This bachelor thesis addresses the consequences for existing buildings if the district heating sector implements low temperature district heating. Since up to 40 % of the existing single-family buildings have been built in the period 1960-1979 the emphasis of this report will be on that specific type of building.
It is shown in this report that if the district heating temperature set is changed from 70/40 °C to 55/30 °C the heating power output of the radiator is reduced to 55 % of the original heating output. Furthermore it is evaluated what changes there have to be done on the building envelope to compensate for this power loss, and what the consequences will be for heating of the building if nothing is done on the building envelope.
Based on the created models and assumptions in the report it is concluded, that it is only in a limited period that the heating demand of the building cannot be fulfilled. Thus, there is basis for the district heating sector to commence the transition to low temperature district heating, since it only will cause limited inconvenience to the consumer.