Probably the only good thing about these filters is the price. They tend to be snug fitting, which means the device can be difficult to put on and take off. But the biggest problem I had was that they don't last as long as OEM filters. Around the time the app reported that 75% of the filter life was left, the machine showed an "Eβ error on the display. This usually happens when the filter is clogged and restricting airflow. If I turn off the unit, remove the filter, take it outside and tap some dust out of it, then put it back in, it gives me a few days before the error comes back. Eventually this workaround will become less effective and you will have to change the filter entirely. Because of this, I had to go through both filters in this pack in less time than the OEM filter. Sure, you'll save a lot, but they don't seem to work as well as OEM filters, so I don't think they're worth it.
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