When it was cold, Blumenstr., Munich

When it was cold

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Blumenstr., Munich

Two weeks ago temperatures fell below -10°C (14 °F), and while this did not stop me to commute by bicycle, the windows in my office showed their age: In new buildings, high-level insulating windows are obligatory since decades now, but 50 years ago simple non-evacuated 2-pane window glass was standard. At least they gives nice frost patterns.

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