Blueair Blue Pure 311i Max Smart Air Purifier

Loving the quiet functioning . I love seeing on the app when it's getting cleaned and pattern recognition. You can set it to auto clean, or adjust the fan or set a timer to run. This has been helpful when I want to check how the air is in the area it is sitting in before I come out of my bedroom so I can clean the air before I move to that room. It has been helpful while having my windows replaced which was a nightmare for anyone, let alone someone with a compromised system.

Compact and quiet, also love the app. Unfortunately my cat likes to use as a scratching post (sigh), I'm so glad that extra covers are available for purchase. I will probably purchase another purifier for the top floor of my home!

App shows nice history of air quality measurements. Physical controls do take a moment to respond when first powering on, but otherwise easy to use.

I own a small condo. And management CMI let some smoke in their unit and I don’t smoke and I can smell people smoke in my unit. It just comes in from the dryer vent. These air filter machines work wonders. I went and bought a second one.

I have a 411i Max already so I purchased this as a second unit. These are such great machines, especially if you have dogs and/or live in a dusty environment. The air quality monitor is no joke, if a single puff of smoke is released into the room, you hear it kick onto high (mine are set to Auto) within seconds, then it quickly quiets back down once the air is clean. These are my first air purifiers and they have made a noticeable (others have commented on how much less 'doggy' my place smells) difference. Even the outside mesh gets visibly dirty and needs to be cleaned a few times in between filter changes, so I take the machines outside and take the outside mesh off and shake the dust out about every 3 months. This isn't a knock at all, it just shows how well they are working. The main filters last a really long time as well, about 9 months for me. I have a 1000sq ft 2-story home, with just one upstairs and one downstairs, I leave them on auto and only really even notice or hear them when I've had a puff inside and they kick on in the room I'm in.