I have been looking around for a decent air purifier in Hong Kong and from what I see only two choices are really worthwhile. Either IQ air or Alen air purifiers.
I am thinking of going with the Alen brand at http://www.renaudlifestyle.com/ because test results clearly show that it performs equally to IQ air at less than half the price. Does anyone have any other suggestions?
http://www.air-purifiers-america.com/ed_APA_test_results.asp?linkid=leftMenu