Blueair Blue Pure 511i Max HEPA Silent Air Purifier for Small Rooms up to 926 sq. ft.
Highly rated
$111.99
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- $35.98 - $50.99reg $59.98 - $98.32 Sale3 out of 5 stars with 2 ratings
- $83.99reg $149.99 Sale4.8 out of 5 stars with 5 ratings
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Guests are saying
The Blueair Blue Pure 511i Max air purifier impresses guests with its sleek design, quiet operation, and effective air purification capabilities. Many guests have noted significant improvements in air quality, especially for those with allergies or respiratory issues. The app connectivity allows for easy control and monitoring, making it a convenient choice for any room. While some guests mentioned the need for more frequent cleaning and occasional issues with the Wi-Fi setup, the overall performance and aesthetic appeal make it a highly recommended product.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.6 out of 5 stars with 250 reviews
41% would recommend
12 recommendations
1 out of 5 stars
Thumbs down graphic, would not recommend
15 April, 2026Verified purchase
4th try not a charm
Made a metallic internal clicking noise that was made worse on the lower settings.
1 reply from Blueair Support Team team - 21 days ago
Thank you for your review and for sharing your feedback about your Blue Pure 511i Max air purifier. Blue Pure Max air purifiers are designed with a built-in noise shield to trap the sound frequency from the fan motor vibration for whisper-quiet operations on low or a gentle hum on the highest fan speed. If you’re experiencing a clicking noise, please reach out to us for assistance here: https://www.blueair.com/us/contact-us-page.html
5 out of 5 stars
5 April, 2026
originally posted on blueair.com
Very quiet
This seems to work--when I clean the litter box, the air cleaner nearby speeds up to clean the dust from the air. We'll see what happens if it's a smoky summer.I originally bought a larger model for my bedroom, but then bought this smaller one for the bedroom and moved the larger unit into the great room.
5 out of 5 stars
5 April, 2026
originally posted on blueair.com
Noticabk difference
Hands down the best air cleaners I've ever had.... And I've had a lot. I wish I had known about these before I bought anything else
3 out of 5 stars
Thumbs up graphic, would recommend
1 April, 2026Verified purchase
Filtering works, air quality reading not reliable
We bought this item after we discovered mold in the basement and our infant already has respiratory issues so it’s in his room. It runs well and silent, but the air quality reading is not accurate. It has constantly been saying the air quality is excellent and at a 0, but we feel the effects of the mold particles when we re-enter our home. We know it’s not a solution to the mold, (we have removal scheduled, so just managing for now) but it shouldn’t say it’s excellent air when we immediately feel headaches and congestion come back. We do not use the auto option due to this and just have it constantly run. We bought a different air purifier for our larger living space and it right away said the air quality was poor. While I do trust it is filtering, the air quality reading is not reliable.
1 reply from Blueair Support Team team - 29 days ago
Thank you for taking the time to share your feedback. We’re very sorry to hear about your experience with the DreamWell and appreciate you sharing this. We understand your concerns, especially around cleanliness and safety. To clarify, opening the pump for inspection or cleaning does not void your warranty, and we apologize for any confusion. Regular cleaning helps prevent buildup and maintain performance. We'd really like to help make this right, please reach out to our support team so that we can help: please feel free to contact me at:https://www.blueair.com/us/contact-us-page.html
5 out of 5 stars
1 April, 2026
originally posted on blueair.com
Perfect and non-digital
Easy set up and real buttons to turn on, turn up or shut off, as well as ‘auto’. Wish the much larger 211iMax had been as simple to operate as this one.Highly recommend this one.
5 out of 5 stars
17 March, 2026
originally posted on blueair.com
Quiet and Efficient!
I have 2 Blue Air Air Purifiers... the 311i+ MAX and the 511i MAX and they are great! You can tell the differnece in air quality when you walk into the rooms they are in. I love that I can control them from the App. Even when on Level 3 (I have them both set on Auto) they are much more quiet than the Levoit I have in my bedroom. I can see another 511i MAX in that room soon.
1 out of 5 stars
Thumbs down graphic, would not recommend
15 March, 2026
So disappointing! Too fragile and poorly made fan assembly.
I bought one which was quiet enough for sleeping, however it fell off the night table and stopped working instantly. Way too fragile! Replaced it. First couple days it ran very quietly, then started making a faint plastic-on-plastic sound. Decided it just wasn't worth it. So sad, my family has owned BlueAir purifiers for about 20 years, most had metal cases, were quiet on low settings, super efficient on high settings, and built like tanks. So dissappointed.
1 reply from Blueair Support Team team - 2 months ago
Thank you for being a loyal customer and for sharing this feedback on the Blue Pure 511i Max. We are sorry to hear about the durability concerns and the noise you experienced after replacement. That is not the experience we aim to provide. If you haven't already, please reach out to our support team and we'll be happy to assist you further. You can contact us here: https://www.blueair.com/us/contact-us-page.html
5 out of 5 stars
12 March, 2026
originally posted on blueair.com
Air Purifier
Located in bedroom, seems to be eliminating dust and helping with my breathing.
5 out of 5 stars
9 March, 2026
originally posted on blueair.com
super quiet
my first time to purchase. uncertain how the filter replacement will go or when it is needed. time will tell on this aspect. running on the 1 so is super quiet. we have in our bedroom. all seems to be going well.
5 out of 5 stars
4 March, 2026
originally posted on blueair.com
511 MAX
Love everything about this air purifier. The application is very easy and helpful to use.
5 out of 5 stars
2 March, 2026
originally posted on blueair.com
Another Happy Customer
I have purchased several Blueair air cleaners, for different rooms, and have been very happy with the results. Allergies from pollen are already affecting people in Las Vegas now and the air cleaners are very effective in cleaning up the air inside my house. Thanks for a great product!
5 out of 5 stars
26 February, 2026
originally posted on blueair.com
timing was great
Had to have plumbers break up a 4 foot section of our concrete slab to fix a pipe. The dust was bad. The filters cleaned it right up. Had both the 311 and the 511 going!
5 out of 5 stars
23 February, 2026
originally posted on blueair.com
10/10
I have purchased a total of 3 of these now! They make the air feel so much lighter, especially living in the middle of country farming fields!
5 out of 5 stars
3 February, 2026
originally posted on blueair.com
Litter box
I placed my air purifier next to the litter box. Works well. The other day I waited until til the end of the day to clean the litter box and the air purifier fan went up on speed then the light changed color. Really cool to see it working well. Now I need to figure out what one i want next. Marmalade is a feral cat and hes not bothered by the purifier.
5 out of 5 stars
2 February, 2026
originally posted on blueair.com
High quality purifier!!
Imma be honest, I've had a lot of unreliable bad air purifiers for my house. At first, I had many doubts of the reviews of this Blue Pure 511i Max, but after one month of using this purifier, I have to say this right here, IS THE BEST CHOICE for cleaner air for your home! I currently have 2 for my living room and for my personal room, and I must say I always walk into my home with cleaner, fresher air!! This goes above and beyond my expectations for air purifiers and I will ensure I stay a loyal customer, Blueair!!
5 out of 5 stars
3 January, 2026Verified purchase
(no review title)
Very efficient and exceptionally quiet. It’s a perfect choice for bedroom or nursery. Lightweight & attractive
5 out of 5 stars
29 December, 2025
originally posted on blueair.com
Love it!
My air feels so much cleaner and I notice a drastic reduction in dust on my black furniture!
5 out of 5 stars
Thumbs up graphic, would recommend
20 December, 2025Verified purchase
(no review title)
Great size easy to set up very quiet
1 out of 5 stars
Thumbs down graphic, would not recommend
18 December, 2025
Auto Mode Limited to 2.5PM Particles
The product description is misleading because nowhere does it mention that auto mode only activates when the particle sensor detects PM2.5 particles. So if you’re concerned about smaller particles like smoke, viruses, and bacteria, which are PM1, this purifier won’t automatically filter them. I plan to return it.
1 reply from Blueair Support Team team - 4 months ago
Thank you for taking the time to leave a review. We’re sorry for the confusion and appreciate you sharing this feedback. The 511i Max filters are designed to capture particles smaller than PM2.5, including smoke, bacteria, and viruses. As you mentioned, Auto mode is triggered by the unit’s PM2.5 sensor, which adjusts performance based on those readings specifically. We understand this may not have been clearly communicated and apologize for any frustration. Your feedback will be shared with our team, and we encourage you to reach out to our support team and reference this review if you’d like help finding a better fit.
5 out of 5 stars
17 December, 2025
originally posted on blueair.com
Sized just right
Being the smaller unit, it is perfect for our primary bedroom - would purchase again