I am looking for some advice regarding an air purifier. I been suffering from asthma for over 4 years now and it has become really bad now. I done some research and have come across various sites with non-medical treatments which was rather interesting as my medication don't seem to be doing any good. I am looking to get an air purifier but want to know what your thoughts are on this. Does anyone own an air purifier if so has it helped with your asthma? And if you do have one can you also let me know the model and brand you own.