Your purifier has a limited warranty of up to one year from the date of purchase. To extend the warranty to two years or more (depending on your model, check the product pages of your purifier for additional warranty specifics), you would have needed to complete the Product Registration form in the 'My Units' section of your customer account, within (60) days of purchase or register through the Blueair Friend mobile app. If this is not completed within 60 days of purchase, Blueair may deny your warranty claim for the second year of coverage.