Live-Entscheidung für Paris. Alle 30 Minuten aktualisiert.
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Paris has grown noticeably hotter since the 2003 heatwave that claimed over 15,000 lives in France — an event that permanently changed how Parisians approach home cooling. The typical Haussmann building presents a ventilation paradox: thick stone walls stay cool well into afternoon, but poor cross-ventilation makes many apartments stuffy by evening.
The classic Parisian approach — opening shuttered windows at 6 AM and closing them against the afternoon sun — is physically correct and genuinely effective. The best ventilation window is 6–9 AM, when the Bois de Boulogne and Bois de Vincennes create slight cooling on the city's edges.
Île-de-France issues periodic "Épisode de pollution" alerts — days when authorities recommend limiting ventilation. These occur in spring (ozone) and winter (particulates from heating). OpenWindow.live integrates these data automatically into its recommendation for Paris.
In Paris sind frühmorgens (5–8 Uhr) und spätabends (nach Sonnenuntergang) meist am besten, wenn die Außentemperatur unter die Innentemperatur fällt.
In den meisten Fällen ja. Lüften kann die Innentemperatur in 30 Minuten um 2–5°C senken, wenn die Außenluft kühler ist.
Über 80% wird die Luft beim Lüften schwül. Besser auf trockenere Stunden warten.