A:Answer The filters are typically estimated to last about 6 months, with the lifespan dependent on the current air quality and how often the unit is run. You may or may not see buildup on the filters themselves. In some cases, they may look very grey or dusty—in others, the particles may be microscopic and invisible to the naked eye. Either way, changing the filters after about 6 months of use is encouraged or at your own discretion. This model requires an LV-H128-RF model replacement filter.
