This is a good multi-purpose, compact air purifier for a single room approximately 186 sq. ft. During our testing, it significantly reduced the particles in the air and its fan is quiet enough on low to use in a bedroom while sleeping. It is very simple to use with a manual knob fan control and push button UV light option. This would be a great solution for allergy sufferers looking for an affordable air cleaner that is easy to maintain. No frills, bells or whistles, just a good all around air purifier to help keep your breathing air clean, healthy and free of airborne germs, viruses and bacteria.