Alen BreatheSmart FLEX 4 + White

Room Air Purifiers / Extra-Large Room (650 sq. ft. or more)

This air purifier from Alen has

a filter indicator
a programmable timer
4 speeds

It’s designed for floor or tabletop use in a 700 sq ft space and weighs 15 pounds.

Unlock to see our ratings and compare products side by side

CR Expert Take

How did it perform in our owner surveys and expert lab testing?

Overall Score

The Overall Score for this model incorporates our expert lab test results, as well as ratings for that brand’s reliability and owner satisfaction from our annual product owner survey of members.

Unlock ratingswith membership.

Current Range of Tested Room Air Purifiers

What goes into the Overall Score?

OWNER SURVEYS

Learn More

Dust, pollen, smoke removal (low)

/ 5

Dust, pollen, smoke removal (high)

/ 5

Noise (low speed)

/ 5

Noise (high speed)

/ 5

Ease of use

/ 5

Annual cost ($)

/ 5

About

The Alen BreatheSmart FLEX 4 + White is part of the Air Purifiers test program at Consumer Reports. In our lab tests, Room Air Purifiers models like the BreatheSmart FLEX 4 + White are rated on multiple criteria, such as those listed below.

Dust, pollen, smoke removal (low): How well a model clears air of dust and smoke when operating at a lower, quiet speed.

Dust, pollen, smoke removal (high): How well a model clears air of dust and smoke when operating at its highest speed.

Noise (low speed): How loud a model is at the speed used for Low Speed testing.

Brand Reliability & Satisfaction

#? in Reliability of all Room Air Purifier Brands

Did the brand perform consistently well over time?

PREDICTED RELIABILITY SCORE

/ 100

Predicted brand reliability scores are based on the likelihood of newly purchased air purifiers experiencing a problem, adjusted for extended warranty or service contract status and product usage, by the end of the 5th year of ownership. Higher scores mean better reliability. Ranked #? of 36

Would our members recommend this brand?

OWNER SATISFACTION SCORE

/ 100

Brand owner satisfaction scores are based on how likely owners are to recommend their air purifier to their friends and family. Ranked #? of 36

Source: Consumer Reports' 2022, 2023 and 2024 Summer Surveys

Features & Specs

Features

Filter-life indicator

Yes

Remote control

Auto fan speed

Smartphone app

VOC Sensor

High efficiency particulate air (HEPA) filter

Yes

Carbon

Yes

Ionization

Electrostatic

Plasma

Mechanical Filter

Specs

Annual Electricity Cost ($)

Annual Filter Cost ($)

Product type

HEPA/Carbon

Weight (lbs.)

Energy Star

Yes

Number of fan speeds

Particle Sensor Display

None

Pre-Filter Maintenance

Vacuum

Main Filter Maintenance

Replace

Price & Shop

Alen BreatheSmart FLEX 4 + White

CR Expert Take

Overall Score

What goes into the Overall Score?

About

Similar Products

Similar Products

Brand Reliability & Satisfaction

Brand Reliability & Satisfaction

Features & Specs

Features & Specs

Features

Specs

Price & Shop

Price & Shop

More From Consumer Reports