Blueair - Blue Pure 511i Max 1138 sq ft HEPASilent Small Room Bedroom Air Purifier - White/Gray
Customers are saying
Customers appreciate the exceptionally quiet operation and the significant improvements in air quality provided by this product. Users also frequently highlight its strong overall performance, user-friendly design, and long-lasting filters. While the device is highly regarded for its effectiveness in bedrooms and allergy relief, some users have noted occasional issues with the stability of the Bluetooth connectivity.
Features
Powerful Air Cleaning for Small Rooms
The Blue Pure 511i Max quickly refreshes indoor air in bedrooms, nurseries, home offices, and apartments. It cleans 237 csq ft in about 12.5 minutes and up to 1,138 sq ft in one hour.
Removes Dust, Smoke, Pet Dander & Allergens
Blueair’s HEPASilent dual filtration technology captures 99.97% of airborne particles down to 0.1 microns, including dust, pollen, pet dander, mold particles, and smoke.
Quiet Air Purifier for Bedrooms
Designed for sleep-friendly performance, the purifier operates as quietly as 19 dB, making it ideal for bedrooms, nurseries, and dorm rooms..
Smart Air Purifier with App Control
Built-in air quality sensors automatically adjust fan speed when pollution levels rise. Use the Blueair mobile app to monitor air quality, control settings, and receive filter replacement reminders.
Compact Design for Modern Homes
The Blue Pure 511i Max features a compact Scandinavian-inspired design with 360° air intake, allowing it to fit easily in small rooms while efficiently circulating clean air.
Let’s Clear the Air Easier
Intuitive display, 5-color AQI, and simple two-button design make it easy to control fan speed 1 – 3 including night mode, auto mode and child lock.
Performance Comparison Disclaimer
*Comparing pollen CADR on high fan speed (Blue Pure 411a Max & 411i Max vs. Blue 411 Auto), other units may vary. Based on AHAM maximum allowable certified rating which may vary from the AHAM seal claimed valued. Noise refers to the dB(A) difference in acoustic power.
Filtration Efficiency Disclaimer
**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.
Test Results Disclaimer
***Tested PM 2.5 (0.1 - 2.5 microns) up to 90min in a 30m3 room. Tested to remove min. 99.9% of S. aureus, K. pneumoniae, P. aeruginosa, MS2, E.Coli, H1N1, A.Niger.
Specifications
- Recommended Room Size1138 square feetApp CompatibleYesWireless ConnectivityWi-Fi, Wi-FiAir Quality Indicator Light(s)YesFilter TypeActivated carbonClean Air Delivery Rate (CADR)125 cubic feet per minute
Reviews
Rating 4.8 out of 5 stars with 270 reviews
- Noise Level (111)
- Air Quality (80)
- Overall Performance (76)
- Ease of Use (23)
- Design (20)
Customer Images
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
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The Blueair Blue Pure 511i Max smart air purifier is designed for bedrooms, small rooms, and apartments that need efficient air cleaning. Using advanced HEPASilent™ filtration technology, it captures 99.97% of airborne particles including dust, pollen, pet dander, and smoke, helping improve indoor air quality. Capable of cleaning up to 1,138 square feet in one hour, the Blue Pure 511i Max is ideal for bedrooms, nurseries, home offices, and homes with pets or allergy concerns. Experience powerful air purification in a compact design with the Blueair Blue Pure 511i Max smart air purifier, engineered for bedrooms and small living spaces. The purifier combines mechanical and electrostatic filtration through Blueair’s proprietary HEPASilent™ technology, capturing airborne pollutants such as dust, pollen, pet dander, smoke particles, and mold spores while maintaining quiet operation. This advanced filtration captures particles down to 0.1 microns, helping keep indoor air cleaner and fresher. Designed for small spaces, the Blue Pure 511i Max refreshes indoor air quickly, cleaning 237 square feet in about 12.5 minutes or up to 1,138 square feet in one hour. This makes it ideal for bedrooms, dorm rooms, apartments, home offices, and nurseries. Smart sensors monitor air quality and automatically adjust fan speed when pollution levels rise. Through the Blueair mobile app, you can check air quality levels, schedule operation, and receive filter replacement reminders. With quiet performance as low as 19 dB and a compact Scandinavian design, the Blue Pure 511i Max blends seamlessly into modern homes while delivering efficient air purification. Whether you're managing pet dander, seasonal allergies, cooking odors, or everyday dust, the Blue Pure 511i Max helps create a cleaner and more comfortable indoor environment.

The Blueair Blue Pure 311i Max smart air purifier is designed for bedrooms, living rooms, and medium-size homes that need powerful air cleaning. Using advanced HEPASilent™ dual filtration technology, it captures 99.97% of airborne particles such as dust, pollen, pet dander, mold particles, and smoke, helping improve indoor air quality. Capable of cleaning up to 439 square feet in about 12.5 minutes or up to 2,107 square feet in 1 hour, the Blue Pure 311i Max is ideal for bedrooms, apartments, home offices, and households with pets or allergy concerns. The purifier combines mechanical and electrostatic filtration to efficiently remove airborne pollutants while maintaining strong airflow and quiet performance. Blueair’s HEPASilent technology helps deliver high filtration efficiency with lower energy use and less noise compared with traditional HEPA filtration systems. With a Clean Air Delivery Rate (CADR) of 250 for smoke, dust, and pollen, the Blue Pure 311i Max quickly circulates and refreshes indoor air, helping maintain cleaner air throughout your space. Smart sensors monitor indoor air quality and automatically adjust fan speed when pollution levels rise. Through the Blueair mobile app, you can track air quality, control settings remotely, and receive filter replacement reminders for easy maintenance. Designed for everyday living, the Blue Pure 311i Max features quiet operation and a compact Scandinavian-inspired design with 360° air intake, allowing it to blend seamlessly into bedrooms, living rooms, and home offices while efficiently circulating clean air. Whether you’re managing pet dander, seasonal allergies, smoke particles, or everyday dust, the Blueair Blue Pure 311i Max helps create a cleaner, more comfortable indoor environment.

The Shark NeverChange Air Purifier delivers all-day clean air with powerful, long-lasting HEPA filtration. Watch your air quality improve in real time and breathe easier as Shark's PureShield Anti-Allergen* filtration captures dust, pet dander, smoke, irritants, and more. Plus, with up to 5 years of long-lasting filtration,** you can save big on pricey filter replacements.*Allergen refers to non-living matter. ** vs. cost of replacing filters over a 5-year period on top 10 leading competitor units under $150. Source: Based on market share data as of Nov. ‘23 to Oct ‘24.

Refresh your home with the Levoit Core 200S-P Smart Air Purifier. The efficient 3-stage filtration includes a Nylon Pre-Filter, Main Filter, and a High-Efficiency Activated Carbon Filter. Together, they trap large particles like hair, remove at least 99.97% of airborne particles down to 0.3 microns, and help remove odors, smoke, and fumes. With smart control, you can program timers, set schedules, and control air purifier settings from within the VeSync app. You can even monitor filter life and connect with third-party voice assistants for hands-free control. With noise levels as quiet as 24dB, this air purifier offers maximum comfort with minimum disturbance. Perfect for small rooms like bedrooms, offices, and nurseries.
| Pros for Blueair - Blue Pure 511i Max 1138 sq ft HEPASilent Small Room Bedroom Air Purifier - White/Gray | |||
|---|---|---|---|
| Noise Level, Air Quality, Overall Performance, Design, Ease of Use | Noise Level, Air Quality, Overall Performance, Design, Ease of use | Air Quality, Noise Level, Overall Performance, Ease of use, Filter Life | Air Quality, Noise Level, Overall Performance, Ease of use, Size |
| Cons for Blueair - Blue Pure 511i Max 1138 sq ft HEPASilent Small Room Bedroom Air Purifier - White/Gray | |||
| There were no cons for this product— | WiFi Connectivity | There were no cons for this product— | There were no cons for this product— |






































































