Why is it that the fine dust level of the air purifier is not going down completely?

Even if the fine dust level of the air purifier goes down to around 30, it'll go up again soon.

If you turn it on because it's weak, you can turn it on almost all day.

663 2018-12-02 Gentleman

It's because the house isn't completely blocked

Gentleman 7 years ago 0

Even if I close all the windows

Gentleman 7 years ago 0

Even if you close all the windows, it's not completely sealed
The wind kept coming in from everywhere

Gentleman 7 years ago 0

Even if you close all the windows, it rarely gets completely sealed
I think the fine dust level is high, but I think it's leaking a lot

Gentleman 7 years ago 0

I see. I'll just have to keep playing it
Thank you.

Gentleman 7 years ago 0