Air Quality research

Blueair Blue 211i Max: CADR, Room Fit, Noise, and Smart Controls

Blueair Blue 211i Max CADR, room-size basis, noise range, power use, filter design, and smart-control buying context from current manufacturer documentation.

Written by BenchPicked Editorial Team · Sources checked Sep 26, 2026

Decision research map for Blueair Blue 211i Max: CADR, Room Fit, Noise, and Smart Controls based on published information — BenchPicked decision research: published facts, constraints, alternatives, and source records.

Decision answer

Bottom line

Blueair publishes pollutant-specific CADR values of 452 CFM for dust, 435 CFM for smoke, and 450 CFM for pollen for the Blue 211i Max. Its 674 sq ft recommendation is tied to 4.8 air changes per hour; compare that basis, the 23-53 dB sound range, and replacement-filter cost with the room and operating schedule.

For: buyers comparing the current product with alternatives for a defined use and ownership budget
Decision: decide whether Blueair Blue 211i Max fits the intended use and current purchase constraints
Context: matching published capability, setup constraints, upkeep, and purchase terms

Decision matrix

Read each published value in the context of the decision it can actually support.

Blueair Blue 211i Max decision matrix
Factor	Published information	How to use it
Brand	Blueair	Compare this published value only with an equivalent model, test basis, operating condition, and market.
Model	Blue 211i Max	Compare this published value only with an equivalent model, test basis, operating condition, and market.
Category	air purifier	Compare this published value only with an equivalent model, test basis, operating condition, and market.
Cadr Dust	452 CFM	Compare this published value only with an equivalent model, test basis, operating condition, and market.
Cadr Smoke	435 CFM	Compare this published value only with an equivalent model, test basis, operating condition, and market.
Cadr Pollen	450 CFM	Compare this published value only with an equivalent model, test basis, operating condition, and market.
Coverage Area Sqft	674 sq ft at 4.8 ACH	Compare this published value only with an equivalent model, test basis, operating condition, and market.
Noise Level Db	23-53 dB	Compare this published value only with an equivalent model, test basis, operating condition, and market.

Claim and evidence record

manufacturer attributed

Brand: Blueair

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Model: Blue 211i Max

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Category: air purifier

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Cadr Dust: 452 CFM

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Cadr Smoke: 435 CFM

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Cadr Pollen: 450 CFM

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Coverage Area Sqft: 674 sq ft at 4.8 ACH

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Noise Level Db: 23-53 dB

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Power Consumption W: 46 W

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Dimensions: 14.4 x 14.4 x 22.7 in

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Weight: 16.2 lb

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Filter Type: HEPASilent particle and carbon filtration with washable pre-filter

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

manufacturer attributed

Smart Features: WiFi, app control, auto mode, and night mode

This is attributed to current manufacturer documentation; BenchPicked did not independently measure it.

Blueair Blue 211i Max official specifications

When another option is the better fit

A product with stronger like-for-like performance evidence

Choose this when the cited source does not publish the metric needed for the decision.

A lower-cost ownership option

Choose this when replacement parts, subscriptions, accessories, or energy materially change the total cost.

A simpler non-connected option

Choose this when app, account, network, or data-sharing requirements do not fit the intended use.

Decision support

Fit and ownership checks

Fits when

Readers matching this audience: buyers comparing the current product with alternatives for a defined use and ownership budget
Decisions that require this task: decide whether Blueair Blue 211i Max fits the intended use and current purchase constraints
Use in this stated context: matching published capability, setup constraints, upkeep, and purchase terms

Complete before comparing total cost

Replacement-part price, availability, and expected interval
Electricity cost at the expected operating setting and local tariff
Current device price, shipping region, and availability
Required accessories, consumables, or paid services

Sources used for this decision

Blueair Blue 211i Max official specifications: Manufacturer record used for the published facts on this page.
Blueair Blue 211i Max user manual: Manufacturer Manual record used for the published facts on this page.

Evidence boundary: this module compares cited published information. It does not add first-hand measurements or infer results outside the stated source conditions.

Decision data

Does Blueair Blue 211i Max fit my requirements and total ownership constraints?

Blueair publishes pollutant-specific CADR values of 452 CFM for dust, 435 CFM for smoke, and 450 CFM for pollen for the Blue 211i Max. Its 674 sq ft recommendation is tied to 4.8 air changes per hour; compare that basis, the 23-53 dB sound range, and replacement-filter cost with the room and operating schedule.

Brand: Blueair
Model: Blue 211i Max
Category: air purifier
Cadr Dust: 452 CFM

Evidence boundary

Published specifications are attributed to their named sources and are not BenchPicked laboratory measurements.

Current buying option

Check the seller terms before ordering

Use the evidence and limitations above to decide whether this product fits. Price, availability, shipping, and return terms can change on the seller page.

Check price on Amazon Seller: Amazon (paid link) We may earn a commission from Amazon.

Research details

Bottom line

Blueair publishes pollutant-specific CADR values of 452 CFM for dust, 435 CFM for smoke, and 450 CFM for pollen for the Blue 211i Max. Its 674 sq ft recommendation is tied to 4.8 air changes per hour; compare that basis, the 23-53 dB sound range, and replacement-filter cost with the room and operating schedule.

Published specification basis

Blueair's product sheet and manual provide separate dust, smoke, and pollen CADR values, plus the 4.8-ACH basis behind the 674 sq ft room figure. Treat those figures as Blue 211i Max values rather than a promise that every room will receive the same air-change rate.

Ownership cost and purchase terms

Price the Blue 211i Max together with its compatible replacement filter and the 46 W rated draw at the fan schedule you expect to use. The washable fabric pre-filter changes cleaning work, but it does not remove the need to budget for the main filter.

Before you follow the offer

The Amazon destination must identify Blue 211i Max and ASIN B0BN2MGV5H. Before checkout, confirm the color variant, filter included in the box, seller, U.S. electrical version, delivered price, return window, and who fulfills the warranty.

Evidence boundary

BenchPicked did not measure this purifier's CADR or sound level. The recommendation is limited to Blueair's published test figures and to room-fit calculations that use the stated air-change basis.

Published specs

Source-attributed specification table
Field	Value	Source basis
Brand	Blueair	Source Attributed (view source)
Model	Blue 211i Max	Source Attributed (view source)
Category	air purifier	Source Attributed (view source)
Cadr Dust	452 CFM	Source Attributed (view source)
Cadr Smoke	435 CFM	Source Attributed (view source)
Cadr Pollen	450 CFM	Source Attributed (view source)
Coverage Area Sqft	674 sq ft at 4.8 ACH	Source Attributed (view source)
Noise Level Db	23-53 dB	Source Attributed (view source)
Power Consumption W	46 W	Source Attributed (view source)
Dimensions	14.4 x 14.4 x 22.7 in	Source Attributed (view source)
Weight	16.2 lb	Source Attributed (view source)
Filter Type	HEPASilent particle and carbon filtration with washable pre-filter	Source Attributed (view source)
Smart Features	WiFi, app control, auto mode, and night mode	Source Attributed (view source)

Buying options

Approved affiliate buying links for Blueair Blue 211i Max: CADR, Room Fit, Noise, and Smart Controls
Store	Price	Action
Amazon	Check current price on Amazon	Check price on Amazon^*
* Affiliate links - prices may vary. Last checked: Sep 26, 2026.

Source notes

Blueair Blue 211i Max Official Specifications · Manufacturer · Checked Sep 26, 2026
Blueair Blue 211i Max User Manual · Manufacturer Manual · Checked Sep 26, 2026

Questions

What is the main buying case for Blueair Blue 211i Max?

The strongest case is a larger room where pollutant-specific CADR, low-speed sound, and app control matter enough to justify ongoing filter cost. Recalculate room fit from the CADR rather than choosing it from the 674 sq ft headline alone.

Has BenchPicked independently tested Blueair Blue 211i Max?

No. BenchPicked has not independently tested Blueair Blue 211i Max; the specifications and limits are attributed to the named sources.

What should I verify before following the offer?

Confirm that the Amazon page still identifies Blueair Blue 211i Max and ASIN B0BN2MGV5H, then verify seller, included parts, delivered price, regional compatibility, return terms, and warranty.

Before you buy

Recheck fit and current terms

Confirm Blueair Blue 211i Max: CADR, Room Fit, Noise, and Smart Controls's model, included items, delivery, return policy, and any recurring costs before checkout.

Check price on Amazon Seller: Amazon (paid link) We may earn a commission from Amazon.

How BenchPicked separates published facts, analysis, and evidence limits

Blueair Blue 211i Max: CADR, Room Fit, Noise, and Smart Controls

Check price on Amazon (paid link) We may earn a commission from Amazon.