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The objective of our study is to determine the indoor air quality of a low-energy wooden house. During the field measurements we detected the presence of formaldehyde (34 µg/m 3 ), BTX (35.51 µg/m 3 ), and some materials in the terpene family, limonene (64.7 µg/m 3 ), and alpha-pinene (297 µg/m 3 ), in the indoor air. The concentration of the detected TVOC (Total Volatile Organic Compounds) was 2150 µg/m 3 , which does not significantly differ from European average values. The LCI (Lowest Concentration of Interest) analysis shows that none of the VOCs tested by us are a health risk to the occupants in the building. However, it can be established that the health risk of benzene (0.622) stands out from the tested substances. The health risks of other aliphatic hydrocarbons (0.176) and alpha- pinene (0.198) may be considered identical, but even these do not pose a risk to humans. In order to clarify the sources of the harmful substances further investigations are needed.

Indoor Air Quality Testing in Low-Energy Wooden Houses: Measurement of Formaldehyde and VOC-s