This paper presents an analysis of indoor climate in buildings with forced air heating systems. The results is based on indoor climate measurements and extensive interviews with the occupants. The analysis shows that design criteria is of great importance for the occupants conceptions of thermal comfort in buildings with air heating systems. Forced air heating systems could be a way to provide mechanical supply air with less problems with the thermal comfort, such as draught, than in ordinary supply- and exhaust air ventilation systems.
The importance of the climate to general health and wellbeing has long been understood. The ultimate goal for planning, building, renovation and administration of the housing stock is to satisfy people's needs. When this goal is not attained, the results will be human sacrifices, social problems and losses to the national economy. This, of course, also applies to the issues of climate and the environment. Research and development work on these questions is nothing new for the Swedish Council for Building Research (BFR).
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