This air cleaner is amazing- barely humming quietly in the background, even the side filters capture dust and particles before they get into the main filter. The main filter is also very efficient, with my first one lasting almost a year before needing to be replaced.
Clark (that’s Blueair cleaner’s name) is doing a fantastic job of cleaning our air and keeping us informed as to how clean our air is. Therefore, replacing its filter is a regular way to keep Clark working great. Replacing the filter was easy and he continues his job as I write. :)
Blueair must be headed by a CEO who is either lazy or stupid. They've got a good product, but there are major flaws that no one at the company seems to care about. For instance, if you have a 5G wireless network, the Blueair filters will constantly go offline. Since their connectivity feature doesn't work, you might as well buy a much cheaper air filter that doesn't come with connectivity. They don't warn you about this and they don't seem to care that this central feature simply doesn't work. Another example is that you can set your address for your filters and the app constantly re-addresses your filters to your neighbor's address. This is a bug that could be fixed in the app, but no one at Blueair seems to care about it.
I have 3 Blue Air, the 7470i, the 411 and 200. They work GREAT! Very quiet and the app is very easy to read and lets you know everything that's happening with the air in our home. These purifiers do a great job purifying are home and are very easy to maintain. We travel a lot in our state and we take the 411 with us when we are staying at hotels. "Love them"