Airtightness in North America seen from Building Physics Viewpoint

Environmental control (heat, air and moisture flows and their effects) started 90 years ago on Prairies of Canada and USA. It has always been based on occupant’s interest in a better indoor environment and driven by builders. More recently, when energy efficiency and durability considerations became part of socio-economic requirements of the society this part of building physics was shifted to the interests of governments.

Strategies for the planning and implementation of airtightness on existing sloped roofs

A project at the Energie- und Umweltzentrum (e.u.[z].) Springe looked into strategies how insulation and sealing components can be installed in existing constructions to improve the best airtightness.

Evaluation of Indoor Climates Using the ‘Climate Evaluation Chart’

The indoor climate plays a key-role in relation to sustainable building. Often measured or simulatedtime series are used for the evaluation of indoor climate performances. Analyzing these data might bea problem due to the lack of proper visualization tools. In this paper, we introduce a new way tovisualize long-term (seasonal) and detailed (less than 1 hour) measured or simulated indoor climatedata compared to demanded criteria in a single chart: the Climate Evaluation Chart (CEC).Furthermore, the use of CECs is demonstrated by two case studies: (1) Preservation priority.