Hamilton Beach True Air Allergen Reducer High-performance, low-maintenance air care that fits anywhere. With a permanent, 99% HEPA-grade filter, the Hamilton Beach True Air Allergen Reducer cleanses the air in your home without the added costs and hassle of replacement filters. The high-performance filter captures dander & airborne particles as small as 3 microns, making your surroundings a better place to breathe. Don’t let its compact size and ultra-quiet operation fool you – the True Air® Allergen Reducer can provide powerful air cleaning to large rooms up to 160 square feet, making it ideal for bedrooms, offices and dens. It’s not only compact and quiet, but it also works vertically or horizontally for maximum versatility.