Study of Ventilation Practices and Household Characteristics in New California Homes PDF Download
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Author:
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ISBN:
Category : Dwellings
Languages : en
Pages : 240
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Author:
Publisher:
ISBN:
Category : Dwellings
Languages : en
Pages : 240
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Author: Max H. Sherman
Publisher:
ISBN:
Category :
Languages : en
Pages :
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A survey was conducted to determine occupant use of windows and mechanical ventilation devices; barriers that inhibit their use; satisfaction with indoor air quality (IAQ); and the relationship between these factors. A questionnaire was mailed to a stratified random sample of 4,972 single-family detached homes built in 2003, and 1,448 responses were received. A convenience sample of 230 houses known to have mechanical ventilation systems resulted in another 67 completed interviews. Some results are: (1) Many houses are under-ventilated: depending on season, only 10-50% of houses meet the standard recommendation of 0.35 air changes per hour. (2) Local exhaust fans are under-utilized. For instance, about 30% of households rarely or never use their bathroom fan. (3) More than 95% of households report that indoor air quality is ''very'' or ''somewhat'' acceptable, although about 1/3 of households also report dustiness, dry air, or stagnant or humid air. (4) Except households where people cook several hours per week, there is no evidence that households with significant indoor pollutant sources get more ventilation. (5) Except households containing asthmatics, there is no evidence that health issues motivate ventilation behavior. (6) Security and energy saving are the two main reasons people close windows or keep them closed.
Author: Wanyu R. Chan
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 94
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Author: Brett C. Singer
Publisher:
ISBN:
Category : Fans (Machinery)
Languages : en
Pages : 106
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Author: Brett C. Singer
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ISBN:
Category : Gas appliances
Languages : en
Pages : 186
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Author: Hal Levin
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ISBN:
Category : Indoor air pollution
Languages : en
Pages : 176
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Author:
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ISBN:
Category : Air quality
Languages : en
Pages : 186
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Author:
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ISBN:
Category : Air quality
Languages : en
Pages :
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Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309443628
Category : Medical
Languages : en
Pages : 159
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The U.S. Environmental Protection Agency (EPA) defines PM as a mixture of extremely small particles and liquid droplets comprising a number of components, including "acids (such as nitrates and sulfates), organic chemicals, metals, soil or dust particles, and allergens (such as fragments of pollen and mold spores)". The health effects of outdoor exposure to particulate matter (PM) are the subject of both research attention and regulatory action. Although much less studied to date, indoor exposure to PM is gaining attention as a potential source of adverse health effects. Indoor PM can originate from outdoor particles and also from various indoor sources, including heating, cooking, and smoking. Levels of indoor PM have the potential to exceed outdoor PM levels. Understanding the major features and subtleties of indoor exposures to particles of outdoor origin can improve our understanding of the exposureâ€"response relationship on which ambient air pollutant standards are based. The EPA's Indoor Environments Division commissioned the National Academies of Sciences, Engineering, and Medicine to hold a workshop examining the issue of indoor exposure to PM more comprehensively and considering both the health risks and possible intervention strategies. Participants discussed the ailments that are most affected by particulate matter and the attributes of the exposures that are of greatest concern, exposure modifiers, vulnerable populations, exposure assessment, risk management, and gaps in the science. This report summarizes the presentations and discussions from the workshop.
Author:
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Category : Power resources
Languages : en
Pages : 628
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