Blueair - Blue Pure 511i Max
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Last updated: Dec 13, 2025 Scoring
Liked most:
11
0
"the only ones whose fans have stayed smooth and quiet. ... i have owned 8 over 5-6 years at least without one single issue."
"the BlueAirs are the only ones whose fans have stayed smooth and quiet."
"Dead silent on the first setting"
14
0
"I personally have 2 blueair they work great I have 2 cats and my thanksgiving guests couldn’t smell them or their litterbox at all!"
"Both make a dramatic and perceptible difference in air quality. ... I can now paint my nails in the house and not choke out anyone who enters the room, or risk giving the cat (or myself) brain damage."
"happy to hear from guests our house doesn’t have a dog smell."
6
0
"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."
"The outer pre-filters do put up a lot of dust and I can throw them in the wash."
"Blueair imo because they have washable prefilters, and pet hair and dander is large and honestly doesn't need HEPA filters to clear it out the way, say, smoke does."
29
1
"We are a household full of asthmatics with allergies. We have 4 BlueAir purifiers and I cannot recommend them enough."
"has substantially lessened my seasonal allergy symptoms while in the house"
"I also have two cats and I definitely notice a difference in my asthma when I'm regularly running it vs. when I'm not."
10
1
"have had mine for years and run it 24x7"
"the only ones whose fans have stayed smooth and quiet. ... i have owned 8 over 5-6 years at least without one single issue."
"I’ve had two BlueAir for five years now. Love them."
Disliked most:
0
1
"the auto setting barely did anything unless I literally blew smoke at them"
"Their sensors suck"
2
4
"my only complaint is the filters are pricey and they’re often sold out during allergy and wildflower season. ... you can’t find them on their website or amazon or anywhere. ... and the generic ones are garbage."
"the larger sizes have significantly more expensive filters"
"Those filters are crazy expensive, so that purchase turned into quite the "investment"."
2
2
"Blue air is the best of the three, also isn’t HEPA but has a static generator which bothers some people."
"Although you'll find complaints it doesn't use a "real" HEPA filter"
"Blue air is the best of the three, also isn’t HEPA but has a static generator which bothers some people."
0
1
"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."
3
4
"OTOH, the two Blueair purifiers are on all the time and we have ***not*** noticed a decrease in the rate at which dust accumulates on the woodwork in the house."
"the auto setting barely did anything unless I literally blew smoke at them"
"Maalikabok pa rin kahit super sealed yung unit."
I have a Blueair 511i max for my room which is 11ftlong and about 7ft tall and about 7ft wider does a decent job but I still get back I got for my stuffy nose and the dust which is does quite good at reducing the dust but my nose still feels horrible any suggestions I usually run it on 2-3 speed
r/AirPurifiers • What air purifiers are good ->It’s fine. I have two. Plus a 211+. I don’t need the most perfect air purifier in existence I just need something that works well enough and it’s $800.
r/AirPurifiers • Blue Air 511 - Buyers Regret ->Unfortunatly, i had at Blueair 411 formabout 5 years in the bedroom. It just stopped working. So I replaced it with the newer 511
r/BuyItForLife • Looking for a high-quality air purifier that's built to last. ->BlueAir not having true HEPA and just a HEPA-type filter is fine. Multiple official testing sources show them pushing benchmarks similar to other true hepa rated units by popular brands. They still pull dust and still filter air just fine. They do have an ionizer and do produce extremely minuscule amounts of ozone. That’s why they’re certified. However, they are (especially the 511) weak units with a low CADR. If you want better performance, definitely return for a different unit or a stronger BlueAir model like the 211
r/AirPurifiers • Blue Air 511 - Buyers Regret ->I’m anti-Levoit right now after previously being a fan of their stuff - I had a Levoit Core 300 that developed a fan whine after a year. Went through the RMA process and they sent me a new one, which developed the same noise within a few months. I have several larger Honeywell purifiers throughout the house which have lasted several years, just wanted a smaller one for this smaller less-used room - been running a Blueair 511 in there for the past 6 months and it seems good so far, and very quiet.
r/CleaningTips • Get a HEPA (High Efficiency Particulant Air filter) for your space. ->Their CADR is in cubic meters per hour, where most purifiers specify CADR in CFM (cubic feet per minute). Multiple this by about .59 to change to CFM, so it's claiming \~250 cfm. (It's actually 264.) Most air purifiers at this price point (the blueair 411/511, the levoit core 200s) have a CADR of 100-150 CFM. 100 is actually sufficient for the room size (160 square feet) you're mentioning. If it's too good to be true and there's no information about them anywhere, then it usually is :)
r/AirPurifiers • Is this a little too good for the price? AirPlus KXY550 ->I mean.... I mentioned the part about them having no reviews and being at a sketchily low price point of 1/2 to 2/3 the cost of everyone else. There are really only a handful of air purifier brands that have demonstrated reliability, affordability, and effectiveness over several years, and don't dabble in post-apocalyptic/steampunk decor -- coway, levoit, blue air, winix. If you want to pay more, there's iq air, alen air, and a few others. For $110, you could have bought a blue air 511 and almost a 411, a levoit 300, almost a Levoit Vital 100s, or a Winix a231. The winix 5500, the coway 1512, levoit vital 200, and the blueair 311 are all at this CADR, but for closer to $200.
r/AirPurifiers • Is this a little too good for the price? AirPlus KXY550 ->i love my blueair. i have two cats, one is as floofy as they come, and it keeps up easily. the outside cover is machine washable and i wash it every time i do laundry. my only complaint is the filters are pricey and they’re often sold out during allergy and wildflower season. you can’t find them on their website or amazon or anywhere. and the generic ones are garbage. i’ve learned to keep a couple extra on hand.
r/homeowners • Best Air Purifiers for Pets? ->BlueAir Max Pure
r/BuyItForLife • The REAL best air purifier - I HATE DUST! ->Love my blueair - i have 3
r/BuyItForLife • The REAL best air purifier - I HATE DUST! ->We 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).
r/saskatoon • Air purifier ->I 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.
r/AirPurifiers • Is this worth the money ? ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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