Clean Air from Above Designed to Integrate into Open Ceiling Spaces Fellowes 3-in-1 filter (prefilter, carbon and H13 True HEPA filtration) is 99.95% effective in capturing molecules as small as 0.1 microns including viruses, allergens and germs and is designed to last for one full year Array Ceiling's energy efficient design includes our unique mixed flow fan, designed to maximize air flow while delivering quiet operation Suspends from ceilings as high as 20’