When the RED LIGHT shows on your Crystal AIre Hepa Purifier then you know that it is time to replace the filter. This should generally be done every 6 months. Your filter can be cleaned with a vacuum cleaner once a month. The Spare filter for the CF-8128NUAS-1 Hepa Aire Purifier. It is made from layers of small, sticky fibreglass fibres that are interwoven. They remove 99.97% of dust, pollen, mould, bacteria and other airborne particles that are larger than 0.3 microns.
