TiO2 Photo-Catalytic Replacement Filter 7013F by Sunpentown Uses Titanium dioxide to create UV light that destroys germs Can be used as just a fan to help air flow Has two fan speeds to cover your room faster Love your Photo-Catalytic Air purifier? Remember to replace the filter every 6 months to keep optimum performance from your air purifier with the 7013F from Sunpentown. The photo-catalytic filter is necessary to continue to clean bacteria and viruses from your air. The photo-catalytic replacement filter 7013F will create a UV light from Titanium Dioxide so help keep your home free from germs. The 7013F will keep your family breathing. Can be used as just a fan to help air flow. Has two fan speeds to cover your room faster. Dimensions: 11 x 5.5 x 13.