



Price: $99.99 - $9.99
(as of Nov 27, 2025 16:32:31 UTC – Details)
Blueair’s most compact air purifier. Only Blueair air purifiers use HEPASilent™ technology quickly cleaning up to 432sqft space in 30min or 180sqft small room in about 12.5min.* The Blue Pure 511 air purifier combines plug-and-play simplicity with signature Blueair performance. Its compact footprint and low noise levels, makes Blue Pure 511 air purifiers ideal to place in a bedroom or office. *On highest fan speed. Clean Air Delivery Rate (CADR) based on AHAM AC-1. According to AHAM air changes per hour (ACH) is the measure of the outside air volume added to a space divided by the volume of that space over a set amount of time. **Sound pressure on low. A whisper is about 30 dB. ***Tested on PM 2.5 (0.1 – 2.5 microns) up to 90mins. ****”Light bulb” defined as LED light bulb with 40 watts energy consumption.
COMPACT FOR FRESH AIR: Only Blueair air purifiers use HEPASilent technology; Blue Pure 511 air purifier quickly cleans up to 432sqft space in 30min or 180sqft small room in about 12.5min*
POWERFUL YET WHISPER-SILENT: Ideal for bedrooms nurseries or home office with compact footprint and low noise levels; 24 dB quieter than a whisper on low and 49 dB on high
HEPASILENT DUAL FILTRATION TECHNOLOGY: Removes at least 99.97% of airborne particles down to 0.1 microns; The tiniest particles, such as viruses and bacteria, are captured, while larger particles such as dust, pollen and smoke are also removed
PERSONALIZABLE DESIGN: Our most compact air purifier seamlessly fits into your home with three Scandinavian inspired washable pre-filter colors; you can personalize your air purifier to match your interior; Arctic Trail dark gray pre-filter included
EFFICIENT AND COMPACT: Certified by Energy Star as Most Efficient model; Blueair air purifiers are whisper-silent and use less energy than a light bulb; Without taking up too much space enjoy fresh air with the touch of a button****
BLUEAIR REPLACEMENT FILTER: Blue Pure 511 Genuine Replacement Filter; B08KPFWBGM fits Blue Pure 511 Air Purifier and is designed for optimal performance
LET’S CLEAR THE AIR WITH BLUEAIR: Our Blue Pure Max air purifier comes with one filter preinstalled and a pre-filter for easy set up; This product is made for NORTH AMERICA USE ONLY and should only be used with input voltages between 110-120V
Air changes per hour (ACH): 4.8
13 reviews for BLUEAIR Air Purifiers for Bedroom Small Room Air Purifiers for Home Air Purifiers for Pets Allergies Air Cleaner, HEPASilent Virus Air Purifier for Dust Baby Air Purifier for Nursery Blue Pure 511
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$9.99

TheycallmeShorts –
I’m REALLY impressed with this
This Blueair air purifier is pretty amazing. I should preface by saying my husband and I are both indoor vape users. I was worried an air purifier wouldnt be effective because of this fact. Add in that we have two large dogs and 4 indoor cats. – Blueair proved me wrong.So I bought this unit in May 2025. It’s now the 20th of November and the filter JUST turned red promoting me to replace it!!! Holy cow! That’s an amazing value and effectiveness!! It made a huge difference this entire time with lowering the smell of dog and indoor air pollution I could constantly smell in this home of ours.We have an older home with fixed windows, add in the 4 indoor cats and the inability to leave the doors open to let in fresh air regularly thanks to the constant Florida heat and humidity, and I was always feeling like the air was just stale and gross in here, even before the vaping came into account. But this air purifier has been a game changer. It was so easy to set up, so easy to maintain and clean (both regular maintenance and with washing the exterior cloth filter) and replacing the interior filter took no time at all.Highly recommended product!!
Bill Richards –
Small, but effective
I put this in my office where the air always felt kinda stale. Within a day the room smelled cleaner and less dusty. It’s quiet on the lower setting, just a soft hum. The only thing I’d change is the power button is pretty sensitive and not extremely clear how to use. Not a big deal though. Good little purifier for a small space!
Glenn Paradise –
Cleared My 10′ x 12′ Office of Very Musty Air
Works great. Quiet. Easy set up and operation. Got it for a 10′ x 12′ office with very musty boxes. Cleared the air of that smell and nastiness. Breathing easy now.
Zp –
I think this is a good product
I have two of these I really like blue air. I also have a large one for my large room. I do have an issue though that I can’t seem to resolve. I have one that even when I replace the filter and reset it it still stays red on top can somebody help me out with this
Tina Hawes –
Great for college dorms!!
College kids were staying sick so I purchased one for each kid! One has a dorm and the other has an apartment. They worked great at cleaning the air… you can see it in the filters! Highly recommend!
Ana –
So quiet you’ll forget it’s on!
This air filter is awesome, it’s so quiet we forget that it’s even on. It works very well for the size and overall is not an eyesore in the room.
Teresa –
Great product!
These are incredible! Really helped with our daughters allergies!
Kyle & Melissa –
Buyer beware!!! Horrible customer service
Disappointed in BlueAir Warranty Support – Buyer Beware if Outside the U.S.I purchased the BlueAir 511 in late November on Amazon.com. It worked well initially, but within six months, the power adapter failed, and the unit stopped working. Since the product comes with a 1-year warranty and was sold by BlueAir and shipped by Amazon.com, I expected the issue to be resolved quickly and easily.I submitted a warranty claim, and everything seemed to be moving along—until I mentioned that I live in Bermuda. From that point on, all communication from BlueAir completely stopped. I followed up multiple times with no reply. I even called and was told the issue would be escalated and that a supervisor would contact me within 24 hours. It’s now been over a week, and I still haven’t received a response.It’s incredibly frustrating to be ignored after following all the proper steps. If BlueAir refuses to honor its warranty simply because of where a customer lives—even when the product was purchased through official channels—then that should be made clear upfront.I’ll be sharing this experience wherever I can to help other potential buyers make an informed decision. The product may be good, but the lack of accountability and poor customer support is a serious red flag.
Inna –
Nice filter, works very good
Richard Morin –
…..when you walk through the air cleaner isles of the major supply stores….out jumps the same old same old Brands…..you may have tried many of them as I have…..Blue Air made in Sweden has helped me breathe well in times of smoke from forest fires….dusty winds entering through windows….normal household living…inadequate air cleaning done by your furnace etc……..I have 3 different models….small room…..medium square footage to large square footage….when you remove the outer fabric…and wash the pre-filter as instructed….change your inner filter as indicated by the units warning light….get ready for having these units around for a long time……quite is the big sell….don’t go with a small unit if you want your bedroom to have the ultimate good air….big mistake as a small unit on low just doesn’t make sense….medium sized or larger on low is silent but it moves more air……….the big sell is the units fan head on top the unit….years of use on my units….clean as a whistle to date…why…nothing gets through…other named Brand units get filthy after 6 months….BLUE AIR simply the best….Tina Turner
CC –
I am glad I purchased this air purifier on Prime Day. It is on the pricier side however, I am impressed by the performance so far. This air purifier has a lower setting that runs quietly which works well in the bedroom. The size of the unit is on the larger side compared to my existing air purifier but overall, the look of it is modern and sleek due to the design and the removable fabric wrap. So far I’ve been using it for almost 2 weeks and it seems to be working fine and I haven’t had any uptick in allergies.
shyla –
I am hoping that I do not have to use this for at least 6 months. So it arrived on time. yesterday, package was new and it arrived before I got the air purifier itself which just arrived this afternoon. Being that it is the manufacturer product, I would assume it will fit no problem and it really all depends on how well the air purifier I just received works. If the air purifier does not seem to be doing its job then I obviously will be returning both packages together. If need be will update in a week or so. I simply ordered this to have on hand when the need to replace the filter arises.
shyla –
The one I really wanted was the 311 but price point etc, so I got this one. It literally just arrived today brand new in the box and very simple to basically plug n play. Will update if I feel the need to return, but so far so good, its is on and running in my bedroom, will see if I sleep better tonight with it running since it arrived. Will update after a few days with my verdict on this smaller unit. Wildfire season here has started, so far no smoke in my area, but just judging with the number of fires already going, it is just a matter of time to see how well this air purifier will work for that. But jsut for sleeping and being less stuffy in the morning would be pretty awesome too.UPDATE MAY 8 2025only been a day, but it was in my bedroom running all night, definitely quiet, no blaring lights that stay on all night long that will keep you awake and even though just one night, there was a significant difference in my breathing/stuffy nose when I wake up, barely there. Now I did do some major dusting with ceiling fans that were quite bad for dust just before bed so waking up feeling as clear as I did seemed to be a really good sign