Blueair Blue Pure 311i Max Smart Air Purifier - Medium Room Coverage And HEPASilent Filtration

Blueair Blue Pure 311i Max smart air purifier is rated to clean up to 387 sq ft in about 12.5 minutes or 929 sq ft in 30 minutes on high, with a CADR of 250 for smoke, dust, and pollen. For allergy-prone households, its 23-50 dB noise range is a key detail.

Blueair Blue Pure 311i Max is a smart air purifier designed for medium-size living spaces, combining the company’s HEPASilent filtration technology with Wi-Fi control and app integration for US homes that need quieter, quantified air cleaning.

Coverage, CADR And Filtration Performance

At its core, the Blueair Blue Pure 311i Max is built around Blueair’s branded HEPASilent system, a combination of mechanical filtration and electrostatic technology that is specified to remove at least 99.97% of airborne particles down to 0.1 microns, including fine smoke, pollen, dust, pet dander and certain bacteria and viruses.Blueair’s US product listing states recommended coverage of 439 sq ft at 4.8 air changes per hour (ACH), with clean air delivery rate (CADR) figures of 283 cubic feet per minute (CFM) for smoke, 314 CFM for dust and 365 CFM for pollen.

Retailer data for US buyers emphasizes time-to-clean metrics: Target specifies that the Blue Pure 311i Max can clean a 387 sq ft room in about 12.5 minutes, or up to 929 sq ft of space in 30 minutes when operated on high, and labels its CADR as 250 for fine smoke particles, dust and pollen.Target’s specification table also confirms that it uses a single HEPA filter with an integrated carbon layer and a washable fabric pre-filter around the housing.

A detailed third-party specification roundup for this model notes a maximum airflow of 250 CFM and confirms that the device is Energy Star and CARB certified, with manufacturer-suggested room size of 929 sq ft and suitability for general air quality, allergies, odor and chemical, smoke, virus and bacteria, pet hair and mold concerns.Sylvane’s spec sheet lists the maximum noise level as 50 dB and repeats the 250 CFM CADR scores for smoke, dust and pollen.

Design, Dimensions And Smart Features

Physically, the Blue Pure 311i Max follows Blueair’s cylindrical fabric-wrapped design language, with a footprint that is specified at 12.5 inches in width and depth and a height of 19 inches.Blueair’s US shop page lists its product weight at 7.8 lb, energy consumption at 32 W and a sound level range of 23-50 dB, with five speed control options: 1, 2, 3, Auto and Night mode.

Target’s listing categorizes the 311i Max as a medium-room HEPA air purifier and confirms that it includes the main filter in the box, offers four user-selectable settings, and is equipped with app and voice control, an electronic filter monitor, and a carbon filter layer to trap light household odors from smoking, pets and cooking.The same Target specification table notes a 1-year limited warranty and a maximum filter life of up to 9 months.

From an installation perspective, Sylvane’s technical overview confirms that the purifier operates on 110-120 V mains power, draws a maximum of 0.42 A and offers features such as a filter change indicator, programmable timer, sleep mode and Wi-Fi capability, all within a portable housing that omits casters but includes a washable outer fabric pre-filter.Sylvane’s product page also categorizes the color as gray and reiterates the 7.8 lb weight and 12.5 x 12.5 x 19 inch dimensions.

Pricing And Position In The Blueair Lineup

In terms of current US pricing, a specification and price-tracking service reports that the Blueair Blue Pure 311i Max carries a US list price of $229.99 on Blueair’s own site as of 07/25/2026, noting that it had previously been recorded as low as $172.49 and that the $229.99 level places it among the less expensive options in a 21-model comparison of air purifiers with a median price of $349.99.This Front Desk Review entry summarizes the current US price as $229.99 as of 07/25/2026.

Major US electronics retailer listings show promotional variation: a Best Buy brand overview page cites a price of $189.99 for the Blue Pure 311i Max, against a comparable value benchmark of $229.99, in a section that groups Blueair-branded devices across sizes.The same Best Buy overview uses this price alongside a 4.8 out of 5 average rating and identifies the Blue Pure 311i Max as a 1,800 sq ft smart HEPASilent air purifier, reflecting its maximum time-to-clean specification rather than the 4.8 ACH recommendation.

For a more precise SKU listing, Best Buy’s dedicated product page for the Blue Pure 311i Max states a current price of $189.99, down from a typical $229.99 comparable value, and reiterates that it is designed to quickly clean 387 sq ft in 12.5 minutes, 929 sq ft in 30 minutes and up to 1,800 sq ft in one hour on high, with a CADR of 250 for fine smoke particles, dust and pollen.This Best Buy product page also emphasizes its Energy Star Most Efficient 2023 designation as part of the marketing copy.

Comparison With Alternatives And Successor Models

Within Blueair’s own range, the Blue Pure 311i Max is positioned below larger-room models such as the Blue Pure 211i Max, which Best Buy lists as an extra-large room purifier rated to clean 635 sq ft in about 12.5 minutes, up to 1,524 sq ft in 30 minutes and 3,000 sq ft in one hour, with a CADR of 410 for fine smoke particles, dust and pollen and a typical price point of around $349.99.The same Blueair brand page at Best Buy frames the 311i Max as the lower-cost, medium-room option in that context.

Costco’s listing of a related configuration, the Blue Pure 311i+ Max, indicates a variant with upgraded coverage and CADR: this model is described as cleaning up to 2,520 sq ft in 60 minutes and carrying CADR ratings of 339 CFM for smoke, 370 CFM for dust and 446 CFM for pollen, with a maximum coverage area of 1,262 sq ft.Costco’s specification table distinguishes this 311i+ Max variant by model number 113624 and a slightly different housing dimension set of 12.5 x 6.8 x 21 inches and 7.9 lb weight, compared with the 12.5 x 12.5 x 19 inches and 7.8 lb of the standard 311i Max.

In independent lab-style testing against a set of competitor devices, a detailed performance review notes that the Blue Pure 311i Max cleared a 728 cubic foot room in 27 minutes at top speed, measured as a 220 CFM PM1 CADR by a PurpleAir Zen sensor, placing it among mid-range performers in terms of particulate removal speed relative to price.The same Front Desk Review entry positions the 311i Max as sixth cheapest of 21 air purifiers in its 2026 comparison set.

Manufacturer, Brand Ownership And US Entity

Blueair began operating in Sweden in 1996 and today presents itself as a global air wellness brand focused on cleaner indoor environments, with corporate headquarters in Stockholm and locations ranging from Dubai and Shanghai to Chicago, IL in the United States.A company profile lists a US office at 100 N LaSalle St, Suite 1900, Chicago, Illinois, underscoring the brand’s US presence.

On the corporate side, Blueair was acquired by consumer goods group Unilever on 08/16/2016, in a deal that placed the Swedish air-purifier specialist into Unilever’s home care business while retaining the Blueair brand name across markets including the US, Sweden, China, Japan and South Korea.An acquisition announcement confirms that Blueair is now a wholly owned subsidiary of Unilever while continuing to operate under its own brand for air purification products.

Industry and data services corroborate this structure, describing Blueair as a manufacturer of air purification products designed for indoor air quality and identifying Unilever as the acquiring company as of August 16, 2016, with Blueair, Inc. noted as an active United States legal entity incorporated on 12/31/1999.A company profile and acquisition record indicates that Blueair is headquartered in Stockholm and part of Unilever’s portfolio.

Use Case, Value Assessment And Limits

Taking the quantified specs together, the Blueair Blue Pure 311i Max is most clearly targeted at medium-size bedrooms, living rooms and home offices where users want a balance of verified particulate removal, relatively low energy draw and moderate noise levels rather than maximum throughput or industrial-scale coverage.

The combination of 439 sq ft recommended room size at 4.8 ACH, up to 929 sq ft time-to-clean capability in 30 minutes on high, CADR scores in the 250-365 CFM range and a noise band of 23-50 dB positions the 311i Max as a mid-tier purifier that trades outright capacity for quieter operation and smart control, especially when compared with heavier-duty units like the Blue Pure 211i Max that push CADR to around 410 CFM and extend coverage toward 3,000 sq ft but command higher prices.

For prospective buyers weighing options, the key limits of the 311i Max lie in its single-filter design and medium-level CADR relative to larger devices, which means that very large open-plan spaces or severe smoke conditions may call for either multiple units or a step up to higher-capacity models; at the same time, its combination of HEPASilent filtration, app integration, Energy Star Most Efficient recognition and a list price near $229.99 as of late July 2026 makes it a numerically well-defined option for households prioritizing certified performance and specified room coverage over sheer size.

Blueair Blue Pure 311i Max Key Facts

• Product: Blueair Blue Pure 311i Max smart air purifier
• Manufacturer: Blueair, Inc., Chicago, IL (subsidiary of Unilever)
• Category: Air purifier (HEPASilent, medium room)
• Recommended room size: 439 sq ft at 4.8 ACH
• CADR ratings: Smoke 283 CFM, dust 314 CFM, pollen 365 CFM
• Dimensions and weight: 19 in (H) x 12.5 in (W) x 12.5 in (D), 7.8 lb
• Power and noise: 32 W consumption, 23-50 dB sound level
• Price: $229.99 list (as of 07/25/2026), with promotional pricing around $189.99 at US electronics retailers
• Target audience: US households needing certified medium-room air cleaning with smart control and moderate noise