After conducting tests, we found that adding a pre-filter will reduce the CADR. Additionally, if the pre-filter is not replaced in time, it will cause the purifier to be louder and effectiveness to lower. Since the pre-filter will add trouble to the user, we decided not to add a pre-filter in the Sqair.
Learn more about our range of simple, no-nonsense HEPA filters »
Free Guide to Breathing Safe
Want to learn more about protecting your health? Join thousands more and stay up to date on protecting your health.
Was this article useful?
