Aside from the fading sun and the cooling air, the stark difference between the warmer seasons and the cooler times of year is the lack of comfortable natural ventilation. It's easy to keep the windows wide open in the summer, but this task proves difficult as the year begins to wind down.
And while there are rules like end-of-year rules, like how often you should open your windows in winter, healthy autumn window etiquette tends to go forgotten. But I just discovered the German practice of lüften that will keep you mindful of the air quality in your home.
