Obviously closing the windows is the most effective but if you have to balance outdoor pollution against vocs or co2 indoors it is possible to get some ventilation and significantly reduce pollution.
Air purifier while windows open.
With only 1 window open there is some external air entering the room but the purifier can at least work with marginal efficiency.
Doors opened or closed it does not really matter.
Create a stronger cross draft by opening windows on opposite sides of the room if possible.
Air purifier windows open or closed.
While still at it the purifier the air in the room will not be as clean because contaminated air will still be getting into the room while at the same time some of the purified air will be escaping out.
With 2 or more windows open often the air purifier will have almost no effect.
Fresh air has pollen smoke and other potential irritants.
If you can open a window in a room while the air purifier is working it is not a bad idea to mix in a little fresh air as well.
Humans pets air conditioning and heating systems and open windows are all responsible for introducing contaminants into a room.
Is going to be subjective.
I have allergies so i use an air purifier.
Fresh air also has oxygen which you need to breathe so you need to strike a balance.
Even with a window open air purifiers can still meaningfully reduce particulate air pollution in the home by 60 in 20 minutes in our tests.
While air cleaners often include filters they are overall more robust in cleaning the air than air filters.
My partner likes to open windows to get fresh air.
The bottom line to the question.
You should consider opening your window if you aren t using the air filter or if you re only doing it for a short period but only if the outdoor environment is in relatively good shape and you have a reason to.
It is a common misconception that operating an air purifier for an hour or two in a room will sufficiently clean the air.
Regardless most companies will use the terms air cleaner and air purifier interchangeably.
However the only limitation here is that the performance of the purifier in a room with open windows is less than one with closed windows.
The air purifier is going to clean the area it is immediately contained to regardless.
However how effective the air purifier is depends on both the purifier itself and the pollution level of the air.
New particulates swirl around in the air all the time.
It would just be a matter of how much would come in if the windows were closed.
If you have used chemicals or have a source of bad quality of air like burning.