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Figure 4.1. Rais sing the Quality y of BEEC Requ uirements in Ge ermany
Source: Erhorn 20006.
Research and developm ment of impro oved technolog gies and intro oduction of voluntary labells and standard ds such as low-- or zero-energy y buildings can n push both actual building g practice and th he tightening off standards. Figu ure 4.2 shows th he resulting decline in heatt energy requirrements and actual annual speecific fuel consumption in Germany. Figure 4.2. Evo olution of Building Energy Effic ciency Regulation in Germany
Source: Erhorn/Erh horn-Kluttig (2009).