Decisione live per Bristol. Aggiornata ogni 30 minuti.
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Bristol has an oceanic climate — mild temperatures year-round with persistent maritime moisture and more rain than continental cities. The advantage is stability: outdoor temperatures rarely create the extremes that make ventilation dangerous. The main challenge is humidity: on many days, outdoor relative humidity reaches 75–90%, and opening windows in warm, humid weather can increase indoor moisture rather than improving comfort. The key judgment is distinguishing temperature from comfort — 18°C at 85% humidity feels refreshing briefly but raises indoor dew point, risking condensation over time.
Summer evenings and nights are typically the best ventilation window in Bristol: temperatures drop to 13–18°C, Atlantic or coastal breezes lower humidity, and outdoor air is consistently cleaner than during daytime traffic hours. Winter ventilation requires burst opening rather than continuous exposure: the combination of cold (1–7°C) and high humidity means extended open windows bring damp cold air that costs significant energy to reheat. OpenWindow.live accounts for both temperature and humidity in its decision, flagging high-humidity conditions where ventilation should be limited or done briefly.
A Bristol, i momenti migliori per ventilare sono di solito al mattino presto (5–8) e dopo il tramonto, quando la temperatura esterna scende sotto quella interna.
Sì, nella maggior parte dei casi. Aprire le finestre può abbassare la temperatura interna di 2–5°C in 30 minuti se l'aria esterna è più fresca.
Sopra l'80% di umidità, aprire le finestre rende l'aria appiccicosa. Meglio aspettare ore più asciutte.