SUMMARY To control the emission of pollutants from building materials, labelling systems have been introduced. Some of the systems combine measurements of volatile organic compounds according to 16000-9 and sensory evaluations. In Denmark, the sensory tests are performed by a minimum of 20 subjects. The subjects assess the air quality using a continuous acceptability scale and an odour intensity scale. In Germany the sensory evaluation system is being developed. The volumetric flow in the chambers is too low for direct sensory evaluation. Thus a system is developed to sample the air from air sampling bag. The air is evaluated by a panel of at least 10 persons using a reference scale. For the Finnish M1 label the sensory evaluations are performed by 5 to 10 subjects assessing air quality using a continuous acceptability scale and describing the odour using a list of odour profiles. The purpose of the present paper is to compare and discuss the sensory test procedures of the different labelling systems.