The NQ Clarifier air purifier is in a class by itself. With its five-stage, hospital-grade filtration process, it absorbs a wider spectrum of allergens, gases, viruses, and bacteria than any other air purifier we offer. NQ Clarifier air purifiers include germicidal ultraviolet lamps to eradicate bacteria and viruses. The NQ Clarifier purifies air with 2 recognized processes: FILTRATION - Four stages of mechanical filtration: - 10