Compact 360° air intake gives you powerful cleaning without limiting where it can live
Built-in sensors detect changes in your air and automatically adjust cleaning
Blue Pure 511i Max
Smart HEPASilent™ air purifier for medium rooms, bedrooms and home offices with fast, quiet cleaning that adjusts automatically.
Fast & free shipping
30-day returns
Extended warrantyWhy you’ll love it
Smart, quiet clean air for the spaces you spend the most time in. Powerful purification for fresher rooms, restful nights and more comfortable days.
- Quickly cleans 237 ft² every 12.5 minutes & 1,138 ft² in 1 hour
- Refreshes bedrooms and everyday spaces fast
- Automatically adjusts when your air changes
- Runs whisper quiet for sleep and focus
- Gives you easy control at home or away
Auto Mode keeps cleaning effortless 
Specialized filters for your needs 
Accurate filter lifetime tracking 
Control from anywhere
Features & Technologies
- HEPASilent™ technology captures 99.97% of tiny airborne particles
- Integrated sensors continuously monitor your air
- 360° air intake helps clean the whole room efficiently
- 3 fan speeds let you choose your cleaning power
- Auto Mode adjusts fan speed based on detected pollutants
- Night Mode keeps cleaning quieter while you sleep
- Wi-Fi connectivity gives you easy app control
- RealTrack Technology® accurately tracks filter life
- Washable pre-filters let you customize the look
What’s in the box
- Blue Pure 511i Max
- Particle & Carbon filter in the device
- Nordic Fog pre-filter on the device
Tech specs
- Dimensions(HxWxD) 14.5” x 9.3” x 9.3”
- Product Weight 4.2
- Energy Consumption 17 W
- Sound Level 19-48 db
- Air Outlet Top
- Recommended Room Size 237
- Number Of Filters 1
Product Notes
¹ Tested on PM 2.5 up to 90 mins
² Based on ELISA deactivation testing of Pollen (Cry J1), Pet Dander (Fel d1, Can F1), Dust Mite Matter (Der f1) on the filter media in 60 minutes.
³ Compared to standard in-unit filter. Based on removal testing of particles 0.4-0.7 μm in 60min in a 30m3 room. Performance may vary.
⁴ When similar CADR was measured, Blueair models with mechanical and electrostatic filtration achieved less noise with less energy than same models with only H13 HEPA mechanical filtration.
⁵AllergenBlock refers to inanimate allergens pollen, dust and pet dander.
*Comparing CADR performance of Blueair models with mechanical and electrostatic filtration vs same models with only H13 HEPA mechanical filtration.
Note: CADR and room size values have been updated to meet new DOE standards. Website listings reflect the most accurate information. You may notice slight differences versus product packaging during the transition.
Compact 360° air intake gives you powerful cleaning without limiting where it can live
Built-in sensors detect changes in your air and automatically adjust cleaning
Why choose Blue Pure 511i Max?
The "Welcome Home" feature automatically turns the purifier on when you're near and off when you leave, so your family always returns to a clean, safe environment without any extra effort.
A sound level as low as 19 dB, the Blue Pure 511i Max operates quietly, ensuring it won’t disturb you or your family.
Equipped with a compact, rounded shape, and display lock, the Blue Pure 511i Max is designed to fit seamlessly into any room without sharp edges, making it safe for children’s bedrooms or play areas.
Monitor indoor & outdoor air quality, set schedules, and have 24/7 control of your air purifier in the trusted Blueair app.
“I love that I can operate it from anywhere with the app. I can get it going before I get home from being outdoors. It is a very quiet machine. It has night mode and will dim or turn off all lights on the machine.”
Lesann
“I like having a one for each high-traffic room such as our master bedroom, office, and living room. Although this one was intended for our office, it is by far the most attractive air purifier I have yet to see, so I swapped it for the one we had in our living room.”
MrsAdams
“The unit will automatically adjust according to the air quality, and there is a light indicator letting you know how it accesses the value. You can also set it manually, with three fan speeds, and wireless capabilities.”
Kmill
4 layers of filtration remove 99.97%¹ of airborne pollutants
HEPASilent™ technology combines electrostatic and mechanical filtration to capture tiny airborne pollutants like pollen, dust and smoke, faster* and quieter⁴ than traditional HEPA.
Meet our filters
Particle & Carbon
Our original filter. Removes allergens and traps light household odors from pets, cooking and smoke
SmokeBlock
2x more activated carbon than our original filter. Removes up to 99.99%³ of wildfire smoke
AllergenBlock⁵
Extra protection against allergens. Traps and neutralizes dust, pollen and pet dander
Exclusive features in the highly rated Blueair app
Pick your fan speed, let auto or night mode take over & keep settings secure with display lock.
Set your preferred times for enhanced air purification, so you can wake up to fresh air, keep your home clean during peak hours, and save energy when you're away.
Tracks your filter lifetime based on pollutant levels and alerts you when it’s time to replace your filter.
Free and fast shipping
30 day home trial
Extended warranty
FAQ
What pollutants does the Blue Pure 511i Max filter out?
Our HEPASilent™ dual filtration technology removes 99.97%¹ of airborne particles down to 0.1 microns, ensuring pollen, cooking odors, smoke, dust, pet dander, mold, chemicals, allergen matter and even tiny particles such as viruses and bacteria², are captured with minimal noise and energy consumption.
What room size is best for the Blue Pure 511i Max?
To achieve maximum performance we recommend placing your Blue Pure 511i Max in a room around 237 ft² room so your air purifier can clean the air at the AHAM recommendation of 4 times every 12.5 minutes. The Blue Pure 511i Max will clean a 569 ft² space in 30 minutes, and 1,138 ft² in 1 hour.
What are the noise levels of the Blue Pure 511i Max?
Operates quieter than a whisper on low at 19 db and is no louder than 42 dB on high fan speed.
How often do I need to change the filters?
Your filter will last up to 9 months thanks to our proprietary RealTrack algorithm that accurately calculates the remaining filter lifetime based on fan speed, usage time and pollution levels.
When it's time to replace the filter, the filter replacement LED on the interface will turn red to remind you. Alternatively, connect to the Blueair app to receive an alert and easily re-order at the touch of a button.
What is the warranty for the Blue Pure 511i Max?
Register your product to extend the 1-year warranty to a 3-year warranty.
Technical Specifications
- Dimensions(HxWxD)
- 14.5” x 9.3” x 9.3”
- Product Weight
- 4.2 lb
- Energy Consumption
- 17 W
- Sound level
- 19-48 db
- Air outlet
- Top
- Recommended room size
- 237 ft²
- Air changes per hour (ACH)
- 4.8
- Clean air delivery rate (CADR)
- Pollen 174 cfm Dust 159 cfm Smoke 153 cfm
- Number of filters
- 1
- Speed control options
- 1 - 2 - 3 - 4 - Auto - Night
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