Providing continuous air purification, this permanently mounted unit is perfect for spaces without HVAC duct access. Features the same active air purification technology developed and used by NASA. Active Radiant Catalysis (ARC®), our proprietary photocatalytic oxidation (PCO) technology uses energy to activate a catalyst, turning moisture into products that continuously clean your space. Bipolar Ionization creates a plasma of electrical charges which removes allergens and other pathogens from the breathing space.