NDLI: Residential air exchange rates in three major US metropolitan areas: results from the Relationship Among Indoor, Outdoor, and Personal Air Study 1999-2001.

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Residential air exchange rates in three major US metropolitan areas: results from the Relationship Among Indoor, Outdoor, and Personal Air Study 1999-2001.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Yamamoto, N. Shendell, D. G. Winer, A. M. Zhang, J.
Spatial Coverage	United States
Description	Country affiliation: United States Author Affiliation: Yamamoto N ( Environmental Engineering Program, Yale University, 9 Hillhouse Ave., New Haven, CT 06520, USA. naomichi.yamamoto@yale.edu)
Abstract	UNLABELLED: We report approximately 500 indoor-outdoor air exchange rate (AER) calculations based on measurements conducted in residences in three US metropolitan areas in 1999-2001: Elizabeth, New Jersey; Houston, Texas; and Los Angeles County, California. Overall, a median AER across these urban areas and seasons was 0.71 air changes per hour (ACH, or per hour; n = 509) while median AERs measured in California (n = 182), New Jersey (n = 163), and Texas (n = 164) were 0.87, 0.88, and 0.47 ACH, respectively. In Texas, the measured AERs were lower in the summer cooling season (median = 0.37 ACH) than in the winter heating season (median = 0.63 ACH), likely because of the reported use of room air conditioners as Houston is typically hot and humid during the summer. The measured AERs in California were higher in summer (median = 1.13 ACH) than in winter (median = 0.61 ACH). Because the summer cooling season in Los Angeles County is less humid than in New Jersey or Texas, natural ventilation through open windows and screened doors likely increased measured AER in California study homes. In New Jersey, AER were similar across heating and cooling seasons, although the median AER was relatively lower during the spring. PRACTICAL IMPLICATIONS: Adequate ventilation or air exchange rate (AER) for an indoor environment is important for human health and comfort, and relevant to building design and energy conservation and efficiency considerations. However, residential AER data, especially measured by more accurate non-toxic tracer gas methodologies, are at present quite limited worldwide, and are insufficient to represent the variations across regions and seasons within and between homes, including apartments and condominiums in more densely populated urban areas. The present paper presents quantitative and qualitative data to characterize residential AERs in three US urban areas with different climate attributes.
File Format	HTM / HTML
ISSN	09056947
Issue Number	1
Volume Number	20
e-ISSN	16000668
Journal	Indoor Air
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2010-02-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Environmental Health Air Pollutants Analysis Air Pollution, Indoor Environmental Monitoring Urban Population Ventilation Methods Statistics & Numerical Data Humans Seasons United States Journal Article
Content Type	Text
Resource Type	Article
Subject	Building and Construction Public Health, Environmental and Occupational Health Environmental Engineering

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