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With a tighter building envelope more minimal influences come into consideration. As how the thermal and hygrothermal properties of the materials may improve the ventilation or whether the dust distribution is altered with the new surface temperatures and flows and of course how all other new chemicals which we introduce to living environments affects the IAQ. Preferably the in situ measurement data from the filed campaigns and case studies will be defined as ST5 in Annex 68.
The objectives of subtask 5 are to carry out field tests and analysis of buildings for testing and verification of the results from the other subtasks and to investigate new ventilation patterns in highly energy efficient residential buildings based on improved airtightness, increase insulation, use of materials, and possibly also new residential behaviour.