Air Purifier by Guardian Technologies. The GermGuardian 3-in-1 True HEPA Air Purifier is perfect for allergy sufferers. With a True HEPA filter, it captures 99.97% of dust and allergens as small as 0.3 microns in size. According to the American Academy of Pediatric Allergy and Immunology, doctors recommend HEPA air filtration to reduce exposure to indoor asthma triggers. More than just a filter, the UV-C light kills germs, while the charcoal filter captures odors. Standing 55.9 cm (22 in.) tall, it is lightweight and ideal to use in both small to medium rooms. The easy to use controls include UV-C control and 3 speeds, including a low speed that runs ultra-quiet. The simple, stylish design looks great in any home environment.