Enjoy cleaner indoor air day after day with a replacement 360° Glass HEPA Carbon filter from Dyson. Over time, the filter in your fan can get clogged up with microscopic pollutants, and even let unpleasant odours back into your room. It is recommended that you replace your filter when you’re machine alerts you, to ensure you’re getting the very best out of your appliance. The GLASSHEPAFILTER is suitable for a range of fans including, Purifier Hot Cool, Pure Hot Cool, Humidify Cool, Purifier Cool, and Pure Cool. It’s easy to replace too, so you’ll be breathing in cleaner air in no time.