So that ice patterns appear on the inner surface of the glass of the glazed balcony, should the window leaf from the room

So that ice patterns appear on the inner surface of the glass of the glazed balcony, should the window leaf from the room to the balcony be kept open or closed?

1. Open.
2. Water vapor contained in the warm and humid air of the room enters the balcony, where, in contact with cold glass, it becomes saturated, condenses and turns into ice.

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