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🌬️ Elevate your air game—breathe cleaner, live smarter.
The Blueair Blue Pure 511 is a compact, Energy Star-certified air purifier designed for spaces up to 432 sq ft. Utilizing exclusive HEPASilent technology, it quietly removes 99.97% of airborne particles as small as 0.1 microns, including allergens, viruses, and smoke. Its whisper-quiet 24 dB operation and customizable Scandinavian-inspired pre-filters make it ideal for bedrooms, offices, and nurseries, delivering fast, efficient air purification with minimal energy use.









| ASIN | B08KPJCDN6 |
| Best Sellers Rank | #2,267 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #11 in HEPA Filter Air Purifiers |
| Brand | BLUEAIR |
| Brand Name | BLUEAIR |
| Color | White / Dark Grey |
| Contaminant Filtration Capability | True |
| Control Method | Touch |
| Controller Type | Button Control |
| Customer Reviews | 4.4 out of 5 stars 5,246 Reviews |
| Filter Class | HEPA |
| Filter Type | Activated Carbon |
| Floor Area | 432 square_feet |
| Included Components | Air Purifier, installed filter, fabric pre-filter |
| Item Dimensions D x W x H | 7.9"D x 7.9"W x 13.9"H |
| Item Highlight | Compact, quiet 24dB HEPASilent filtration, AHAM Verified, Energy Star, Washable Pre-Filter, Captures Pet Hair Allergens Smoke |
| Item Type Name | Air Purifier |
| Item Weight | 5.2 pounds |
| Manufacturer | Blueair |
| Model Number | 3131000000 |
| Noise Level | 24 db |
| Number of Packs | 1 |
| Part Number | 109994 |
| Particle Retention Size | 0.1 micron |
| Power Source | Corded Electric |
| Product Dimensions | 7.9"D x 7.9"W x 13.9"H |
| Software Update Supported to Date | unknown |
| Special Features | Corded |
| Specification Met | Energy Star Certified |
| UPC | 689122023182 |
| Unit Count | 1 Count |
Z**A
Amazing purifier!
I love this air purifier so much! It works very quietly, and I can turn it on and off right from my iPhone. It comes with an app where you can check the quality of your air, and you can also see the air quality directly on the purifier’s indicator. It looks very nice and is also lightweight, so it’s easy to move around. I have two dogs, and I can definitely feel that the air is much cleaner. I’m also sleeping much better, and my sensitive eyes and nose finally feel better. Since I bought it, I haven’t even sneezed anymore! I’m really happy with this purifier and would definitely recommend it.
P**I
Compact, Smart, and Perfect for a Bedside Table
This compact air purifier has been an absolute lifesaver for my bedroom allergy flares. It is small enough to sit comfortably on a nightstand or in a tight corner, yet it keeps the air feeling noticeably crisp and clean all day long. Setting up the companion app over WiFi was painless, and it gives you a clear look at your actual indoor air quality in real time. The absolute best feature is the auto mode, which lets the built-in sensors monitor the room and kick up the fan speed automatically whenever it detects pet dander or dust floating around. When it comes to noise, it is practically silent on the lower night settings, meaning you can easily sleep right next to it without any annoying humming or clicking. While the marketing text claims it can handle up to a thousand square feet, it truly shines as a dedicated unit for a standard bedroom, office, or nursery where it can cycle the air constantly. The fabric pre-filter on the outside also does a fantastic job of catching heavy pet hair before it even reaches the main filter, making maintenance a breeze.
W**B
Powerful, Quiet, and Makes a Noticeable Difference in Air Quality
I recently got the Blueair Blue Pure 511i Max Air Purifier for my home, and so far it’s been working great. Right out of the box it was easy to set up, and after running it for a few days I could tell the air felt cleaner and fresher with less dust and airborne particles floating around. One of the strongest points of the Blueair Blue Pure 511i Max is how quiet it runs. Even on moderate fan speeds, it stays unobtrusive — perfect for bedrooms, living spaces, or any area where background noise matters. It uses Blueair’s HEPASilent technology to pull in air from all around the unit and effectively capture dust, allergens, smoke particles, and pet dander. It’s designed to clean up to around 926 sq ft of air in one hour, which makes it a solid choice for larger rooms or open floor plans. I also appreciate the filter performance — it feels efficient without feeling like the airflow is restricted. Although it’s compact, it doesn’t feel like a small unit; it feels like it’s doing meaningful work when it’s running. Several friends I’ve recommended it to have noted reduction in odor and pollen after a couple days of use. In short, if you’re looking for an air purifier that’s easy to use, effective, and quiet, the Blueair Blue Pure 511i Max is worth it. I’ll update with photos and a short video soon once I’ve had more time with it, but so far this has been a strong addition to my air quality setup.
T**E
Really cleans the air
I really like this BlueAir Air Purifier and have another one that I've had for years. It is effective at removing pet and cooking odors. It has a night mode that is ultra quiet. It looks good in the bedroom or out in the living room. Weight wise - it is pretty lightweight to move around. The only issue I have is that it randomly turns off sometimes. That is why it has 4 stars instead of five. I did trouble shooting based on the book and it turned back on. But it happened again today. I may have to send back and get a replacement - it may have a 'short'. I will come back and edit my video if I think it is something I'm doing.
D**N
Quiet, great auto-mode, and detects contaminants in the air and clears them away.
I have several older Blueair air purifiers and this one is just as quiet as all others. Works great on auto-mode, and the Blueair app allows you to lock out the top controls and change the brightness of the display and front LED. The fabric pre-filter is easy to remove and clean. Small enough to put pretty much anywhere. I have this one sitting on an end table next to my sofa.
S**N
Perfect Air Purifier!
The perfect air purifier for your bedrooms. I love that everything is controllable from your phone. You can customize all kinds of settings . It’s not loud or distracting. It looks modern so it fits in with any decor. You can set it to turn off and on when you want it to. The filter life is very long and best of all it detects when there are pollutants in the air.
A**J
Awesome, unobtrusive, quiet air purifier
Automatically detects when air needs more/filtration and adjusts itself accordingly. Super quiet, I am using it in my 5th wheel that I live in full time. My wife has the larger one at home that's amazing, which is why I bought this one. If you want much cleaner air to breathe, get this now.
R**T
Quiet, Effective, and Smart Enough to Just Let It Run
I picked this up mainly for pet dander and general dust in my bedroom, and it's made a noticeable difference. Within the first day or two, I could tell the air felt cleaner, and the auto mode does a good job of ramping up when it detects something and quieting down when the air's already clean, so I'm not manually adjusting settings all the time. The HEPASilent technology lives up to its name. Even on higher fan speeds, it's nowhere near as loud as other purifiers I've owned, and on the lower settings it's practically silent, which makes it easy to leave running overnight without it being disruptive. WiFi connectivity works well through the app, letting me check air quality readings and adjust settings remotely, which is a nice bonus if I want to kick it up a notch before getting home. Setup was straightforward and it paired with my WiFi with no real hiccups. Given the square footage rating, it feels appropriately sized for a bedroom or smaller room rather than something to rely on for whole-home coverage, and that tracks with how it's marketed. I keep it in my bedroom specifically and it handles that space with room to spare. My few hesitations keeping this at four stars: the filter replacement cost adds up over time, and the app occasionally lags or takes a moment to sync current air quality data. Neither is a dealbreaker, but worth knowing going in. Overall, a quiet, capable purifier that's earned its spot in my bedroom.
U**E
Efficace, silencieux la nuit, je l’adore, sauf pour le bouton du dessus
Le but de cet achat était initialement destiné à purifier l’air de ma chambre l’hiver, lorsqu’il fait très froid et que les fenêtres sont collées, ou à certaines périodes du printemps, lorsqu’il y a trop de pollen dans l’air pour pouvoir aérer. J’ai reçu cet article parfaitement protégé et avec un emballage du fabricant que j’ai trouvé astucieux. Une fois reçu, j’ai immédiatement mis en fonction ce purificateur d’air, afin de vérifier s’il était en état de marche. Mise en marche : Grâce au mode d’emploi redirigé aussi en français, la mise en marche s’est faite facilement. Je suis satisfaite d’avoir pu lire les explications dans ma langue (je suis francophone). En appuyant une fois sur le bouton situé sur le dessus, c’est le mode silencieux pour la nuit ou le repos; en appuyant deux fois, c’est le mode normal; en appuyant trois fois, c’est le mode à toute puissance. Observation de ce processus : Il n’y a pas de bouton qui semble s’enfoncer, donc parfois je frôle le dessus et je parviens facilement à changer de mode, parfois il faut davantage appuyer. Je n’ai pas réussi à comprendre où se situe le « capteur » s’il y en a un. Ce serait le seul point négatif que j’aurais à signaler. Pas de télécommande pour ce premier prix, cela me convient parfaitement pour ma chambre. C’est suffisant pour mon usage. Résultat de la filtration : J’ai laissé fonctionner le purificateur environ 1h ou 2h (durée au hasard), puis je suis retournée dans ma chambre. C’est incroyable la sensation de frais que j’ai ressentie! J’ai senti immédiatement la différence, au point que j’ai décidé de m’en servir encore dès maintenant (pas uniquement pour l’hiver), tant j’ai été contente, ravie et impressionnée du résultat. Usage en mode silencieux : Bien que je sois très sensible au bruit en général, j’ai dormi plusieurs nuits avec le purificateur d’air en action en mode silencieux. Et cela s’est très bien passé, à ma grande surprise. Mon confort respiratoire s’est nettement amélioré grâce à cet appareil. Autres modes : Le mode normal est supportable en journée, mais peut-être pas de nombreuses heures consécutives si la personne reste dans la pièce. Très bonne efficacité rapide. Le mode en toute puissance est très bruyant, donc à utiliser lorsque c’est temporaire. Personnellement, je l’ai utilisé lorsque j’ai changé mes draps pour les laver, tout en ayant aéré avant ou après. Si je l’utilise, je ferme la porte de la chambre. Par contre, bien que je sois ravie de mon achat, j’ai faussement cru qu’il y avait un affichage de la qualité de l’air avec un voyant lumineux. Je me suis mélangée avec les photos que j’ai consultées. Donc il serait souhaitable d’indiquer qu’il n’y a pas de télécommande, ni de connexion avec le téléphone, ni d’affichage de la qualité de l’air. Cet appareil me convient parfaitement, à ceci près que j’aurais peut-être préféré investir dans le modèle juste au-dessus qui a le voyant de la qualité de l’air. Conclusion : Je suis très satisfaite de mon achat, en dépit de la difficulté que j’ai parfois à savoir appuyer correctement sur le dessus (j’y parviens toujours). Selon notre budget, nous investisserons possiblement dans un second modèle de cette marque spécialisée, qui aurait un voyant indiquant la qualité de l’air. Je dois préciser quand même que j’ai choisi cette pour ses « compétences », et ce modèle parmi la gamme selon la superficie de ma chambre et le prix abordable du Vendredi fou. Bref, merci à la marque d’exister au Canada. Soyez bien alertes sur les comparaisons de modèles. Enfin, je dirais que ce modèle serait parfait dans une chambre, que ce soit pour un enfant ou un bébé ou des adultes, ou bien dans une petite pièce destinée au télétravail. Bon magasinage!
A**A
Buen producto
Casi no hace ruido, funciona perfectamente. Lo recomiendo.
M**.
Extremely quiet
Very quiet and does the square footage it says it will within an hour . Looks good too
C**O
We love this air purifier!
We got this air purifier a few months ago. My husband and I absolutely love it. Just to follow on what I’ve read in other reviews: The automatic mode works well. We didn’t know how to make it work first. But then, we realised we just needed to make sure the unit was on, and leave it on Auto mode, that’s it. The timer works well too. It Does the work, fairly silent and the air feels fresher. You can track PM2.5 from your phone, and even turn on or off the device as long as it is connected to your WiFi. On top of performance, the design id appealing. We love it!
A**R
No creo sea efectivo o al menos para lo que quería
No sé si puedo recomendarlo. Si se encuentra en modo automático casi no se siente el flujo de aire entrar y salir, aunque es evidente que hay polvo en el cuarto donde está ubicado. El prefiltro está muy limpio a pesar de haberlo usado diario durante más de un mes. Leyendo me di cuenta que detecta solo PM2.5 que aunque son las más partículas más graves, al no haber ese tipo de contaminación en la habitación , aunque haya polvo u olores el sensor no se activa para que funcione con más intensidad cuando está en modo automático. Vivo en una ciudad contaminada y checando los registros mensuales según este purificador la calidad del aire interior estuvo excelente en el 98% del tiempo. Cuando registró algún pico fue porque apague una vela justo a su lado y ahí si entró el sensor, lo que me dio idea de que no está dañado, simplemente así es. Si lo quieres para filtrar polvo no lo recomendaría. Comparo con otros purificadores que tengo en mi casa y a los cuales constantemente tengo que estarles limpiando los filtros y éste no se compara.
Trustpilot
2 days ago
1 month ago