I received this Air purifier by DH Lifelabs complimentary from try it sampling. I have been using this for a few months now to help eliminate pet odors, dust and germs that accumulate in my house.  Since using this, the atmosphere smells fresh and clean. There is less dust that accumulates on furniture now. This air purifier also has a humidifier built in with it, which is great. We notice less static electricity, sore throats, and dry noses. Having an air purifier in our home helps kill germs, odors and bacteria. This is simple to use and maintain. Great product for any room, especially large areas.