In addition to this Blueair, I also have a Philips 2000 air purifier. The Philips was mainly used for dust and HEPA filtering, but did little for the backburning smoke that Sydney experiences every summer. I have found that Blueair does the opposite, and that it does a good job (if not expensive) job at reducing smoke smells, but does not do much for dust particules (the filter area is smaller). But that's okay, both have their strengths and weaknesses and I do plan on using them in tandem.

Despite spending so much on this air purifier, I was sceptical as to how much difference it would make, but my daughter's asthma was getting worse and I thought it was worth a try. The quality of air in her room now is unbelievable. We have an elderly cat that spends a lot of time in her room, and even the cat odour disappears when the unit is running. I am amazed at the difference.