Filter replacements: Bissell recommends replacing the air filters just about every three months, and the process is not difficult and intuitive. OEM replacement filters are available on Bissell, and generic replacement filters can be found on Amazon. My practical experience: Putting together the system took only a couple of minutes https://thesocialroi.com/story6574907/how-much-you-need-to-expect-you-ll-pay-for-a-good-does-air-purifier-help-with-covid