Can the Windows Be Opened When the Purifier Is in Use?

The windows have to be closed when the purifier is in use. This way, outdoor pollutants won’t affect the effectiveness of the purifier and in turn, increases the HEPA’s lifespan. For ventilation, the windows can be opened for 15-20 minutes so that the air in the house will be changed once. After closing the doors and windows, the air quality will quickly return to the safe range when the purifier is in use.

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