HoMedics AR-NCFL1 Brethe Air Cleaner with Nano Coil Technology Replacement Filter Removes 99% of airborne contaminants like allergens, smoke, pollen, dust and germs Weighs 50% less than comparable HEPA towers; Uses only 25 watts of power - 50% less than comparable HEPA towers 120 CADR; Triple filtration and elimination process; Reduces airborne viruses and bacteria Cleanable, replaceable filter lasts up to 18 months Compatible with HoMedics Breathe Air Cleaner model AR-NC01 and The Sharper Image Brethe Air Cleaner model EVSI-XSFL