The effect of ventilation on volatile organic compounds produced by new furnishings in residential buildings

Hernandez, German; Wallis, Shannon L.; Graves, I. L.; Narain, Surya; Birchmore, Roger; Berry, Terri-Ann

doi:10.1016/j.aeaoa.2020.100069

Cited by 14 publications

(14 citation statements)

References 45 publications

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“…Noticeably, because of the absence of mechanical ventilation, TVOC concentrations are over three times higher in the more airtight rooms. By using mechanical ventilation, Hernandez et al [121] found that TVOC concentrations can be reduced by >340 µg/m −3 in less airtight rooms. Hu et al [122] proposed an improved strategy for reducing indoor VOCs pollutions.…”

Section: Vocs and Tvoc Concentrationsmentioning

confidence: 99%

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Jia¹,

Han²,

Chen

et al. 2021

Buildings

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Thermal comfort and indoor air quality (IAQ) of educational buildings can affect students’ academic performance and well-being and are closely related to ventilation energy consumption. Demands of the indoor environmental quality within the classroom generally vary with the education levels and result in ventilation energy consumption accounting for a considerable proportion of the total energy use in bulk educational buildings. Its huge energy-saving potential is attracting worldwide attention from scholars and governments. Therefore, appropriate operation strategies of ventilation systems should be adopted to effectively reduce energy consumption without sacrificing thermal comfort and IAQ. However, the absence of relevant standards and guidelines for designing a quality classroom environment considering the special features of educational buildings remains an important research question. This study conducts a comprehensive review to determine research gaps and identify future directions for the interaction between thermal comfort, IAQ and ventilation energy consumption for educational buildings. The review results show that: (1) The thermal comfort prediction model should consider the influences of genders, ages and socioeconomic backgrounds; (2) The mixed-mode ventilation coupling the natural and mechanical approaches is preferred given its advantage of lower energy consumption and improved thermal comfort, but its control strategies need further exploration; (3) Optimizing passive design parameters of buildings (e.g., window to wall ratios, window orientations and sun shading installations) can significantly reduce the ventilation demands while maintaining indoor thermal comfort; (4) More studies are required for investigating thermal comfort in educational buildings during the heating period; and (5) IAQ of university buildings clearly requires further studies, especially on bacterial and fungal aerosol pollutants, for a more comprehensive assessment of the built environment.

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Section: Vocs and Tvoc Concentrationsmentioning

confidence: 99%

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Jia¹,

Han²,

Chen

et al. 2021

Buildings

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“…The general outdoor and indoor sources as well as parameters affecting the concentrations of all those contaminants are already well known (see eg, references for: CO, 19,20 NO 2 , 20‐23 PM, 24‐28 UFP, 29‐35 VOC, 36‐41 HCHO, 20 O 3 , 21,42 bioparticles 43 ). There are also many international reports by WHO 20,21,44 as well as epidemiological and other studies summarizing and showing a scientific evidence of several possible health effects of those contaminants (see eg, references for CO, 20,44 NO 2 , 20,45‐49 PM, 28,50,51 UFP, 52,53 DBP, 35,54‐57 VOC, 36‐40,58 HCHO, 20,35,59 O 3 , 42,60,61 bioparticles 43,44,62‐64 ). However, the knowledge of the exposure to these pollutants in different sports facilities is very scattered and limited.…”

Section: Introductionmentioning

confidence: 99%

Human exposure to air contaminants in sports environments

2020

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Physical activity is one of the most basic human functions and a significant basis of health. The World Health Organization (WHO) 1 recommends that adults, including older adults, undertake at least 2.5 hours of moderately intense aerobic activity per week. With an increasing number of sports enthusiasts worldwide, the number of indoor sports facilities and the number of workers in those facilities have also increased dramatically in the past decades. However, unlike residential areas and other types of public spaces, such as schools and offices, there is relatively little published research about air quality and exposure to different pollutants in various indoor sports facilities, 2,3 where a growing number of people exercise, work full or part time, or attend athletic events. 4,5 Although many studies of athletes' exposure to ambient air contaminants have been published, 6-10 little work is known about the exposure to air pollutants in different indoor sports facilities. Available publications have been focused on ice arenas, with the most investigated pollutants being carbon monoxide (CO), nitrogen dioxide (NO 2), and particulate matter (PM 10 and PM 2.5 , referring to

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“…Indoors, VOCs are known to be emitted from a wide variety of sources. These sources include building materials (11), furnishings (12), household products (e.g., detergents) (13), personal care products (e.g., cosmetics) (14), and human activities (e.g., cooking) (15). In addition to these relatively well-studied sources, modern electronic devices that contain large numbers of commercial chemicals (16,17) may also be a source for indoor VOCs.…”

mentioning

confidence: 99%

Liquid crystal display screens as a source for indoor volatile organic compounds

Liu

Abbatt

2021

Proc. Natl. Acad. Sci. U.S.A.

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Liquid crystal displays (LCDs) have profoundly shaped the lifestyle of humans. However, despite extensive use, their impacts on indoor air quality are unknown. Here, we perform flow cell experiments on three different LCDs, including a new computer monitor, a used laptop, and a new television, to investigate whether their screens can emit air constituents. We found that more than 30 volatile organic compounds (VOCs) were emitted from LCD screens, with a total screen area–normalized emission rate of up to (8.25 ± 0.90) × 109 molecules ⋅ s–1 ⋅ cm–2. In addition to VOCs, 10 liquid crystal monomers (LCMs), a commercial chemical widely used in LCDs, were also observed to be released from those LCD screens. The structural identification of VOCs is based on a “building block” hypothesis (i.e., the screen-emitted VOCs originate from the “building block chemicals” used in the manufacturing of liquid crystals), which are the key components of LCD screens. The identification of LCMs is based upon the detailed information of 362 currently produced LCMs. The emission rates of VOCs and LCMs increased by up to a factor of 9, with an increase of indoor air humidity from 23 to 58% due to water–organic interactions likely facilitating the diffusion rates of organics. These findings indicate that LCD screens are a potentially important source for indoor VOCs that has not been considered previously.

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The effect of ventilation on volatile organic compounds produced by new furnishings in residential buildings

Cited by 14 publications

References 45 publications

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Interaction between Thermal Comfort, Indoor Air Quality and Ventilation Energy Consumption of Educational Buildings: A Comprehensive Review

Human exposure to air contaminants in sports environments

Liquid crystal display screens as a source for indoor volatile organic compounds

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