The Sharp FZ-A80DFU includes two replacement Active Carbon pre-filters designed for Sharp’s FP-A60UW and FP-A80UW Air Purifiers. Each active carbon pre-filter removes odors, captures large particles and is effective up to 6 months under normal use.
I bought the Air Purifier for my daughters room. She has a litter box in her room. This prefilter work great on not only getting particles out of the air, but my daughters room also has no odors. We do have to change it every 3 months, but it works great!