This UV light bulb is used with a Titanium Dioxide (TiO2) filter to convert micro-organisms and pollution in the air into water and carbon dioxide. This process, called a photo catalytic process, helps remove harmful chemicals, such as those found in car exhaust, from the air. These chemicals are often a trigger for household allergies.

Requires replacement about 1 time a year. Like a standard light bulb the UV light will eventually burn out.