This was recommended by a doctor friend of mine because the air at night seems so different from the air during the day. I just couldn't sleep with the difference in day and night air quality.
Once we added the Ionic Air Purifier to the room, it made all the difference in the world.
Before going through a host of medical specialists and then allergy tests, and spending all kinds of money on doctor bills, give this system a try. It costs initially but it will save your lungs in the long run.
The Ionic Full Size Air Purifier is awesome.
I had one of these and intend to buy another one. The item was in my car when I was relocating and whtile spending the night at a hotel my car was stolen. So... I don't have it anymore.
It worked wonderfully and was very easy to operate and clean. Where I lived had a lot of dust and every week the purifier was loaded with residue.