Blueair Blue Pure 311i Max - 439 Square Feet and 32 W

Blueair Blue Pure 311i Max is a cylindrical smart air purifier with a 19 x 12.5 x 12.5-inch footprint and a top-mounted air outlet. Its US specifications list 32 W of energy consumption, a 23-50 dB sound range, and a recommended room size of 439 square feet.Blueair's US specifications give the model a defined place among medium-room air purifiers.

Measured Air-Cleaning Hardware

The purifier uses HEPASilent dual filtration, combining electrostatic and mechanical filtration. Blueair states that the system removes 99.97% of airborne particles down to 0.1 microns under its stated test conditions.The filtration description names pollen, dust, smoke, pet dander, cooking odors, and other airborne pollutants.

Clean air delivery rate is listed at 365 cfm for pollen, 314 cfm for dust, and 283 cfm for smoke. The unit has one filter and five control choices: speed 1, speed 2, speed 3, Auto, and Night.

Smart Controls and Room Fit

The Blueair app supports remote control, fan-speed selection, Auto and Night modes, display lock, schedules, and filter-life tracking. The owner's manual identifies Wi-Fi and Bluetooth functions, with Bluetooth used for initial pairing and Wi-Fi used for continued network operation.

Independent testing gives the model a measured ideal coverage of 444 square feet, close to Blueair's 439-square-foot recommendation. TechGearLab also records measured dimensions of 19 x 12.5 x 12.5 inches and a measured weight of 7.3 lb, while the manufacturer lists product weight at 7.8 lb; those are separate measurements from different test methods.Independent testing also reports app control and an air-quality sensor.

Price, Warranty, and Position

US retail listings place the Blueair Blue Pure 311i Max at $229.99 as of 09/24/2026. Target lists a one-year limited warranty and a maximum filter life of 9 months for the exact model listing.The US retail listing also identifies smartphone control, voice control, Wi-Fi, Bluetooth, and an electronic filter monitor.

Compared with the larger Blueair Blue Pure 211i Max, the 311i Max is specified for a smaller room and lower airflow class. Blueair lists the 211i Max at 410 cfm and 635 square feet in its product-feature comparison, while the 311i Max is listed at 283 cfm smoke CADR and 439 square feet.That separates the models by room scale rather than by app access, since both support connected controls.

Who the 311i Max Fits

Blueair Blue Pure 311i Max fits medium rooms where a 439-square-foot recommendation, 283 cfm smoke CADR, and connected controls match the intended space. Its 19-inch height and 7.8 lb listed weight also keep the chassis smaller than Blueair's higher-airflow large-room models.

The verdict is specific: this is a connected medium-room purifier for users who want app scheduling, Auto mode, filter tracking, and a compact tower. Larger open areas call for a higher-CADR model, while the stated one-year warranty and 9-month maximum filter life define the ownership terms.