Blueair - 311i+ Max
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Based on 1 year's data from Feb 7, 2026 How it works
Liked most:
276
92
"It’s is SO MUCH more quiet than the s7 it ramped up the suction power from 4000 to 19000 yet I can let it clean my office room while being in a call now."
"Extremely quiet compared to our last one to the point where we can have it running while my partner is in work meetings (besides emptying water and dust bin, but that is 10 seconds of loud x 2)."
"pads that lift on carpet so you can run it while the baby naps"
141
29
"They do a good job of removing smoke from the room."
"The thing I noticed most and love about is that I no longer have the smell of my upstairs neighbor cooking wafting in."
"The sensors are amazing. ... Yes whenever I cook or smoke they instantly kick on and work really well."
359
17
"I recently found out I have a bunch of allergies- including my dog, so I got these Winix units to try and help combat the allergies. ... Within about 45 minutes of running one in my living room, part of my nose that has been clogged for as long as I can remember opened up. I’m breathing better than I have in years."
"I can tell you they really work. I have a mold allergy, and mold is literally everywhere in outdoor or indoor air with spores just waiting to land in a suitable environment for growth, but I have no symptoms at home with my two small Winix."
"They are also great to have during annual west coast wild fire smoke season and keep particulates in the house undetectable even when it has been horrid outside."
150
5
"this thing has been amazing!!! ... I have two kids with seasonal allergies and this thing has been amazing!!!"
"I have a levoit and it’s amazing. ... I have the large one in my bedroom which isn’t that big but I have 5 dogs and it alleviates so much dust. ... That’s the only room in my house that I breathe the absolute best in."
"it’s majorly helped w allergies and dog smell"
18
2
"They're incredible and the best thing is that they have this washable cloth sleeve (pre filter) that goes over the entire intake which happens to wrap all the way around. ... It does such a good job that the actual internal filter stays significantly cleaner and doesn't need to be cleaned or changed as often. ... It's a game changer."
"super effective kasi tuwing nililinis ko pre filter puro buhok ng pusa."
"It does an amazing job of capturing cat fur. ... I have to wash it every two weeks due to how much fur and hair it catches."
Disliked most:
0
17
"According to Shark, my air quality is a perfect 100% ALL DAY LONG. Even when: - My elderly Akita wanders by shedding fur like it's his job (and also pooting pretty non-stop) - I deliberately sprayed Lysol directly in front of it (for science!) ... The Shark? "100% perfect air, nothing to see here!" 🙄 ... But because it thinks the air is always fantastic, when I put it on auto/Eco mode, the higher fan rate is never triggered. ... It turned bright red, and said that the air would be clean again unless 60 minutes. It was back to 100 within a minute or two."
"I ordered 4 of these things and ALL of them sat off all day and night saying the air was perfect. ... All 4 of them did the same thing and would rarely come on."
"It's no wonder the filters last for 5 years, the thing never runs. ... They are not "purifying the air" if they are not moving the air through the filters."
30
42
"The air purifier is now unusable since I can’t replace the filter."
"the filters are expensive as shit"
"the filters are expensive as shit"
3
6
"I got upset when I found out my 4 levoit core 300 were not hepa lol."
"Levoit is a popular brand but they came under fire in the last few years, can't remember exactly when, for lying about being HEPA rated and/or no longer can claim to be or something."
"it turned out my models weren’t “true HEPA” as advertised."
1
3
"it has ‘electrostatic’ as well as HEPA-type filtration (they claim theirs is better). I understood electrostatic was the only thing that could actually clean the air like for gasses or VOCs, not just remove particles. Looking back and re-researching, it looks like anything electrostatic will produce at least some undectectable ozone. So, well I’ll-be-damn! I wanted to not have to worry about ozone!"
"it has ‘electrostatic’ as well as HEPA-type filtration (they claim theirs is better). I understood electrostatic was the only thing that could actually clean the air like for gasses or VOCs, not just remove particles. Looking back and re-researching, it looks like anything electrostatic will produce at least some undectectable ozone. So, well I’ll-be-damn! I wanted to not have to worry about ozone!"
"I don’t like they have an ionizer that you can’t disable. ... Ionizers create ozone, and when ozone reacts with different molecules it creates all kinds of new compounds that can’t be predicted."
14
12
"I think that having a pre-filter like that is the main problem because you have all these particles stuck to it which can become attached to anything or anyone that touches it ( for example pet's fur) and then they carry those contaminants everywhere again. ... I'm in Los Angeles so I got it because of the wildfires and possible asbestos but I'll be returning it because of this design. ... Yes now imagine it sucking all the bad particles from nearby wildfires, for example asbestos. Then a dog can brush their body through the fabric and carry it around until it gets lose in the air again ... I didn't even know the old design was the same way. How can they be rated so high in many websites? Even consumer reports has the of them. Now I even distrust CR"
"it was so poor at performance. ... With the Blueair, every month i have to clean the pre filters as they are caked in dust! I had the winx for a while and no once did the pre filters get any dust on them, despite it being left on 24/7. You could visibly see dust building up on its base, and around it but nothing inside it. ... but it wasnt strong enough to make it inside to the pre filters."
"It's no wonder the filters last for 5 years, the thing never runs. ... They are not "purifying the air" if they are not moving the air through the filters."
D3skL4mp 1.0You’ll typically see the same top-rated models across Wirecutter, Consumer Reports, and Tech Gear Lab: the BlueAir Blue Pure 311i+ Max, Coway Airmega 1512HH, and Winix 5500. The best choice probably depends on the size of the space you’re trying to cover. For my downstairs rooms, I went with two BlueAir units (the 311 and 211 models). BlueAir offers a 25% discount for teachers, military, police, and possibly firefighters (can’t recall for sure), available in both the U.S. and Canada. They also offer a 15% discount on filter replacements if you sign up for a 6-, 9-, or 12-month subscription. For my upstairs office/bedroom—since it’s a smaller space—I went with the Coway Airmega 1512HH and have been happy with it.
PhenomenalButterfly 1.0Our home is 1200 sq ft with two dogs. We have an Alen Breathesmqrt Classic Purifier in the main living space. We have a Blue Air 311+ in the bedroom and another BlueAir Classic in the master bedroom with an air quality monitor built in. You can notice a huge difference in our home, as we can create a clean room when needed during forest fires. We didn’t have these when the worst one came through Oregon. We love them and our allergies are so much better. We change the HEPA filters every 6 months or sooner. Our favorite is the air quality monitor to be sure everything is getting filtered properly.
SnooKiwis102 1.0The Blueair Blue Pure 311i+ Max is the best bang for the buck that I've seen.
Blueair Blue Pure 311i+ Max. Techgearlab.com top choice, also top rated by Consumer Reports.
ahsm 0.4I have the 311i max and I really like it. I never knew air purifiers could be so good. I always thought it was a scam until I used one and noticed the difference. I have one in my living room and when we fry onions or something similar it goes off right away. Never knew they had an app.
_sparklestorm 0.4Powered up my new Blue Pure 311i+ Max w/smoke filter this weekend and so far so good!
Xibbs 0.4I tried a few out and ultimately decided on the Blueair 311i. Control via homebridge and made a card for my dashboard. https://preview.redd.it/n7wu1a0kylje1.jpeg?width=1290&format=pjpg&auto=webp&s=1eaecfaf027c3dfbf0b23ca8015fdae95c1a7e73
AdvertisingLumpy1962 0.0We run 3 in our house, one in the main living area (diy pc fan with hvac filters), and one in each bedroom (blue air brand or something, I think). Also consider plastic on leaky windows (cheap sliders).
atav_ 0.0I bought the shark never change as my first purifier just recently and I feel the difference with my allergies. The 5 year filter change really attracted me but after reading here a little more I might need to change it more frequently. I also tried the blue air for my office but didn't like it, I didn't feel any difference and it was noisy, I returned it and got the smaller shark never change .
colonelcat 0.0I have a few Levoit the same size as this one. I don’t really care for them compared to the Winix and Blue Air ones I have.
digitalmatt0 0.0Love mine too. We got 3 and they’re holding up better than the Blue Air’s I got.
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