Welcome to HepaPure, Specialist Store for Air Purifier Filter. Product Name: SHARP KI-N40 COMPATIBLE REPLACEMENT FILTERS Compatible For Filter Models: FZ-D40HFE / FZ-D40DFE / FZ-J1XMFE Product Feature: Quality PP + PET HEPA Filter removes airborne particles, pet dander, dust mites, PM2.5. Deodorising Filter removes harmful gases and bad odours. Humidifier filter wicks moisture from water tank and evaporates it into the atmosphere How to Install Filter: (Steps provided are for most air purifiers, if in doubt, we will be around to assist you) Ensure power is off. Remove cover from air purifier to expose filter. Remove pre-filter, wash and let dry. (if available on air purifier model) Remove old filter(s). Clean interior of air purifier with a towel Install new filter with pull tab facing you. (for easy removal in the future) Install pre-filter. (if available on air purifier model) Install Cover. Turn on power. Reset filter change reminder light (if available on air purifier model) Allow the air purifier to run for about 10 mins. If your air purifier model is equipped with a dust sensor, the sensor should indicate improved air quality after about 10 mins.