Alen T500 delivers impressive HEPA purifying power and convenient portability in a space-saving tower design. Quieter and smaller than comparable tower units, the T500 cleans up to 500 SqFt of air every 30 minutes, efficiently capturing up to 99.9% of dust, allergens, aerosolized viruses, and pollutants particles down to 0.1 microns. On average the T500 filter's lifespan is 9-12 months, making it a long-lasting choice for those multi-use situations. Lightweight and easy to carry room to room, the T500 is the go-to solution for clean air anywhere. Ideal for dorm rooms, classrooms, and office spaces. T500 offers directional airflow, an optional ozone safe ionizer function, and a convenient timer, all made with ease of use in mind.