Iq air is the best one you can get... it is the brand hospitals use.
I would not get Dyson air purifier- I had it on and I woke up to black smoke everywhere and a burning electric smell. I'm not sure what happened Dyson as a company did not take it seriously or look into what happened. DYSON just replaced the product. The new one they sent stopped working and the one they replaced after that melted around where the air comes out. ( I have the hot and cold air purifier)