Blueair Blue Pure 121 Review: A Simple-to-Use Purifier That Works

Throughout its product line-up, Blueair offers some pretty good examples of how minimalism and simplicity can result in a highly functional unit.

For example, the Blueair Classic line has the Classic 605 as its top-of-the-line air purifier. The Blue family, on the other hand, has the Blue Pure 121 as its flagship model and the family’s pride and joy – and for a good reason, too. 

If you’d like to learn about the features and benefits – and any potential downsides – be sure to read my Blueair Blue Pure 121 review!

Blueair Blue Pure 121 Air Purifier

Our Rating: 93/100


If you’re interested in a relatively compact, straightforward, and easy-going – and might I add, good-looking – air purifier that does wonders for improving indoor air quality, rest assured that the Blue Pure 121 from Blueair is the air purifier for you.

Blueair Blue Pure 121 Specs & Features 

Blueair Pure 121 Air Purifier
Dimensions 28 x 13 x 13 inches 
Weight 18 pounds 
Coverage 620 square feet 
CADR (Dust/Pollen/Smoke) 400/400/400
Filter Configuration Three-stage filtration 
Air Flow Control Three fan speeds 
Timer No 
Warranty Up to 5-year warranty 
Price $439.99


  • Three-Stage Filtration System – This air purifier features a pre-filter, particle filter, and an activated carbon filter to eliminate up to 99 percent of airborne pollutants, odors, and smoke.
  • 360-Degree Air Intake – A 360-degree air intake sits underneath a colorful fabric pre-filter, ensuring that it takes in air from all directions, regardless of placement. 
  • One-Button Control – Instead of a complicated control panel, the Blueair Blue Pure 121’s single button allows you to set the desired fan speed and acts as a filter replacement indicator. 
  • 620-Square-Foot Coverage – Large rooms, offices, and open-concept spaces benefit from the 620-square-foot coverage, with 400/400/400 CADR ratings, and five air changes per hour. 

Blueair Blue Pure 121 Review: An Honest & Unbiased Look

The Blue Air Pure 121 is an air purifier devoid of flashy tech – it doesn’t have a sensor, a timer, or any automatic functions. 

You won’t feel like something is missing, though. 

As you’ll see in this Blueair Blue Pure 121 review, it still does what it’s supposed to – purify and improve indoor air quality! 

Unboxing the Blueair Blue Pure 121 Air Purifier: Design & First Impressions

The Blue Pure 121 is, in essence, a super-sized version of its little sibling, the Blue Pure 211. 

Now, when I say “super-sized,†I mostly refer to the purifier’s height – the Blue Pure does measure 28 x 13 x 13 inches. Still, at 18 pounds, it’s reasonably lightweight; moving it around the house shouldn’t be a problem. 

Also, it’s hard to ignore how attractive this air purifier is – and I’m not talking about the sole construction, either: 

The fabric pre-filter that wraps around the entire air purifier is available in five different colors. You’re free to switch things up and change the color to match the room’s décor whenever you feel like it! 

This pre-filter is also a pretty good indicator of the size of the air intake beneath it. The Blue Pure 121 features a 360-degree air intake for maximum efficiency – no need to worry about placement – with the outlet sitting on top. 

The most significant benefit of this simple design is the unmatched ease of use: 

There are no knobs or overly complicated control panels on this air purifier – only a single button that does it all. 

Putting the Blueair Blue Pure 121 to Work: Performance & Effectiveness

When I look at the Blue Air Pure 121, “simple†and “strong†are the words that come to mind. 

The powerful fan that sucks in the air through the 360-degree intake performs five air changes per hour, with impeccable CADR ratings of 400/400/400 cubic feet per minute for pollen, dust, and smoke. 

And as if that weren’t impressive enough, it also has a 620-square-foot coverage area! 

Besides the actual fan – which, by the way, has three available speed settings – another critical aspect of its performance is, of course, the filtration system. 

You see, the Blue Pure 121 employs three-stage filtration: 

I already talked a bit about the washable fabric pre-filter, but adding to that are the polypropylene fiber particle filter – an alternative to the true HEPA technology – and the activated carbon filter. 

Together, they capture up to 99 percent of airborne pollutants and eliminate smoke, household odors, and VOCs, as well. 

Some of you may be worried about the noise levels, and while you can’t expect an air purifier as powerful as this one to remain dead silent, the noise is kept at an acceptable level: 

The lowest fan speed is almost whisper-quiet at 31 dB and doesn’t go over 56 dB, even at the highest setting.

Blueair Blue Pure 121 Air Purifier: Pros & Cons to Keep In Mind


  • Three-stage filtration eliminates pollutants and odors
  • Washable fabric pre-filter in five different colors 
  • A 620-square-foot coverage 
  • Easy-to-use, single-button control 
  • 360-degree air intake 
  • Three available fan speeds 
  • LED warning for filter replacement 


  • Doesn’t use a true HEPA filter 
  • Doesn’t have a timer or an integrated air sensor 

Decision Time: Is Blueair Blue Pure 121 the Best Air Purifier for You?

I started this Blue Air Pure 121 review by calling this air purifier the Blue family’s flagship model – and I still stand by what I said. 

Some of you may still be wondering about several high-tech features missing from its design, but let me ask you something: 

Would you go for all those bells and whistles? 

Or would you prefer one with the one-button operation, three-stage filtration, and industry-leading CADR and ACH ratings? 

That’s what the Blueair Blue Pure 121 brings to the table!

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