The TAB project demonstrated the energy and greenhouse gas savings that can be achieved with the various refurbishment measures for building technology in existing residential buildings (especially heating systems) and the building envelope. In doing so, it was emphasised under which politically controllable framework conditions the respective effects (can) occur. Two perspectives were adopted in order to scientifically analyse the savings effects and economic efficiency of the refurbishment measures:

Firstly, the micro perspective, i.e. the perspective of building owners. These represent the (potential) investors in more or less energy- and greenhouse gas-saving technologies and refurbishment measures and make their investment decisions under the given framework conditions. Secondly, the macro perspective, in which the energy and greenhouse gas savings effects were analysed from an overarching perspective that relates to Germany. This includes the perspective of political decision-makers who initiate and design funding programmes for heating technologies and refurbishment measures or who shape future energy prices through taxes and other policy instruments. From a macro perspective, it was also shown to what extent (and under what conditions) the energy and climate policy refurbishment measures appear achievable.

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