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KMID : 0895420070170010031
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Journal of Korean Society of Occupational and Enviromental Hygiene
2007 Volume.17 No. 1 p.31 ~ p.42
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Assessment of Indoor Air Quality in Commercial Office Buildings
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Jeong Jee-Yeon
Lee Byung-Kyu
Phee Young-Gyu
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Abstract
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Recently, concerns regarding indoor air quality in offices have continued to increase. Thirty offices in five metropolitan commercial buildings were surveyed from February to April 2004. Sampling was performed during normal business hours. Thermal comfort factors such as temperature and relative humidity, carbon dioxide (CO2), carbon monoxide (CO), formaldehyde (HCHO), respirable dust, PM10 were sampled and analyzed to determine the mean, standard deviation, range, and correlation for each of those parameters. The data was then compared to office as standard of Ministry of Labor, and guideline applicable to the indoor environment. The results represented that the temperature was slightly higher than the standard of American Society of Refrigerating and Air- Conditioning Engineers (ASHRAE), the relative humidity was lower that the standard of ASHRAE. The range of the 8-TWA concentration of CO2 was 639 ~ 786 ppm, but 33.3% of the total thirty offices exceeded the 1000 ppm as ceiling concentration. The concentration of CO was less than 3 ppm, which was similar to that of offices in Japanese. The mean concentration of formaldehyde was 0.032 ppm, and only 2 % of total samples (193) exceeded the 0.1 ppm, standard of formaldehyde in office air. The concentration of respirable dust and PM10 was not exceeded the standard of those parameters, 150 ㎍/㎥. The concentration of those parameters in the office air was statistically correlated.
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KEYWORD
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Office, Indoor air quality, Comfort parameter, Carbon dioxide
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