjects were used and the gender representation was balanced;ii) all subjects are children aged 3-24 months -not previously reported in the literature;iii) it is comprehensive in terms of both infant subjects (N=138) and total measurements (over 9000); and iv) it compares the characteristic body and skin temperature in adult and infant population. We observed for instance that children's core temperature is higher than for adults, while their forehead and limbs' temperature increase with age. Also, core and skin temperature seem to become more dependent on BMI with age maturation. Keywords

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“…The level and improvement of indoor air quality (IAQ) is an on-going subject that is the topic of interest for researchers around the world for both residential and non-residential buildings [1][2][3][4][5][6][7][8][9]. Lan and Lian [2] proved the level of indoor air quality and thermal regulation influences the quality of sleep while Madureira et al [9] conducted a study to connect the indoor air quality in schools and its relationship with children's respiratory symptoms.…”

Section: Introductionmentioning

confidence: 99%

“…Lan and Lian [2] proved the level of indoor air quality and thermal regulation influences the quality of sleep while Madureira et al [9] conducted a study to connect the indoor air quality in schools and its relationship with children's respiratory symptoms. The studies show that the quality of the indoor air is an important factor for human health.…”

Section: Introductionmentioning

confidence: 99%

Indoor air quality modelling and measurements of a studio apartment with a mechanical exhaust system

Szczepanik-Ścisło

Flaga-Maryańczyk

2018

E3S Web Conf.

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Abstract. The aim of the research were measurements and an attempt to model the indoor air quality (IAQ) within a studio apartment with a mechanical exhaust system, manually controlled by the occupants. The authors based the modelling on the occupancy schedule of the family members and the recorded operation duration of the ventilation system. The purpose of the performed analysis was to answer the question if it is possible and to what extent to reflect numerically the conditions within the tested object. The authors studied also the carbon dioxide level in the context of controlling the system by the residents. The simulations were carried out using the CONTAM software, developed by NIST (National Institute of Standards and Technology).

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Ten questions concerning thermal environment and sleep quality

Cited by 68 publications

References 61 publications

Window/door opening-mediated bedroom ventilation and its impact on sleep quality of healthy, young adults

Window/door opening-mediated bedroom ventilation and its impact on sleep quality of healthy, young adults

Core and local skin temperature: 3–24 months old toddlers and comparison to adults

Indoor air quality modelling and measurements of a studio apartment with a mechanical exhaust system

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