The dichotomy of relative humidity on indoor air quality

Wolkoff, Peder; Kjærgaard, Søren K.

doi:10.1016/j.envint.2007.04.004

Cited by 191 publications

(129 citation statements)

References 102 publications

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“…Results from a number of field studies have confirmed this. For example, Gao et al (2015) revealed for Beijing that the size of aerosol particles increases by moisture absorption under high humidity conditions; Markowicz and Larsen (2015) demonstrated rapid increases in indoor VOC concentrations (a precursor of OA) with rises in room humidity; and but Wolkoff et al (2007) contended that low relative there is a dichotomous association between humidity and indoor air quality.humidity may directly influence worker health rather than impact it via relationships with poor indoor air quality.…”

Section: Air Qualitymentioning

confidence: 99%

Humidity: A review and primer on atmospheric moisture and human health

Davis

McGregor

Enfield

2016

Environmental Research

320

208

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. cases when the proximity to saturation is not medically relevant. Care must be taken in averaging certain humidity variables daily or seasonally to avoid statistical biasing associated with variables that are inherently diurnal through their relationship to temperature.

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Section: Air Qualitymentioning

confidence: 99%

Humidity: A review and primer on atmospheric moisture and human health

Davis

McGregor

Enfield

2016

Environmental Research

320

208

View full text Add to dashboard Cite

show abstract

“…Ozone generation (Grøntoft and Raychaudhuri, 2004) Particulate generation (Hitzenberger et al, 1997) IAQ (Fang et al, 2004) (Nordström et al, 1994) (Wolkoff and Kjaergaard, 2007) (Reinikainen et al, 1991;Reinikainen et al, 1992;Reinikainen and Jaakkola, 2003) Skin irritation and IEQ Multi-story office building …”

Section: Ieqmentioning

confidence: 99%

Update of the scientific evidence for specifying lower limit relative humidity levels for comfort, health, and indoor environmental quality in occupied spaces (RP-1630)

Derby

Hamehkasi

Eckels

et al. 2016

Science and Technology for the Built Environment

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Nearly 600 papers were located in citation and keyword searches regarding the effects of humidity on comfort, health, and indoor environmental quality (IEQ). Of these, around 70 papers reported the effects of low humidity (RH≤40%) and were analyzed in detail. Information in some categories was well chronicled, while other categories had significant knowledge gaps.Low humidity decreased house dust mite allergens. Due to different envelopes, generalizations could not be made for all bacteria and viruses. However, lower humidity increased virus survival for influenza. For comfort, low humidity had little effect on thermal comfort, but skin dryness, eye irritation, and static electricity increased as humidity decreased. For IEQ, low humidity had non-uniform effects on volatile organic compound (VOC) emissions and perceived indoor air quality. Across many low humidity studies, ventilation rates and exposure times were noted as confounding variables. A majority of studies that used human subjects utilized exposure times of three hours or less with adult subjects; few studies used children, adolescents, or elderly subjects.

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“…The second condition is based on the thermoneutral zone definition, the range of ambient temperature at which human thermoregulation is achieved only by control of sensible heat loss, i.e., between 28.5~32 °C DBT [10].…”

Section: Discussionmentioning

confidence: 99%

Exhaust Ventilation through a Solar Chimney: A Response to High Hermeticity in Welfare Housing

González-Trevizo¹,

Gómez-Amador²,

Luna-León³

et al. 2015

JCEA

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This research reports on potentiality in the solar chimney as an exhaust ventilation device through a hypothetical statement that convenient weather conditions exist on sub-humid warm climate to enhance the performance of a SC (solar chimney), in order to increase ventilation to dissipate metabolic heat from inhabitants of airtight buildings. The methodology used in this research integrates the use of simplified mathematical models that predict in a semi-empirical way a potential volume flow through estimation of kinetic power generation, by natural circulation and stack effect in a typical covered-plate air solar collector. The study was carried out during the warm month of April, an important warm season for Colima, where the prevailing wind is about 6.8 m/s, the average temperature of maximums and minimums oscillates between 15.4 °C and 34.4 °C with average relative humidity of 65% according to national weather service. A scale model of the SC was installed on environmental chambers. The results showed that this device is capable of generating ventilation conditions around light breeze parameters near between 0.6 m/s and 1.5 m/s width, a better performance at day in 45% approximately than the night values, making ventilation rates up 0.24 ACH (air changes per hour) as average air change rate.

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The dichotomy of relative humidity on indoor air quality

Cited by 191 publications

References 102 publications

Humidity: A review and primer on atmospheric moisture and human health

Humidity: A review and primer on atmospheric moisture and human health

Update of the scientific evidence for specifying lower limit relative humidity levels for comfort, health, and indoor environmental quality in occupied spaces (RP-1630)

Exhaust Ventilation through a Solar Chimney: A Response to High Hermeticity in Welfare Housing

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