Investigation On Indoor Air Quality Of Building

With the rapid development of real estate and the reform of house policy, the indoor air pollution due to the house decoration is growing important. As the result, the investigation and evaluation of indoor air quality must be strengthened, in the other hand, the general characterization and the influential factor of indoor air pollution should be studied for the controlling of the pollution.The indoor air quality of indoor environment was studied in this paper. Firstly it investigated the regulations on IAQ and made a comparative research. From it, the author pointed out the existing problems.And by the experiments with self-made environmental chamber, we try to find the relationship between the emission of formaldehyde and other factors, such as temperature, humidity, air exchange ratio and so on. Then basing on it, house decoration and indoor air pollution were investigated in city dwelling houses in Shenyang. Then the indoor air quality study of the new Northeaster University Multiple Builiding in a comprehensive and systematic way is studied. According to the situation of the research, a number of reasonable and effective measures are proposed to improve indoor air quality.By the experiment of testing chamber, we get the conclusion that when AER is large, formaldehyde could diffuse into outdoor environment easily which helps improve the quality of indoor air. And when the temperature is high, the emission rate of formaldehyde is large,especially when AER is low, the concentration of formaldehyde may be more than ten times of the national standard. In contrast to this, when RH is high, the emission rate of formaldehyde is low, so high RH is preferable in indoor environment. In Shenyang, the main over-ratio index is formaldehyde, benzol ammonia and VOC;γ-ray and radon is never; The formaldehyde is the main indoor pollutant of decorated houses in Shenyang. Through objective formaldehyde-apparatus measured in Mutiple Building, and have completed various forms of comparison and analysis for the use of data, and have.studied the distributed situation in the building and their changes over time. Through the making of subjective investigation form, carry on the subjective satisfaction questionnaire to the people relative to the building. Their evaluation on indoor air quality, thermal environment, auditory environment and visual environment is investigated. Count the subjective investigation results, analyzed several difference questions in subjective appraisal.And new input air and temperature have main effect on indoor air quality. The study will provide us aim and guides us directions in future research.