Changed my life! – I developed allergies last year and have been struggling, lots of painkillers and antihistamines. I'm allergic to dust and animals. I ordered this in the afternoon and it came the next day - I live in semi-rural NSW so this is impressive. I can't overstate what a difference this unit has made. I have not had to take anti-histamines since I bought it and as I have my dust allergy under control I am able to ride horses again and only have a mild and perfectly manageable reaction. It's also whisper quiet. Thank you so much AusClimate