This Aaira humidifier/purifier works for large room.  The water tank is large enough to last the entire night without having to refill. It uses the HOCl technology which uses salt and water to clean the air. I love the clean smell it produces like you know it’s working.
I had to used this when my son was sick and it was so quiet at night and kept stopped the spread of unwanted germs. This is really a great product!