Subjective perceptions, symptom intensity and performance: a comparison of two independent studies, both changing similarly the pollution load in an office

Wargocki, Paweł; Lagercrantz, Love Per; Witterseh, Thomas; Sundell, Jan; Wyon, David Peter; Fanger, Povl Ole

doi:10.1034/j.1600-0668.2002.01101.x

Cited by 77 publications

(48 citation statements)

References 7 publications

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“…This field therefore represents a massive gross energy saving potential. Simply reducing ventilation rates, however, will deteriorate the indoor air quality and therefore sort unwanted effects such as increasing the incidence of respiratory illness (Seppänen & Fisk, 2004) and loss of productivity (Wargocki, 2002).…”

Section: Introductionmentioning

confidence: 99%

Energy saving potential and repercussions on indoor air quality of demand controlled residential ventilation strategies

Laverge

Bossche

Heijmans

et al. 2011

Building and Environment

146

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Because of several motivators, such as the mitigation of global warming, the reaching of peak oil and health concerns related to fossil fuel burning, contemporary building practise is searching for advanced concepts and technological innovations that will allow to maintain or improve the comfort level that is currently reached while reducing the energy consumption that is related to it. Ventilation is ambiguously related with this energy saving rationale. Since it makes up for about half of the energy consumption in well insulated building, it is an attractive target for energy saving measures. However, simply reducing ventilation rates has unwanted repercussions on the indoor air quality. Two main strategies have been developed to reconcile these seemingly opposing interests, namely heat recovery and demand control ventilation. This paper focuses on the energy saving potential of demand controlled mechanical exhaust ventilation in residences and on the influence such systems may have on the indoor air quality to which the occupants of the dwellings are exposed. The conclusions are based on simulations done with a multi-zone airflow model of a detached house that is statistically representative for the average Belgian dwelling. Several approaches to demand based control are tested and reported. Both energy demand and exposures are reported in comparison with a classic system, operating with continuous flowrates, that is building code compliant. This is necessary to assure that the reported energy saving potential does not derogate the indoor air quality. Within the paper exposure to carbon dioxide and to an odour tracer gas are used as indoor air quality indicators. Monte-Carlo techniques are used to ensure that the reported results are representative for the diverse boundary conditions and parameters that may occur with real life implementation of such a system. Under the conditions that were applied, reductions on the energy demand for ventilation -with the exclusion of adventitious ventilation and infiltration -of 5 to 60% can be reported, depending on the control strategy that is implemented.

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Section: Introductionmentioning

confidence: 99%

Energy saving potential and repercussions on indoor air quality of demand controlled residential ventilation strategies

Laverge

Bossche

Heijmans

et al. 2011

Building and Environment

146

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“…There are many self-reported triggers including weather, [1] fatigue, stress, food, menstruation, and infections [2]. Air quality in the home [3], office environment [4,5], and the occupational setting [6] may also exacerbate headaches. A daily diary study of 32 headache sufferers in Italy revealed that the severity and frequency of headaches was related to days with higher concentrations of carbon-monoxide and nitrogen dioxide [7].…”

Section: Introductionmentioning

confidence: 99%

Emergency department visits for migraine and headache: a multi-city study

Szyszkowicz¹,

Kaplan²,

Grafstein³

et al. 2009

International Journal of Occupational Medicine and Environmental Health

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Objectives: We set out to examine associations between ambient air pollution concentrations and emergency department (ED) visits for migraine/headache in a multi-city study. Materials and Methods: We designed a time-series study of 64 839 ED visits for migraine (ICD-9: 346) and of 68 495 ED visits for headache (ICD-9: 784) recorded at hospitals in five different cities in Canada. The data (days) were clustered according to the hierarchical structure (location, year, month, day of week). The generalised linear mixed models technique was applied to fit the logarithm of clustered daily counts of ED visits for migraine, and separately for headache, on the levels of air pollutants, after adjusting for meteorological conditions. The analysis was performed by sex (all, male, female) and for three different seasonal periods: whole (January-December), warm (April-September), and cold (October-March). Results: For female ED visits for migraine, positive associations were observed during the warm season for sulphur dioxide (SO 2 ), and in the cold season for particulate matter (PM 2.5 ) exposures lagged by 2-days. The percentage increase in daily visits was 4.0% (95% CI: 0.8-7.3) for SO 2 mean level change of 4.6 ppb, and 4.6% (95% CI: 1.2,-8.1) for PM 2.5 mean level change of 8.3 μg/m 3 . For male ED visits for headache, the largest association was obtained during the warm season for nitrogen dioxide (NO 2 ), which was 13.5% (95% CI: 6.7-20.7) for same day exposure. Conclusions: Our findings support the associations between air pollutants and the number of ED visits for headache.

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“…Migraine triggers include weather [1], fatigue, stress, food, menstruation, and infections [2]. Air quality in the home [3], office environment [4,5], and occupational setting may play a role in the exacerbations of migraine headache [6]. A daily diary study of 32 headache sufferers in Italy revealed that the severity and frequency of headaches correlated with days when elevated concentrations of carbon monoxide and nitrogen dioxide were recorded [7].…”

Section: Introductionmentioning

confidence: 99%

Ambient sulphur dioxide exposure and emergency department visits for migraine in Vancouver, Canada

Szyszkowicz

Rowe²,

Kaplan³

2009

International Journal of Occupational Medicine and Environmental Health

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Objectives: Ambient exposure to sulphur dioxide (SO 2 ) has been previously associated with emergency department (ED) visits for migraine headaches. In the present study, the objective was to examine the relationship between ED visits for migraine and ambient sulphur dioxide concentrations. Design and Methods: This was a time-series study of 1 059 ED visits for migraine (ICD-9: 346) recorded at a Vancouver hospital between 1999 and 2003 (1 520 days). Air pollution levels of SO 2 were measured by fixed-site monitoring stations. The generalized linear mixed models technique was applied to regress daily counts of ED visits for migraine on the levels of the pollutant after adjusting for meteorological conditions: temperature and relative humidity. The analysis was stratified by season and gender. Results: Positive and statistically significant correlations were observed for SO 2 exposure and ED visits for migraine for females during colder months (OctoberMarch). The percentage increase in daily visits was 16.8% (95% CI: 1.2-34.8) for a 4-day average (of daily mean concentrations) SO 2 level, for an interquartile range (IQR) increase of 1.9 ppb. Conclusions: Our findings provide additional support for a consistent correlation between migraine headache and air pollution (SO 2 ).

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Subjective perceptions, symptom intensity and performance: a comparison of two independent studies, both changing similarly the pollution load in an office

Cited by 77 publications

References 7 publications

Energy saving potential and repercussions on indoor air quality of demand controlled residential ventilation strategies

Energy saving potential and repercussions on indoor air quality of demand controlled residential ventilation strategies

Emergency department visits for migraine and headache: a multi-city study

Ambient sulphur dioxide exposure and emergency department visits for migraine in Vancouver, Canada

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