Blueair Blue Pure 211+ air purifier review: an efficient, quiet air purifier with customizable filters

The Blueair Blue Pure 211+ boasts powerful performance and impressive eco-credentials, but it lacks the looks or extra features of more expensive air purifiers.

Blueair Blue Pure 211+ being tested in writer's home
(Image: © Future)

Top Ten Reviews Verdict

The Blue Pure 211+ is a reliable, high-performing air purifier, combining energy efficiency with simple design and functionality.


  • +

    Low energy consumption

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    Powerful performance

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    360-degree air intake

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    For larger homes and offices


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    No Smart features or functionality

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    Bulky design

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In this review, we’ll examine the Blue Pure 211+, from its performance in our at-home testing to its appearance. We’ll also give you the lowdown on features and functionality so you know what to expect. If the Blue Pure 211+ isn’t the right purifier for your home, you’re bound to find the perfect fit in our best air purifier buying guide. 

Blueair Blue Pure 211+: Key Specs

Dimensions: H 21 in, D 13 in, W 13 in

Weight: 15.5 lbs

Filters: Unique HEPASilent™ filtration system  

Max noise: 56 dBs

Max power use: 61 Watts

Coverage: 540 sq feet

Modes: 3

Warranty: 1-year extendable warranty (up to 5 years)

Energy Star Certified: Yes 

The Blue Pure 211+ features a unique HEPASilent™ filtration system, which means this purifier can maintain a powerful performance while consuming less energy. The combination of electrostatic and mechanical filtration also allows for a quieter performance.

The Blue Pure 211+ comes with an optional, customizable fabric pre-filter sleeve to help trap larger particles and extend the life of the air purifier’s filter. It also includes an activated carbon filter to absorb volatile organic compounds (VOCs) from household chemicals, such as cleaning products or adhesives. Activated carbon filters can also help eliminate odors from tobacco, cooking, or pet odors.  

Boasting a 360-degree air intake, the Blue Pure 211+ can be placed in the middle or at the edge of any space without losing power or performance. A six-foot cord is supplied, allowing enough leeway for most sockets. 

Blue Pure 211+: Price & availability

  • $299.99 / £221.59 
  • 1-year extendable warranty (up to 5 years) 

The Blue Pure 211+ can be purchased directly from or via other selected retailers such as Home Depot or Amazon. Its price places this air purifier towards the more expensive end of the market, with many cheaper options available. 

However, as our at-home testing shows below, you get what you pay for. Plus, it’s much cheaper than other air purifiers that offer a similarly large square footage capability, such as the Dyson Purifier Cool, which retails for around $549.99.

Blue Pure 211+: Setup

The manual that comes with the Blue Pure 211+ is easy to understand and features plenty of helpful pictures to help you set up and operate your new purchase.

Setting up the air purifier is pretty straightforward. Remove the top of the unit by pressing the two release buttons on either side and fit the filter sleeve. The HEPA filter is already in place. 

Two fabric sleeves of different colors (blue and black) are provided with the air purifier, so you can switch them to blend in with your home decor. Other colors are available to buy separately, and of course, you can choose not to use the fabric sleeve if you prefer a clean, white look. 

Replace the top of the unit before plugging it in and powering it on. A large touch-sensitive power button at the front of the purifier turns it on and allows you to select your preferred setting. 

There are three settings to choose from. The lowest setting is also the most energy-efficient, operating around 38 decibels. This is around the same noise level as a quiet library. The middle setting is 49 decibels, similar to the sound of rainfall, while the loudest and most powerful setting is 56 decibels, roughly the same level as background music. 

The Blue Pure 211+ also has eco-credentials. It is Energy Star certified, top-rated by Consumer Reports, and AHAM-verified for performance and Clean Air Delivery Rate (CADR). 

The Blue Pure 211+ can service spaces of up to 540 square feet, making it ideal for homes with larger rooms and office spaces. 

Blueair Blue Pure 211+ being tested in writer's home

(Image credit: Future)

Blue Pure 211+: Design

At 15.5 lbs, the Blue Pure 211+ is the heaviest and bulkiest air purifier we tested at home. It’s not the easiest air purifier to lug around the house, so it may be best for users who want a sturdy air purifier that can sit in one place. 

However, it’s not without style. An attractive stencil cut-out at the top of the unit adds a touch of flair to this workhorse of a machine, while the customizable fabric sleeves can be selected to your taste and home decor. 

Despite its bulk, the unit has a clean and stylish finish. Leaving the fabric sleeve off reveals the mesh base, which is perfectly acceptable in appearance, although it may get dusty over time. 

Blueair Blue Pure 211+ being tested in writer's home

(Image credit: Future)

Blue Pure 211+: Performance

We tested the Blue Pure 211+ at home over three 30-minute trials, using an air particle counter before, during, and after testing. All tests took place in a sealed room measuring 323 square feet.

Our first trial tested the Blue Pure 211+’s ability to tackle ambient air quality. After running the purifier for 30 minutes at a setting lower than 50 decibels (setting 2), we found that it absorbed 93% of particles smaller than 0.3 microns and 88% smaller than 2.5 microns. At its highest setting, it absorbed 99.9% of particles smaller than 0.3 microns and 100% smaller than 2.5 microns. We also found it absorbed 100% of particles measuring smaller than 10 microns. 

Next, we evaluated how well the Blue Pure 211+ handled incense smoke. At levels 2 and 3, it absorbed an impressive 99% of particles smaller than 2.5 microns and almost 100% of particles measuring smaller than 10 microns. 

Lastly, we tested how well the purifier absorbed particles released by burning matches. At level 2, the purifier eliminated 99.7% of particles smaller than 0.3 microns, 99.5% of particles smaller than 2.5 microns, and 100% of particles measuring smaller than 10 microns. At level 3, this increased to 99.9% of particles smaller than 0.3 microns, 99.6% of particles smaller than 2.5 microns, and 100% of particles measuring smaller than 10 microns.

Having evaluated several air purifiers at home, using exactly the same tests, we can confidently say that the Blue Pure 211+ is one of the most powerful and effective air purifiers we tested. It outperformed most other purifiers, including the much more expensive Dyson Purifier Cool.

Blueair Blue Pure 211+ being tested in writer's home

(Image credit: Future)

Blue Pure 211+: User reviews

Users tend to rave about the Blue Pure 211+. It scores an impressive 4.8 out of 5 stars on Home Depot, with hundreds of 5-star reviews from happy customers. The website tells a similar story, with hundreds of 5-star reviews and an overall score of 4.7 stars. With over 10,000 reviews on, 82% of users give it the full five stars.

Positive reviewers enjoy the performance of the Blue Pure 211+. They say it improves sleep, eases allergy symptoms, and leaves their home air feeling clean and fresh. They also praise that it’s energy-saving and quiet at its lowest setting. 

The few negative reviews tend to cite problems with individual devices. However, some say the replacement filters are too expensive, at around $69.99, which potential buyers need to factor into the overall cost. Plus, some people find the highest setting too noisy for their home. 

Should you buy the Blue Pure 211+?

While the Blue Pure 211+ may lack Smart functionality, it delivers on performance. If you’re looking for something sturdy and powerful but energy efficient, it could be the right purifier for your family home.

It’s not cheap, at $299.99. And its bulk and left may put some buyers off. However, when it comes to results, it surpasses most of the air purifiers we’ve tested so far, so you get good value for your money. 

How does the Blue Pure 211+ compare?

If you’re after an air purifier with a similar performance level in a lower price bracket, the Levoit Core 400S is almost $100 cheaper and performs well in our at-home tests. 

Check out the Dyson Purifier Cool if you want an air purifier with the wow factor and money as no object. Sleek and stylish, it’s certain to be a talking point in any home. 

The KOIOS EP1810 may be the perfect fit for people with limited space and budget. Small enough for a desktop or shelf, it’s light enough to take on business trips and vacations. 

Joanne Lewsley
Customer Advisor, Vacuums, Cleaning and Air Quality

Joanne Lewsley is a UK-based freelance writer and editor, covering health and lifestyle news and features. She creates evidence-based health and parenting content and has worked with some of the world’s best-known brands and websites, including BabyCentre UK and Medical News Today. 

You can read more of Joanne's work and get in touch via her website: