I have been suffering with COPD and shortness of breath for the last few years and heard about Salin® Plus Air Purifier so I decided to give it a go. I have to say that the results are amazing. I don’t suffer from the shortness of breath as much and my overall health is much better since using the machine approx 8 hours every day. I turn it on in my bedroom for 30 minutes before I go to bed and leave it on while I sleep all night.