Hydroxyls are naturally-occurring ‘radicals’ that can break apart almost any molecule including volatile organic compounds (VOC) and are often referred to as “the detergent of the sky”, keeping the air breathable and able to support human and other life forms. They are created in the upper atmosphere by the reaction of UV light with water and ozone.
In outdoor rural areas, hydroxyls are constantly replenished to a steady state of between 22-26/parts per billion (ppb) by the suns ultraviolet light . Outdoors in a polluted city, or in an indoor environment, the level of hydroxyls is zero. Producing hydroxyls in indoor living and working areas is intended to significantly improve air quality. “Fresher” air is safer and healthier.