Increases in building air tightness for purposes of energy saving have, unfortunately, also led to a significant increase in the number of instances of condensation damage, particularly in domestic properties. The cost effective control of condensation is a large problem in the United Kingdom, especially for local authorities with large housing stocks.
This report describes research work en a p:iSsive ventilation system installed in occupioo housing arrl provides sinple design guidance with recarmendations for future work.