Advanced filtration helps tackle pollen, dust, pet dander and other everyday triggers
Built-in sensors detect changes in your air and automatically adjust cleaning
Blue Pure 311i+ Max
Smart HEPASilent™ air purifier for large rooms, bedrooms and home offices with fast, quiet cleaning that adjusts automatically.
Fast & free shipping
30-day returns
Extended warrantyWhy you’ll love it
Powerful clean air for the spaces where life happens. Smart, quiet purification for fresher rooms and everyday peace of mind.
- Quickly cleans 525 ft² every 12.5 minutes & 2,520 ft² in 1 hour
- Real-time readings make air quality easy to understand
- Helps reduce pollen dust pet dander and other allergy triggers
- Fits almost anywhere with a compact 360° design
- 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
- Particle & Carbon captures everyday particles and light household odors.
- AllergenBlock traps allergens and helps neutralize their irritating properties.
- SmokeBlock uses 2x more activated carbon for smoke, smog and stronger odors.
- Main filter media captures dust, pollen, pet dander and PM2.5.
- Activated carbon helps trap cooking, pet and smoke odors.
- RealTrack™ Technology tracks filter life based on actual use and pollution levels.
- App filter alerts tell you when it’s time for a replacement.
- Easy replacement design keeps routine maintenance simple.
What’s in the box
- Blue Pure 311i+ Max
- Particle & Carbon filter in the device
- Nordic Fog pre-filter on the device
Tech specs
- Dimensions(HxWxD) 21 x 12.5 x 12.5
- Product Weight 7.9
- Energy Consumption 38 W
- Sound Level 23-50 dB
- Air Outlet Top
- Recommended Room Size 525
- 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.
⁵ AllergenBlock 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.
Advanced filtration helps tackle pollen, dust, pet dander and other everyday triggers
Built-in sensors detect changes in your air and automatically adjust cleaning
Why choose Blue Pure 311i+ Max?
Removes 99.97%¹ of tiny airborne particles to quickly transform your bedrooms, playrooms, or basements into a personal wellness retreat where you can thrive.
With ultra-quiet performance, you’ll enjoy restful nights and wake up refreshed, creating the perfect balance for your healthy lifestyle.
Simple and intuitive, the one-touch control makes it easy to adjust settings without any hassle.
Modern, minimalist design that blends seamlessly into any bedroom or office while delivering clean, fresh air.
“I recommend Blueair air purifiers to my patients because of their strong performance and their commitment to third party testing, which gives me peace of mind that the airborne particles that commonly exacerbate allergy and asthma symptoms are being captured*”
Dr. Priya Bansal
“Blueair's 311i+ Max was the best at capturing the full range of contaminants floating through the air in a typical home. Its advanced multi-level filtration captures contaminants of all sizes — not just dander and pet hair, but also cooking fumes, dust mites and pollen.”
Best Overall Air Purifier
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 Blueair app
Choose your fan speed, set to auto or night mode and display lock your settings.
Tailor your air purifier’s settings to your daily routine with customized schedules. 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.
Enjoy the convenience of the of your air purifier activating you are a few miles away from home.
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 311i+ 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 311i+ Max?
To achieve maximum performance we recommend placing your Blue Pure 311i+ Max in a room around 525 ft²room so your air purifier can clean the air at the AHAM recommendation of 4 times every 12.5 minutes. The Blue Pure 311i+ Max will clean a 1,260 ft²space in 30 minutes, and 2,520 ft² in 1 hour
What are the noise levels of the Blue Pure 311i+ Max?
Operates quieter than a whisper on low at 25 db and is no louder than 50 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 311i+ Max?
Register your product to extend the 1-year warranty to a 3-year warranty.
Technical Specifications
- Dimensions(HxWxD)
- 21 x 12.5 x 12.5
- Product Weight
- 7.9 lb
- Energy Consumption
- 38 W
- Sound level
- 23-50 dB
- Air outlet
- Top
- Recommended room size
- 525 ft²
- Air changes per hour (ACH)
- 4.8
- Clean air delivery rate (CADR)
- Pollen 446 cfm Dust 370 cfm Smoke 339 cfm
- Number of filters
- 1
- Speed control options
- 1 - 2 - 3 - Auto - Night
Reviews
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