Blueair 121 vs 211+ Trusted Comparison (2023)

It’s no secret that clean air is essential for our health and well-being, so when choosing an air purifier for your home, you want to be sure you’re getting the best quality product possible. 

This can be difficult when looking online – dozens upon dozens of different models are available! If you’ve been comparing the Blueair 121 vs 211+ air purifiers.

This blog post is for you – we’ll take a look at some of their key features and discuss why one might suit you better. Whether you opt for a Blueair 121, rest assured that either option will bring cleaner breathing air into your home in no time!

Key Difference Between Blueair 121 vs 211+ Air Purifiers:


  • Design
  • Coverage
  • Filter System
  • Energy Consumption
  • Noise Level
  • Blueair 121 Optional Extra Protection Filter
  • Blue Pure Performance

Comparison Table of Blueair 121 vs 211+

Specifications Blueair 121 Blueair 211+
Room Coverage 620 square feet 540 square feet
CADR 400 cubic feet 350 cubic feet
Filters HEPASilent Technology+Activated Carbon Filter HEPASilent Technology+Activated Carbon Filter
Extra Protection Filter Yes  No
Energy Consumption 20 watts 47 watts
Noise Level 57 decibels 59 decibels


When comparing the Blueair 211+ and 121 air purifiers, it’s easy to see that they both boast a sleek and box-like design, with a width and depth of 13 inches each. However, upon closer inspection.

It’s evident that the 121 model appears slimmer and more compact in design, thanks to its slightly smaller height of 20.3 inches compared to the 121’s height of 28 inches. 

Despite being heavier than the 211+, the 121 model is still incredibly portable and an excellent option for a powerful air purifier.

Blueair wants to create a product that improves air quality and doubles as a stylish home decor item suitable for any modern or contemporary home.

Room Coverage:

When it comes to the coverage of these two fantastic air purifiers, there is a slight difference between them. Both models can purify large rooms, up to a whopping 700 square feet! With three-speed control options.

The AHAM rate for the 121 models is 620 square feet, while the Blueair 211+ model has a slightly lower rate of 540 square feet. Regarding CADR, the 211+ air purifier is a powerhouse capable of cleaning 350 cubic feet of pollen, smoke, and dust per minute. 

But wait, it gets even better! The Blueair 121 model takes it up a notch with an even higher clean air delivery rate, removing all harmful particles in just one minute for a room of 400 square feet.

When choosing an air purifier for your home, it’s essential to consider the size of your living space and the speed at which you want it to clean the air. The Blueair 121 is the perfect fit for bigger homes requiring a faster rate. But of course, it’s all about personal preference. For me, the Blueair 121 is the clear winner.


The Blueair 121 and 211+ air purifiers utilize HEPASilent Technology to provide clean, fresh air for your home. This innovative technology uses two layers of particle filters and an activated carbon layer to trap smoke and odors effectively.

The Blueair 121 or 211+ machines also use Electrostatic Precipitation, making pollutants and particles sticky and easily trapped in the filters. This results in quiet and energy-efficient operation so you can breathe easily without any added noise or cost.

Blueair 121 vs 211+

But here’s where the Blueair 121 model takes the lead – it features an upgradeable carbon filter. This extra layer of protection is perfect for eliminating even the most pungent odors, thanks to the activated coconut carbon pellets. Meanwhile the carbon filters in the Blueair 211+ model only absorb milder scents.

Both models will work perfectly in your home, but the Blueair 121 is the clear winner if you want extra odor elimination. I doubt that it is the superior choice.

Blueair 121 Optional Extra Protection Filter:

The Blueair 121 offers extra protection that you won’t find with the Blueair 211+. While both air purifiers come with a standard Combination Particle + Carbon filter designed to handle light household odors. 

The Blueair 121 takes things to the next level with its additional protection filter. This extra filter is packed with activated coconut carbon pellets and is designed to absorb heavy gases, odors, and chemicals that may be present in your home.

So, if you’re looking for a way to combat stubborn and heavy household odors, upgrading your carbon filter to the extra protection filter in the Blueair 121 is the way to go.

The Blueair 211+ vs 121 models offer exceptional air purification, but if you’re looking for maximum protection against household odors, the Blueair 121 is the way to go.

Energy Consumption:

The Blueair 211+ and 121 models are two popular air purifiers that use advanced technology to clean the air of dust, pollen, pet dander, mold spores, and other airborne particles.

One crucial factor to consider when selecting an air purifier is power consumption. The Blueair 211+ has a maximum power rating of 47 watts, while the 121 model has a maximum power rating of 20 watts. 

This means that the 211+ will consume almost twice as much electricity as the 121 models to function at total capacity. However, both models have energy-saving modes which can help lessen their overall energy consumption.

Noise Level:

The Blueair 211+ and 121 have the same noise levels on the lowest setting, which is about 24 decibels. On the highest stage, the 211+ has slightly higher noise levels than the 121, with a maximum of 59 decibels compared to 57 decibels for the 121.

The 211+ also features advanced silence technology that allows it to adjust its fan speed based on air quality levels automatically. When air quality is inferior, it can increase its fan speed to boost purification performance while still keeping noise levels low. 

The 121 doesn’t have this feature, so it always runs at a consistent level regardless of changes in air quality. The 211+ also has an advanced noise-absorbing foam housing that reduces sound reverberation. Making it even quieter than the 121. Both air purifiers feature an energy-saving mode that reduces their noise by up to 25%.

Blue Pure Performance:

The Blueair 121 is an absolute air-cleaning powerhouse! With a Clean Air Delivery Rate(CADR) of 400 cfm, it breezes through your room, whisking away harmful particles like smoke, dust, and pollen in no time! This gives your home clean and pure air in just a few minutes.

On the other hand, the Blueair 211+ is no slouch, either! With a CADR of 350cfm, it still packs a punch, making sure that your home is a clean and healthy environment.

The independent AHAM Verification Program has rigorously evaluated the Blueair 121 and 211+, making sure that their performance meets the highest standards. So whether you’re looking for speed or efficiency, either of these devices will make your home a happy and healthy place.

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Similarities Between Blueair 121 vs 211+:

  • Blueair 3 Stage Filtration
  • Filter Replacement Indicator
  • Low Energy Consumption
  • Blueair Guarantees Sleep Without Disruption

Blueair 3 Stage Filtration:

The Blueair 121 vs 211+ air purifiers have a powerful three-step filtration system that ensures you breathe only the cleanest air possible. This system eliminates 99% of airborne pollutants such as allergens, smoke, pet dander, mold, and household odors.

The three-step filtration process is as follows:

Washable Fabric Pre-filter: This pre-filter is the first line of defense and traps larger particles from the air. It also has the added benefit of extending the life of the primary filter and comes with two washable pre-filters that can be changed to match your home décor.

Particle + Carbon Filter: This filter features an activated carbon layer that efficiently removes common household odors like cooking smells, smoke, and pet odors. It is also highly effective against smoke from wildfires.

HEPASilent Filter: This is the heart of the filtration system, removing 99.97% of airborne particles with the help of HEPASilent technology. The technology uses a combination of electrostatic and mechanical filtration, which charges the particles before they reach the filter, making them easier to trap.

Thanks to this unique dual filtration, the Blueair 121 and 211+ air purifiers are highly effective, quiet, and energy-efficient. The HEPASilent technology allows lighter filters that require less air pressure, making these air purifiers stand out from the crowd.

Filter Replacement Indicator:

There is a built-in LED warning system in 121 and 211+ air purifiers. This LED warning system helps the owner to remind him about the filter changing time. The LED indicator will display a yellow light when the filter needs to be replaced. This feature is known as Filter Replacement Indicator.

In Blueair 211+, the filter replacement indicator has four levels of status: Green-Good, Yellow-Change, and Red-Replace. When the air purifier detects that it’s time to replace the filter, it will display a yellow light on its screen, and an alarm will sound. This indicates that it’s time to replace the filter.

For Blueair 121, there is only one level of status: Yellow-Change. When the air purifier detects that it’s time to replace the filter, it will display a yellow light on its screen, and an alarm will sound. This indicates that you should immediately replace your old filters with new ones to maintain optimal filtration performance.

Low Energy Consumption of Blueair 121 vs 211+:

The Blueair 121 and 211+ air purifiers offer the perfect combination of top-notch air quality and energy efficiency. Both air purifiers boast a low energy consumption of just 42W and 64W at maximum power, making them some of the most energy-efficient air purifiers on the market. 

This means that you can breathe easy knowing that your electricity bills will stay low, even as you enjoy clean, fresh air in your home. So, if you’re looking for a stylish and practical air purifier, the Blueair 121 or 211+ are the perfect choice for you.

Sleep Without Disruption of Blueair 121 vs 211+:

Sleep soundly with the Blueair 121 and 211+ air purifiers, designed to provide a peaceful and uninterrupted night’s rest. With whisper-quiet noise levels of only 32db at their lowest speed, these air purifiers are the perfect addition to your bedroom or any quiet space where peace is a must.

And even at their highest rate, the Blueair 121 or 211+ produces a maximum of only 56dB of sound, equivalent to light. They no longer disturb your sleep with loud operating noises – the Blueair 121 and 211+ promise a tranquil environment to rest and rejuvenate.


Experience the ultimate indoor air quality with the Blueair 121 vs 211+ air purifiers – two options designed to exceed your expectations. If you’re seeking a more discreet opportunity that won’t disturb your peace.

The Blueair 121 is the perfect choice with its whisper-soft noise levels of only 32db at its lowest speed and ability to fit seamlessly into smaller spaces. Meanwhile, if you’re looking for powerful air filtration and coverage for larger rooms.

 The 211+ is the ideal option, delivering superior performance without sacrificing energy efficiency. Whether you’re looking for clean air in your bedroom or living room, the Blueair 121 vs 211+ covers you. Elevate your home’s air quality with these top-performing air purifiers, and enjoy a healthier, more comfortable living space.


Is Blueair 121 a HEPA?

Yes, the Blueair 121 air purifier is equipped with HEPA and activated carbon filters capable of removing 99.97% of all airborne particles down to 0.1 microns in size, including dust, pollen, smoke, pet dander, mold spores, and other allergens. It also comes with a pre-filter to capture larger particles.

What is the difference between Blueair 211 and 211+?

The Blueair 211 air purifier is a highly efficient air purifier designed to deliver clean air in medium-sized spaces. It features an easy-to-use control panel, a pre-filter, and two HEPASilent filters for superior filtration of pollutants. The 211+ model takes this one step further by including an extra-long filter, a higher fan power, and a built-in Filter Replacement Indicator.

Is Blueair better than HEPA?

Yes, Blueair air purifiers are generally superior to traditional HEPA air purifiers in terms of filtration performance and energy efficiency. The advanced HEPASilent filter used in Blueair air purifiers can remove more pollutants from the air than a standard HEPA filter while also consuming less energy.

Is the Blueair 211 worth it?

Yes, the Blueair 211 is worth it. It offers superior filtration of pollutants and allergens, features an easy-to-use control panel, and includes a built-in filter replacement indicator to let you know when it’s time to change the filters. The 211+ model takes this further with its extra-long filter and higher fan power.