Air Stuffiness and Air Exchange Rate in French Schools and Day-Care Centres

Ramalho, Olivier; Mandin, Corinne; Ribéron, Jacques; Wyart, Guillaume

doi:10.1080/14733315.2013.11684013

Cited by 38 publications

(42 citation statements)

References 1 publication

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“…-1000 ppm: guideline value provided in the French regulation for non-residential buildings [16]; -1500 ppm: guideline value recommended for schools in the United Kingdom [40]; -2000 ppm: upper limit value for average CO 2 level observed in French schools during occupancy [33].…”

Section: Discussionmentioning

confidence: 99%

“…The second set of data comes from a national survey conducted on 310 French nurseries (children aged 0e3 years), kindergartens (children aged 3e5 years) and elementary schools (children aged 6e10 years) carried out between September 2009 and July 2011 [32,33]. Corsica and overseas departments of R eunion Island and Martinique were also included in the survey.…”

Section: School Surveymentioning

confidence: 99%

See 1 more Smart Citation

Association of carbon dioxide with indoor air pollutants and exceedance of health guideline values

Ramalho

Wyart

Mandin

et al. 2015

Building and Environment

100

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Section: Discussionmentioning

confidence: 99%

Section: School Surveymentioning

confidence: 99%

Association of carbon dioxide with indoor air pollutants and exceedance of health guideline values

Ramalho

Wyart

Mandin

et al. 2015

Building and Environment

100

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“…Logue et al [7] suggested that PM 2.5 is one of the air pollutants which dominate health impacts in most U.S. residences Apart from those chemical toxicants and particulate matters, it is found that the CO 2 level may exceed 1500 ppm in classrooms in East London, which is much higher than the recommended level of 600 ppm from the Chartered Institution of Building Services Engineers (CIBSE) [33]. Ramalho et al [34] investigated the indoor CO 2 concentration in 489 mechanically ventilated classrooms in France, and the results indicated that 33% of the samples had a CO 2 concentration above 1700 ppm, which is two times greater than the CIBSE value.…”

Section: Introductionmentioning

confidence: 93%

Investigation of Indoor Air Quality and the Identification of Influential Factors at Primary Schools in the North of China

2017

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Over 70% of a pupil's school life is spent inside a classroom, and indoor air quality has a significant impact on students' attendance and learning potential. Therefore, the indoor air quality in primary school buildings is highly important. This empirical study investigates the indoor air quality in four naturally ventilated schools in China, with a focus on four parameters: PM 2.5 , PM 10 , CO 2 , and temperature. The correlations between the indoor air quality and the ambient air pollution, building defects, and occupants' activities have been identified and discussed. The results indicate that building defects and occupants' activities have a significant impact on indoor air quality. Buildings with better air tightness have a relatively smaller ratio of indoor particulate matter (PM) concentrations to outdoor PM concentrations when unoccupied. During occupied periods, the indoor/outdoor (I/O) ratio could be larger than 1 due to internal students' activities. The indoor air temperature in winter is mainly determined by occupants' activities and the adiabatic ability of a building's fabrics. CO 2 can easily exceed 1000 ppm on average due to the closing of windows and doors to keep the inside air warmer in winter. It is concluded that improving air tightness might be a way of reducing outdoor air pollutants' penetration in naturally ventilated school buildings. Mechanical ventilation with air purification could be also an option on severely polluted days.

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“…Under that hypothesis, AER was determined using a simple mass balance equation and linear regression on log-transformed CO 2 concentrations (Ramalho et al, 2013). Each decay was taken into account only if it had more than 9 points (1h30 of decay) and if the determination coefficient of the linear regression was higher than 0.9.…”

Section: Measurement Of Ambient Parametersmentioning

confidence: 99%

Concentration and determinants of molds and allergens in indoor air and house dust of French dwellings

Dallongeville

Cann

Zmirou‐Navier

et al. 2015

Science of The Total Environment

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Molds and allergens are common indoor biocontaminants. The aims of this study were to assess the concentrations of common molds in indoor air and floor dust and the concentrations of house dust mite, cat and dog allergens in mattress dust in French dwellings, and to assess predictors of these concentrations. A sample of 150 houses in Brittany (western France) was investigated.Airborne Cladosporium and Penicillium were detected in more than 90% of the dwellings, Aspergillus in 46% and Alternaria in only 6% of the housings. Regarding floor dust samples, Cladosporium and Penicillium were detected in 92 and 80% of the housings respectively, Aspergillus in 49% and Alternaria in 14%. House dust mite allergens Der p1 and Der f1 were detected in 90% and 77% of the mattress dust samples respectively and Can f1 and Fel d1 in 37% and 89% of the homes. Airborne and dustborne mold concentrations, although not statistically correlated (except for Aspergillus) shared most of their predictors. Multivariate linear models for mold levels, explaining up to 62% of the variability, showed an influence of the season, of the age of the dwelling, of aeration habits, presence of pets, smoking, signals of dampness, temperature and relative humidity. Allergens in the dust of the mattress were strongly related to the presence of pets and cleaning practices of bedsheets, these factors accounting for 60% of the variability. This study highlights ubiquitous contamination by molds and underlines complex interaction between outdoor and indoor sources and factors.3

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Air Stuffiness and Air Exchange Rate in French Schools and Day-Care Centres

Cited by 38 publications

References 1 publication

Association of carbon dioxide with indoor air pollutants and exceedance of health guideline values

Association of carbon dioxide with indoor air pollutants and exceedance of health guideline values

Investigation of Indoor Air Quality and the Identification of Influential Factors at Primary Schools in the North of China

Concentration and determinants of molds and allergens in indoor air and house dust of French dwellings

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