Blueair Blue Pure 511i Max Particle and Carbon Replacement Filter
$29.99
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4.8 out of 5 stars with 44 reviews
5 out of 5 stars
27 March, 2026
originally posted on blueair.com
Blueair 511i Max Purifier
This air purifier works well. It has very easy setup and is extremely quiet. I have used it exclusively on the Auto setting, so it increases air purification as needed; otherwise it runs on very low fan speed, which conserves energy. It is very nice that it can be controlled via WiFi connection to the app. The app affords even more settings to control the air purifier than just the buttons on the unit, which I find useful. This air purifier is definitely a quality device.
5 out of 5 stars
19 March, 2026
originally posted on blueair.com
LET SLEEPING DOG LIE
ME AND MY CORGI DOG SEEM TO BE SLEEPING BETTER AND BREATHING BETTER IN THE MORNING. WHAT A BLESSING. SO QUIET AND SO FAR SO GOOD.
5 out of 5 stars
13 March, 2026
originally posted on blueair.com
Right size for the bedroom
It’s quiet, especially on night setting. I like that lights can be dimmed. Works well.
5 out of 5 stars
7 March, 2026
originally posted on blueair.com
511i air purifier
I love my blue air purifier. It helps with dust, smells, and more!
5 out of 5 stars
2 March, 2026
originally posted on blueair.com
Better than expected
We didn't expect our filters to get as dirty as they did in 6 months, but have decided now we will be checking them in 3 months to decide how often we need to replace the filters.
5 out of 5 stars
26 February, 2026
originally posted on blueair.com
Love my Pure Blue
I have a Pure Blue 511i Max and I use it in our master bedroom. We do not have a HVAC return in that room so it keeps the air clean.
5 out of 5 stars
15 February, 2026
originally posted on blueair.com
Clean, Clean Air
Easy to replace old filter with a new one...and the change in air quality is noticeable. I use my purifier in a bedroom 13’ 6” by about 20’.
5 out of 5 stars
8 February, 2026
originally posted on blueair.com
My BlueAir
I like the units (3: 511 and 311 models)). They are quiet. Not sure how well they clean the air because when originally turned on all said the units were in air less than 2.5 micro. However, on one occasion in the couple of months owned smoke from my pellet grill entered the house and the amber-reddish light came on and the fan speed increased. After about 30 minutes it went back to clean air.
5 out of 5 stars
24 January, 2026
originally posted on blueair.com
Dust Sucker
Our air purifier in the laundry room near the kitty litter pan is kicking up the air purification to a level I didn’t know existed. When you see some dust, you think ... it’s got to be filtering some out, but once I cleaned the filter and saw the extent of dust and mini debris on the cloth outer shell, I was very surprised and impressed.
5 out of 5 stars
16 January, 2026
originally posted on blueair.com
Doing great on burnt bacon odor
Even though we have an overhead vent above our stove I often stink up the house when I'm cooking. The Blue Pure unit does a good job removing the smell. It's easy to tell with the color coded air quality indicator. The app is nice for keeping track of the filter 'health'. We still have quite a while before a new filter will be needed. I was concerned about having to replace it too often but that doesn't look like an issue.
5 out of 5 stars
17 December, 2025
originally posted on blueair.com
Carbon Filter
These fit perfectly, I wouldn't use the off-brands after reading reviews about the odd shaping. I also could tell a big difference once using the replacement filter and running the system overnight. It really helps in removing nuisance odors like smoke from a different unit in my building!
5 out of 5 stars
2 October, 2025
originally posted on blueair.com
Great filters
Nice filters and easy to change. The app is very intuitive.
5 out of 5 stars
1 October, 2025
originally posted on blueair.com
Blueair beautiful
Love this product. It works. Air is clean and fresh even after cooking.
5 out of 5 stars
25 July, 2025
originally posted on blueair.com
Air Purifier far exceeds expectations
The max particle + carbon filter does an amazing job cleaning the air in multiple rooms. Since purchasing our Blue Air Purifier, I haven't head any head congestion or sinus infections. I did purchase the smoke filter and allergen filter thinking I would need more support during high allergy seasons and summer fires but so far the Max Particle + Carbon filter have kept unwanted particles under control. Couldn't be happier with this investment.
5 out of 5 stars
8 July, 2025
originally posted on blueair.com
Filter changes
Having the filters on a subscription plan keeps it simple for me. This way I don't miss changing the filter in a timely manner.
5 out of 5 stars
13 May, 2025
originally posted on blueair.com
Good filter
Exactly what I needed for this device. Fit perfectly and the filter is working properly.
5 out of 5 stars
10 April, 2025
originally posted on blueair.com
Excellent product!
My husband was having trouble breathing due to COPD. This has helped him tremendously. When I replaced the filter I couldn't believe how dirty it was and will continue to use.