Filter replacements: Bissell suggests replacing the air filters every single 3 months, and the process is a snap and intuitive. OEM replacement filters can be found on Bissell, and generic replacement filters are available on Amazon. The bottom line: For many who are willing to splurge on the durable purifier https://bookmarkstime.com/story17103876/how-much-you-need-to-expect-you-ll-pay-for-a-good-clarion-air-purifier