While this warranties a longer discussion, but in short, the best way to decide on which model suits your needs is by clearly understanding your needs.
This includes finding out – why you need an air purifier? Is it because of dust? smoke, allergens, bacteria or smoke?
Then comes how big your area which you want to cover. With big, we just do not mean floor area, but the volume.
Lastly, unique features, budget constraints and brand perception/warranties/ease of service etc. also play an important part.
These are difficult things to find when you are limited by time, therefore, we have done the heavy lifting for you by reviewing the best air purifiers across brands on the above parameters for you.
So, go ahead and find the right one for you!