Do not let the cold get you down this season, or the hay fever get you down the next. If you already own our Devanti Air Purifier, you can continue to breathe easy long into the future with our replacement Devanti Air Purifier Filter. The filtration system has four layers to effectively free the air inside your home from contaminants. The air first passes through the pre-filter that traps larger particles. The H11-grade HEPA filter removes 99.97% of household dust, allergens and other harmful particles as small as 0.3 microns from the air. The cold catalyst filter removes formaldehyde and bacteria. And finally, the active carbon filter gets rid of lingering odours so that you end up with clean air that is completely healthy to breathe. Go ahead a have a breath of fresh air with our air purifier filter, which will make your air purifier work as good as new.