Usage Note
Lüftungsschlitz is a narrow opening in a wall, window frame, or appliance casing that allows air circulation. Modern energy-efficient buildings use them to prevent condensation and mould without full window ventilation.
Examples
"Der Lüftungsschlitz am Fensterrahmen sorgt auch im Winter für frische Luft."
Natural Translation
The ventilation slot in the window frame ensures fresh air even in winter.
Literal Translation
The ventilation-slot at the window-frame ensures also in winter for fresh air.

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