This paper presents results from a case study on IAQ in a residence where the occupants complained about health problems during a few years’ time including infants after they changed the flooring to a new parquet flooring in both the floors. During the last years the health conditions of the children became very bad resulting into several emergency visits to the hospital. This study presents measured values for VOC and aldehydes under different conditions. Initial measurements showed that the values were very high and exceeded all the recommended health Hazard limits. This resulted into the decision that all the parquet flooring was removed. This study shows how the values of VOC and aldehydes decreased with time and also the decrease did not follow the general diffusion principles. Therefore, forced ventilation conditions under elevated temperature and very high relative humidity were used to accelerate the release rate. This study shows that elimination of volatiles was a very slow process and it took almost 30 days to achieve acceptable concentration levels both for the aldehydes and for the VOCs.

This case study shows for the first time that although such flooring material meets the standard, how they may influence the IAQ of residential houses. In case if such contaminations occur, this study also shows that how the reduction rates of chemicals and specially aldehydes in indoor air could be accelerated by using different accelerated ventilation conditions. The study shows that the health hazards due to the presence of aldehydes in indoor air are underestimated in normal IAQ control routines. Since, aldehydes are classified as carcinogens, the study shows that measurement of aldehyde concentrations in indoor air should always be included in the indoor air quality control to assure a healthy indoor air climate.

本文介绍了一个住宅中IAQ的案例研究结果，居住者抱怨几年内的健康问题，包括婴儿，他们在地板和地板上都更换成新的拼花地板后，才开始使用。在过去的几年中，孩子们的健康状况变得非常糟糕，导致多次紧急访问医院。这项研究提出了在不同条件下VOC和醛的测量值。初步测量表明，该值非常高，超过了所有建议的健康危害限值。这导致所有镶木地板都被拆除的决定。这项研究表明，VOC和醛类的值如何随时间下降，并且这种下降也没有遵循一般的扩散原理。因此，在高温和很高的相对湿度下使用强制通风条件以加快释放速度。这项研究表明，消除挥发物的过程非常缓慢，醛和VOC均达到可接受的浓度水平花费了将近30天。

该案例研究首次表明，尽管此类地板材料符合标准，但它们如何影响住宅的室内空气质量。如果发生此类污染，这项研究还表明，通过使用不同的加速通风条件，如何加快室内空气中化学物质（特别是醛）的还原率。研究表明，在室内空气质量控制程序中，低估了室内空气中存在的醛对健康的危害。由于醛被归类为致癌物，因此研究表明，室内空气中醛浓度的测量应始终包括在室内空气质量控制中，以确保室内空气的健康。