The unit came packed well with me and could be taken fairly quickly in operation. The air purifier has three filters, the pre-filter and HEPA, - and activated carbon filter. The latter one has free before use of a film and the unit can be put into operation. The manual indicates that it should renew or clean the filter at different times. (Times are given). Front top left, there is a button on which you can set 3 different levels of air cleaning. The sounds that are this device by itself is really to endure very good, especially the night mode interferes in any way to sleep. The air cleaner has a sensor with which the quality of the breathing air is measured. A light in front of the knob shows in different colors representing air quality at red: bad, Violet: medium, blue: well.
The Allergy-friendliness of this equipment has even been tested and certified by the Centre for Allergy Research. It frees the air of airborne allergens such as pollen, dust mites animal hair and mold spores.
We have this equipment available in our bedroom for two days and I have since not stuffy nose and cough when getting up. Better proof of the effectiveness of this device does not exist for me.
Highly recommended !!!