The Sharp FZJ80HFU is a replacement HEPA filter designed for a Sharp IoT Plasmacluster Ion Air Purifier with Sharp Air App & True HEPA for Large Rooms (502 sq.ft.) (FXJ80UW). Your air purifier is only as powerful and effective as the filter you put inside, and Sharp’s replacement parts are essential for maintaining product performance. Each Sharp air purifier filter is designed specifically for a particular unit style. Not only will genuine replacement parts fit like a glove, but they also have the sleek and seamless design to match so that you can get the most out of your Sharp air purifier.