Abstract
The purpose of this survey is to know the actual conditions during the summer of the residential indoor environment in urban area in China. The apartment houses under investigation were sited in urban area of Shanghai, Hong Kong and Xi'an. The questionnaire survey and the measurement of indoor temperature and humidity were done in the summer of 1998 for Shanghai and 2001 for Hong Kong and Xi'an. The questionnaire survey revealed the life style of summer season and the way of use of air-conditioner. The measurement showed that indoor temperature and humidity in Hong Kong and Shanghai are very high. In comparison with these two cities, indoor environment was not so severe in Xi'an.
