For Allergy Sufferers: Recommended for all individuals that want top of the line filtration of airborne particles, dust and allergens, who currently don't need gaseous chemical and odor control, but want to be able to upgrade when necessary. Applications - Mold spore control - Pet dander control (cat, dog, bird, etc.) - House dust mite allergen control - Pollen control - General indoor particle control Upgradeable to include gaseous chemical and odor control. One of the world's most efficient HEPA air cleaners in its class. Incorporates H12/13 class certified HEPA filter, normally used in multi-million dollar cleanrooms. This certification under the world's most stringent HEPA filter test, European Norm EN 1822, is the basis for this air cleaners' ability to capture up to 100 times more particles than conventional HEPA cleaners. In fact, while other air cleaners are rated only for particles down to 0.3 microns, IQAir systems have been found to remove particles down to 0.01 microns with close to 99% efficiency.