Estimated Usage Period: Approx. 2 years* According to the Japan Electric Industry Association Standard (JEM1467). When you vacuum 5 cigarettes per day, [Deodorization] The odor removal rate is half (dust collection) The number of years before cleaning the air is twice the early time. The deodorizing and dust-collecting integrated filter is intended for use by those who are early in time to replace them. Replacement time may be faster, depending on the conditions of use.