After three weeks of use I can say that I am very satisfied. As a skin and respiratory allergies I have now even at home big problems. The dog I had to do away already, but the cat (17 years old) is under "conservation" and my wife always brings home from work a "cloud" of dust from laser printers. Now in winter the problems caused by the dry heated air and constant heat flow were particularly bad. I was thinking to install on the floor a ventilation system, but that would be quite a bit of effort and the filters used were also more than F7. After a long search, I then decided to use this purifier. By the HEPA filter and the UV lamp from the air cat allergens, many toner particles and germs is cleaned. The size and air circulation the unit is large enough for our house. Hours, I let it run in the hallway and in the bedroom, otherwise it is in the sensor operating in the parlor. Works beautifully. Who needs the device even at night in the bedroom: sleep mode is really hard to hear and the only one still luminous display can be masking with dark tape.
