Would anyone be able to recommend an Air Purifier?

[chocolatespiders]

My dd has Asthma and i would really like to buy one just not sure which model to go for, we have storage heaters which create dust which doesnt help dd chest.

many thanks

Just a query regarding air purifiers. We bought one a year ago and it was more for the white noise than anything else, my DD was addicted to noise. Anyway, she was an awful sleeper and I used to bring her in with me along with the purifier. I found that it really dried out my throat and chest and made me feel worse. Do we just have a rubbish air purifier or can they do this?