Do you have limited space for a large air purifier? If so, the Winix NK305 is a godsend. This tower model is compact so that it fits into any interior. You can easily use it via the Winix Smart App on your smartphone. The app indicates what the air quality is at home. You can also set a cleaning schedule in the app or review the air quality of the last month. The air purifier measures the air quality with the air sensor and adjusts the ventilation setting accordingly. The 3-fold filter removes allergens, bacteria, pollen, viruses, fine dust, and unpleasant odors from the air. The integrated ionizer ensures that the air is cleared of microorganisms. Even at night, the air purifier simply does its job. Set it to night mode and it cleans the air completely silently so you can sleep easily.Note: the filter has to be replaced when it becomes saturated.