The Blueair Blue Pure 211i Max is a large-room smart air purifier that filters 99.97% of airborne particles down to 0.1 microns, including dust, pollen, pet dander, smoke, mold, and household odors. Coverage extends up to 3,235 square feet in an hour, or the recommended 674 square feet cleaned four times every 12.5 minutes. HEPASilent dual filtration combines mechanical and electrostatic filtration for quieter operation than traditional HEPA. Wi-Fi, voice control, and PM sensors round out the smart side.
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A reliable machine to clear your air throughout your home
HEPASilent is Blueair’s filtration technology, combining mechanical filtration with an electrostatic charge that attracts smaller particles onto the filter fibers. Traditional HEPA filters trap particles through dense fiber mats alone, which slows airflow and pushes the fan to work harder. The electrostatic layer lets air move through less dense filter media at the same effectiveness, cutting noise and energy use. Air first passes through a washable pre-filter that catches larger dust and pet hair, then the main HEPA-plus-carbon filter takes over.
Room coverage scales from small rooms up to open floor plans. Blueair recommends the unit for spaces around 674 square feet, cleaned four times every 12.5 minutes at the AHAM standard. In smaller rooms, air exchanges happen more frequently for faster relief. The unit refreshes 1,618 square feet in 30 minutes on high, or 3,235 square feet in an hour.
