Ventilation: the situation in Switzerland.

Swiss topography is dominated by the Alps and the Jura in the north-west part and the most densely populated "Midlands" between the two. The climatic conditions vary in a very wide range both in temperature and solar radiation due to the different altitudes and the different climatic conditions north and sourth of the Alps.Accordingly there are roughly three climatic regions. Meteo data are available as hourly values from over 70 automatic meteo stations. Derived values for hand calcualtion methods are regularly published in Swiss technical journals.

Checking the performance of ventilation systems: the Swedish approach.

In recent years, poor indoor climate has increasingly been seen as the cause of health problems for building occupants. Today, there is good evidence in some areas why such problems arise. Unhealthy substances given off by various building materials, the existence of mould and general air pollution are the main causes. In general, the most important way to remedy the problem is improved ventilation. Poor upkeep and maintenance have led to a decline in the performance of existing ventilation systems.

Drawing conclusions from measurement programs.

This paper discusses some inference problems in measurement programs. The 1991 Swedish energy and indoor climate survey is chosen for the purpose of illustration. The Swedish survey is carried out within the research program "Conservation of Electricity in Existing Buildings" (ELIB), consists of three projects: 1. Technical characteristics of the Swedish housing stock; 2. Indoor climate of the Swedish housing stock; 3. Energy conservation potentials in the Swedish housing stock.

The climate in churches. Kyrkoklimat