It was a bad day for postmen. Mirko Seidenberg had to trudge through the rain in Berlin-Mitte for hours. Now he just wants to get warm quickly, in his semi-detached house in the surrounding area. But before he finishes work he has to get rid of something. Because Seidenberg doesn't know whether he can still look forward to a warm home in winter. "It pisses me off," he says, explaining what's going on.