Theoretically, the photocatalyst does not deplete. However, in practical applications, the efficiency of the photocatalyst can be diminished by the numerous dust particles in the air that coat the photocatalyst's surface, thereby reducing its effectiveness over time.
LUFTQI has considered this in its design and optimized the system accordingly. The continuously rotating magnetic levitation fan is the main factor limiting the LUFT air purifier's lifespan. Its Mean Time Between Failures (MTBF) is designed for 40,000 hours If used 24/7, that is equal to 1667 days.