The Breathe Easy In-Duct Air Purifier uses innovative Photocatalytic Nano-Mesh technology with ultraviolet (UV) light to improve your boat's air quality. The UV bulb inside uses specific frequency of light that produces no harmful ozone. The Breathe Easy nano-mesh is a three-dimensional foam structure coated with titanium-dioxide (TiO2) and provides 2200% more contact surface area than simple screen structures found in competing air purifiers. This is a significant advantage, as a photocatalytic air purification occurs only when airborne contaminants contact the photocatalytic surface. In addition, the TiO2 catalyst is restructured at the molecular level to hace an increased number of contact surfaces. This is information puts 70% larger molecules on the contact surface and dramatically improves reactivity with contaminants.