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Blueair Blue Pure 411 Review

Last updated September 14, 2022

This post may contain affiliate links.

Author avatar Paul Allen

Paul is our go-to-guy for air purifier and dehumidifier reviews. His apartment has become a de facto HouseFresh test lab where he pits the latest clean air technology against the perils of city center life. When he’s not putting a purifier through its paces, Paul likes to endlessly dig through dusty record shops (making his dust-free apartment even more important).

Our verdict:

 If your budget isn’t the highest, but you still want fresh, clean air for you and your family, you should seriously consider the Blue Pure 411 from Blueair. This funky little purifier contains a 3-stage filtration system that combats odors, VOCs, smoke, pollen, pet dander, and dust down to 0.1 microns in size, all while being incredibly energy efficient and operating at whisper-quiet volumes.

Born out of a desire to create a safer and healthier environment for his baby daughter, Blueair’s founder, Bengt Rittri, has been on a mission to revolutionize the air we breathe. Now, with over 25 years under their belt, Blueair can claim to be one of the biggest and best air purifier manufacturers around. 

Blueair have an array of purifiers on the market, from their Blue range of simple-to-use purifiers for everyday domestic use, to their Pro line, which provide unrivaled performance in large offices and industrial environments. What each Blueair purifier has in common, however, is they all utilize the same trademarked HEPASilent technology.

This technology combines electrostatic and mechanical filtration, which charges particles whilst airborne, making them easier for the HEPA and carbon filters to capture. Resulting in greater efficiency and the removal of 99.99% of pollutants.   

If you’ve done any kind of research into buying an air purifier before, you may well recognize the Blueair Blue Pure 411. Here at HouseFresh, we’ve featured this unit as part of our top recommendations for such issues as the Best Air Purifiers For Traffic Pollution, Best Air Purifiers For Home Office, and Best Air Purifiers Under $200.

As it’s clearly been on our radar for some time, I wanted to do a deep dive into the overall performance of this purifier and discover if it will live up to its impressive stats and specification. As with all the products reviewed here at HouseFresh, this purifier was bought with our own money, so you can rest assured this review will remain unbiased and objective throughout. 

TL;DR The Low Down on the Unit

No time to read the whole review? Here are our top takeaways from putting the Blueair Blue Pure 411 through its paces. 

What We Really Like:

👍 In my opinion, it looks really cool. Not just a standard white box like many others
👍 The one-button control makes it so easy to operate
👍 The low annual cost means you can run it for longer periods of time if needed
👍 It has a 360-degree intake to capture particles from all directions

What We Think Could Be Better:

👎 As it’s round, it doesn’t slot into the corner flush
👎 I would have preferred it to have a timer, so I could leave it running without worry

The Specifications

Currently available for $119.99, this purifier offers good value for a unit with a CADR score of 120 CFM. 
When searching for similar products on the market, you may also find the Levoit Core 200S for $89.99 which has a CADR score of 118 CFM, or the Medify MA-25 which has a CADR score of 135 CFM, which costs a tad more at $159.99. With not much to separate the price and spec of each unit, it will be interesting to see how the Blue Pure 411 measures up.

Purifier technology:Washable pre-filter, HEPASilent™ filtration technology including HEPA particle and activated carbon filter. 
CADR (CFM / m³/h):120 CFM
Recommended room size:161 ft²
Filter life:6 months
Noise level (low – high):17 – 43dB
Dimensions (in inches / in cm):16.7H x 8W x 8D inches / 42.4H x 20.3W x 20.3D cm
Weight (in pounds / in kg):5.3 lbs / 2.4 kg
Energy consumption:$21.72 per year

Bold yet Brilliant Design

When you think about an air purifier, you probably picture a big white box with a fan. The Blue Pure 411 on the other hand, is so much more when it comes to design. To start, its cylindrical body wouldn’t look out of place in a futuristic sci-fi movie. Plus, its external fabric pre-filter adds a bold splash of color, making it certainly stand out from the crowd. 

My 411 came with the original blue pre-filter, but there is a range of different colors available online. Allowing you to choose an option that best suits your home, or even opt for a range of colors to switch up the appearance of your unit as often as you like.

BLUEAIR Blue Pure 411+ Light Pink Pre-Filter, Washable Fabric Traps Pollen, Pet Hair & Dust, Crystal Pink
  • COMPATIBLE WITH BLUE PURE 411+: Genuine Blueair Replacement Pre-filter in Crystal Pink color for Blue Pure 411 air purifier (non-auto); not compatible with Blue Pure 411 Auto and 411 air purifier
  • FILTER LIFE EXTENSION: Colorful fabric pre-filter extends the life of the primary filter, catching large particles such as dust, lint, pollen and pet hair
  • NO COMPARISON: Genuine Blueair pre-filters are specifically designed to enable optimal air flow and performance over time; When combined with electrostatic filtration, this results in faster and quieter cleaning than traditional HEPA filtration
  • CLEAN WITH EASE: Vacuum the exterior of the fabric pre-filter to remove visible dust and dirt as often as you'd like and as-needed based on indoor air conditions
  • DESIGNED FOR REUSE: When the pre-filter requires a deeper clean, wash on a gentle, low-temperature cycle in the washing machine

The top section of the purifier is where you’ll find the fan and one button control panel. Its glossy white appearance contrasts with the color and texture of the pre-filter below and although simple, this design typifies Scandinavian attention to detail when it comes to form and function.

When placed alongside other purifiers, I think the Blue Pure 411 really comes into its own. Granted, it may not be to everyone’s taste, however its unique shape, bold color and simple design make it one of the best-looking units out there. 

Speedy Setup but Make Sure to Use a Light Touch

After ripping into the packaging, I found the purifier was well secured without using excessive plastic or waste material. Once everything was unboxed, it was easy to figure out how to unscrew the top fan section from the body, then slot the combo filter in place and pull on the pre-filter before reassembling. All that was then left to do was plug the unit into the mains power and hit the on switch.

Blueair hasn’t wasted any space with a large casing or grill, but this does mean you have to handle it with a bit more caution once you’ve finished setting it up. Don’t go squeezing or grabbing the unit by the filter section as it has the potential to damage easily.

High-tech Filtration that Captures 99.99% of Pollutants

The Blue Pure 411 comes with a three-part filtration system consisting of a washable fabric pre-filter and a HEPASilent filter, which combines a classic HEPA filter for particulate matter and an activated carbon filter that takes care of any unwanted household odors that occur from cooking, pets, or even smelly shoes or laundry.

You may be familiar with HEPA filters, as they are the industry standard among air purifiers nowadays. Capable of capturing 99.97% of particles down to 0.3 microns (basically the size of dust) this filter will leave the air in your home feeling fresh and allergen-free. 

You’ll also find a pre-filter to capture large particles such as hair or lint, which you can wash and reuse. Along with an activated carbon filter that tackles VOC’s, such as odors and gasses, through a process known as adsorption. 

Where the Blue Pure’s filtration differs from other purifiers, though, is due to Blueair’s patented HEPASilent technology. This combines mechanical filtration (from the HEPA and carbon filters) with electrostatic filtration, which charges airborne particles making them essentially stickier, so when they pass through the HEPA filter they are easier to capture, thus making the unit more efficient. 

Although you’ll no doubt be in a hurry to get your unit up and running, if you do, in fact, decide to purchase one, it’s important to ensure you’ve removed all plastic covers from the filters before switching on your purifier. Otherwise, you may end up with more pollutants in the air than when you started. 

One Button to Rule them All

If you happen to be a technophobe or simply like minimalism, the 411 couldn’t be simpler to use. 

Its one-button operation means you don’t need to find your way around a console or read the instructions before use. Simply press the big, central button once to turn the unit onto the first speed setting.

Press again for speed setting two. And again for the top speed.

There are three lights that indicate which setting you’re currently on and also let you know when it’s time to change your filter. These lights do dim after a while, so they’re not intrusive to sleep, although I think it would be better if you had the option to turn them off entirely.

While this control panel offers a simple plug and play operation, if you like gadgetry you might be left longing for some additional features as there is no timer, auto mode, or air quality sensor on this model.  

Particle Busting Performance in Just Over an Hour

Now let’s get down to brass tacks. While this purifier may be easy on the eye and simple to operate, it must be able to effectively remove airborne pollutants if it’s to get the HouseFresh stamp of approval. 

So, in order to determine just how good this purifier is, I set the unit up in our trusty home office, which also happens to be the HouseFresh testing laboratory. This is a 705 cubic foot space, so around the size of the average bedroom, and is the same space where we carry out all of our real-world tests.

To compare each purifier equally, we use the same means of creating polluting particles, which is by burning incense sticks. As well as using the same means of measuring our results, using our Purpleair indoor air sensor, which provides real-time feedback on PM1.0ug/m3, PM2.5ug/m3, and PM10.0ug/m3 levels.

With the stage set, I lit the incense and waited for particle readings to peak. At which point, our air sensor indicated levels read as follows:

PM 10.03245.74
PM 2.52337.34
PM 1.0434.69

I then switched the purifier onto its highest speed setting and started the stopwatch. 

From 18:58 when pollutants were just past their highest reading, the Blueair Blue Pure 411 made a speedy start, with levels of all particles reading below 5 ug/m3 within 44 minutes. 

Then, by 19:06 the levels of the smallest particle (PM1.0) had reached 0.0ug/m3. Taking 68 minutes to eradicate all traces of airborne particles, leaving only clean and healthy air in the room.  

But how does this result compare to other units with similar specifications and price tags?

Air PurifierCADR (CFM)CostPerformance in Test  (in minutes)
Levoit Core 300135$99.9940
Medify MA-25135$159.9958
Levoit Core 200S118$89.9961
Blueair Blue Pure 411120$119.9968

Well, it doesn’t quite take the gold medal (or silver or bronze for that matter) but it’s fair to say that it was a closely contested race, with only a few minutes separating the different units.   

Where the Blue Pure does come out on top, however, is when we tested how much sound it produces. Thanks to the HEPASilent technology, this unit is one of the quietest purifiers on the market. 

On its lowest setting, you will barely even notice that it’s running, emitting just 17 dB. At first, I didn’t really trust it was actually doing anything on this setting as it was so quiet. But after having it on for an hour, you can tell that it is definitely doing its job, just super sneakily. 

Hear just how quiet it is for yourself below:

Efficient Filtration Makes This a Wallet-Friendly Choice

1. Electricity costs

When energy prices move around as much as a motorized yo-yo, you want to know that the price of clean air isn’t going to bankrupt you. Luckily, all of Blueair’s purifiers are Energy Star certified, so won’t impact your electricity usage too much.

In fact, thanks to the highly efficient HEPASilent technology, Blueair’s filters work excellently on lower speeds, resulting in much lower bills. If I use my 411 for 8 hours per day, it will cost me around $5 to $7 annually, and even if I left the unit on full power, 24/7, I would still only expect my bill to go up by approximately $22 a year. Which is peanuts for the results it gives.

2. Filter costs

In addition to electricity use, it’s important to consider how much you will pay for replacement filters in the long run. As HEPA and activated carbon filters have a finite lifespan before becoming clogged up with particles, so you will need to replace them regularly. 

Blueair states that the 411 filter will need to be replaced after 6 months of continuous use. If, like me, however, you only use your purifier when at home, you can expect these filters to last as long as a year. But of course, that will vary depending on how much pollution is in your immediate environment.  
Filter replacements are easy to come by, at the time of writing they cost around $22 from Amazon. This proves to be cheaper than other manufacturers, with the average Levoit filter costing between $30-40.

BLUEAIR Blue Pure 411 Auto, 411, 411+ Genuine Replacement Filter, Particle and Activated Carbon, fits Blue Pure 411 Auto, 411 and 411+ Air Purifiers
  • COMPATIBLE WITH ENTIRE BLUE PURE 411 AIR PURIFIER LINE: Blueair Combination Particle plus Carbon Replacement Filter compatible with entire Blue Pure 411 air purifier line consisting of Blue Pure 411 Auto, Blue Pure 411, Blue Pure 411 plus air purifiers
  • FILTERS BUILT TO LAST: Using a 360-degree air intake and up to 4x the filter surface area the Genuine Blue Pure 411 Particle and Activated Carbon Filter lasts on average 6 months to a year; optimizing air flow and performance over time
  • RECYCLABLE: Please check your local recycling facilities for availability
  • AUTOMATED FILTER REPLACEMENT: Subscribe & save up to 10% on auto-delivered filters when replacement is needed; We recommend replacing your filter about every 6 months when used 24 hours a day
  • REMOVES EVEN TINIEST AIRBORNE PARTICLES DOWN TO 0.1 : Particle filter removes airborne particles such as pollen, pet dander and dirt from your indoor environment

Bottom Line

Blueair is one of the most popular brands of air purifiers on the market, and it’s easy to see why. The 411 doesn’t need to boast about the latest technological bells and whistles like Wi-Fi connectivity or cell phone app control. It’s there to do a job and to do it well. 

As I wanted this unit for the bedroom, I knew I needed a smaller unit that was ultra-quiet. And this is it. I don’t have to mess around with different settings or features, just press one button, and you’re away. It just so happens that my bedroom walls are blue, so it matches up, but having the option of different colors is a big plus. Not to mention the long-term savings that will be made through energy efficiency and cheap filter replacements. 

Although it may not be the fastest purifier on the market, I still believe it meets the needs of the average bedroom or small room. Of course, if you suffer from allergies or own a pet, you may wish to opt for a different purifier that comes with a bit more oomph. In which case, the Levoit Core 300 at $99.99 would offer a fine alternative.

The Rules We Followed When Reviewing the Blueair Blue Pure 411

Our goal is to help you have a clear understanding of which air purifiers are great and more importantly, uncover which ones you should avoid. 

That’s why:

1. Each purifier that has been reviewed on HouseFresh, such as the Blue Pure 411, has been bought with our own money and performed performance testing in our own home.

2. We don’t base our opinion on the manufacturers’ feature lists or specification figures. We carry out hands-on tests, so we can judge the performance in real-world conditions with our own testing tools.

3. We used our testing data to compare the Blue Pure 411 like for like with other similar air purifiers in the market. 

4. We evaluated the long-term benefits and downsides of using the Blue Pure 411, putting the unit to the test for over 6 months.

Our Testing Process 

As consumers, we always research CADR rankings and other performance metrics published by the manufacturers, but we don’t like to leave it at that. 

We wouldn’t be able to recommend a unit without being 100% confident we are making the right call without our real-life performance testing. 

That’s why we test all the models we review here at HouseFresh in the same room (sized 705 cubic ft) performing the same job (removing incense smoke). This allows us to compare units side by side.

We use the PurpleAir PA-I Indoor PM 2.5 Sensor that combines the ability to track PM1.0ug/m3, PM2.5ug/m3, and PM10.0 ug/m3 every few minutes. 

We then can visualize this data using Flourish to help us clearly work out how long it took this specific unit to remove all pollutants from the air.


We calculated the monthly energy consumption costs with the help of our air purifier electricity usage calculator. We calculated daily and yearly costs associated with running an air purifier for 24hs a day in California. You can customize the result by air purifier wattage and by state. 

Last update on 2023-01-28 / Affiliate links / Images from Amazon Product Advertising API