Power consumption in Austria increases continually. In 2010, 4% of electricity is wasted by stand-by consumption in private households. The European Union has recognized this problem and passed regulations aimed at reducing the stand-by consumption of electric appliances. Some of these regulations are already in force, others are still to take effect. In this thesis, measurements of the stand-by consumption of different technical appliances in households and office buildings were analyzed. Based on these measurements, a computer model was designed for the years from 2005 to 2030. The number of appliances in use was assessed with the help of Statistics Austria and the German Office of Statistics. The model scenario for the different appliances is based on the respective sales figures. Where they were not available for Austria, data from Germany were used. The number of appliances in use was computed based on the lifetime of the different devices. Two scenarios were analyzed and calculated in the model - a trend scenario and a positive extreme scenario. In both scenarios, the stand-by consumption for consumer electronics decreases significantly thanks to the EU regulations - the model shows a very low, constant stand-by consumption from 2020 onward. With coffee machines in households and offices, a significantly lower stand-by consumption is discernable only in 2025, since the EU regulations in this area came into effect only in 2015. With kitchen appliances in households, which have a long life span, a considerably reduced stand-by consumption can also be seen only from 2025. In the trend scenario for WLAN routers in households, a great potential for savings can still be discerned. In this area, the European Union must urge for a future reduction of the stand-by consumption. One possibility to achieve this is shown in the positive extreme scenario, by limiting the time of activation of the WLAN function. Office equipment is not subject to any EU regulation. However, there are voluntary industry guidances available, suggesting that the stand-by consumption of non-regulated devices, such as laser printers, which is still high, can be minimized. With many devices, the stand-by consumption is already very low, however, the EU regulations need to be adapted constantly to new products, ensuring that it will be reduced also in the future.