Filter replacements: Bissell recommends replacing the air filters every single 3 months, and the method is not hard and intuitive. OEM replacement filters can be obtained on Bissell, and generic replacement filters can be found on Amazon. "It is really ideal for a household room or studio apartment," states Greenwald, https://oxygen-concentrator-walma53851.ezblogz.com/57781091/the-5-second-trick-for-h2go-purifier