Abstract
The article presents detailed experimental results on the hygrothermal performance of various ventilation cavities. In total 8 full-scale test walls have been installed in a test house to study the impact of different cladding materials (fibre cement sidings/brick veneer cladding) and the size of ventilation openings on the conditions in the cavity. Two measuring methods, hot bead anemometry and air pressure registration, are used to investigate the ventilation rate within the cavities configurations. In addition, equipment was installed to monitor the effect of the ventilation rate on the temperature and humidity conditions within the walls. The results indicate that the air change rate behind brick veneer (1-10ACH) is typically two orders of magnitude smaller than the ventilation behind wall systems with sidings (>100-ACH).
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