24+ hours and 48+ hours? | Dyson Community
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Hello, As its been so hot, I left quite a few of the Dyson room fans on at one of my place since yesterday afternoon so the house is fresher for the guests arrival. Do you think it will be safe to keep them on for 24+ hours and 48+ hours? Or better to switch them off? 

I have a few Dyson Cool Tower fans and a few DYSON Pure Cool™️ Purifying Fan

Hi @mattmd,

Welcome to the Dyson Community!

Dyson purifiers are optimal when left switched on in Auto mode. This allows the purifier to constantly monitor your air quality, and automatically sense and capture pollutants. It adjusts the airflow speed, only purifying when needed.

However if you wanted to use your fans and purifiers in manual mode, running at a preferred fan speed, there wouldn’t be an issue with them running continuously in this mode either.

Hope this helps!