Levoit Core 400S Vs Blueair 211+ – Battle Of Titans!

In today’s comparison, I will analyze two big rivals: the Levoit Core 400S and Blueair 211+ air purifiers. These are two fantastic air purifiers, often compared among users, so I will be more than happy to compare them in detail and declare a winner.

Blueair 211+ Vs Levoit Core 400S - Hands-on comparison
Photo: Airpurifierfirst.com / Milan Antonic

When it comes to the quality of workmanship, I must say that both air purifiers built quality is extremely good. Blueair is a minimalistic air purifier and doesn’t have many advanced features, while Levoit is feature-rich and totally opposite to Blueair. Levoit is available in white, with the top part in black. On Blueair, the base is white, but it has the pre-filter, which is available in as many as 5 different colors, and most interestingly, the pre-filter takes up almost two-thirds of the device.

Not only that but also the room coverage differs. The Levoit Core 400S covers rooms up to 403 sq. ft., while the Blueair 211+ covers slightly larger rooms up to 540 sq. ft. 

To find out more, keep reading and get a broader picture of the differences between these two air purifiers based on all the tests I performed, including the specifications, performance, noise tests, and electricity consumption. And certainly and inevitably, in the end, I will determine the one that is a better choice for the purchase.

Blueair Vs Levoit Specifications

Blueair 211+ Air Purifier Levoit Core 400S Air Purifier
Manufacturer Blueair Levoit
Model 211+ Core 400S
Dimensions 20.5 x 13 x 13 inches (52,2 x 33 x 33 cm) 10.8 x 10.8 x 20.5 inches (27,4 x 27,4 x 52 cm)
Room Coverage 540 sq. ft. (50 m²) 403 sq. ft. (37 m²)
Performance Ratings
Filtration Technology Washable Pre-filter, Particle Filter, Carbon Filter, and HEPASilent Pre-filter, True HEPA Filter, and Activated Carbon Filter
Filter Replacement Indicator Yes Yes
Filter Longevity about 6 months up to 12 months
Power 61W 38W (24W European Model)
Operating Costs Ratings
Working Modes 3 – Low Mode, Medium Mode, and High Mode 5 – Sleep Mode, Low Mode, Medium Mode, High Mode, and Turbo Mode
Air Quality Sensor No Yes
Air Quality Indicator No Yes
Auto Mode No Yes
Smart App No Yes
Voice Control No Yes
Noise Levels 43.9 – 59.7 dBA 42.1 – 59.9 dBA
Noise Ratings
Warranty 2-year 2-year
In-Depth Review Blueair 211+ Levoit Core 400S
Price Check Price on Amazon Check Price on Amazon

Features Overview

Blueair literally doesn’t have any advanced options and can hardly compete with Levoit regarding features.

Levoit Core 400S Vs Blueair 211+ Air Purifiers- Comparison
I tested Levoit and Blueair performance with a Temtop laser particle meter. Photo: Airpurifierfirst.com / Milan Antonic

Advanced options such as a smart app, air quality sensor, air quality indicator, and the like are just some of many that stand out on Levoit, which I will explain in more detail below.

Air Quality Sensor and Indicator

Levoit uses an advanced sensor that detects dust particles in real-time. The sensor is located on the back and has a stand-alone motor that allows it to work even when the air purifier is off.

Levoit Core 400S Air Quality Sensor
Levoit Core 400S Air Quality Sensor. Photo: Airpurifierfirst.com / Milan Antonic

Readings from the air quality sensor are shown on display, via round LED indicators around the display, and, of course, on the smart app.

On the contrary, the Blueair 211+ does not have this option, but a new model recently came on the market, the Blueair 211+ Auto, which has an air quality sensor built-in.

Auto Mode

The Levoit Core 400S has an auto mode that works in accordance with the air quality sensor. In essence, when on auto mode, Levoit will switch the fan speed depending on the current air quality.

Levoit Core 400S Vs Blueair 211+ - Controls
Levoit has a control panel located on the top, while Blueair has just one button for complete control, located at the front. Photo: Airpurifierfirst.com / Milan Antonic

I personally love this option because I turn the air purifier on and let it set the speed automatically, based on the readings from the air quality sensor, and enjoy the fresh air.

Filter Reset Indicator

A filter reset indicator is a feature that is common to both devices. Basically, this feature lets you know when it’s time to replace the filter.

Blueair uses LED indicators located around the button as a filter reset indicator as well as a fan speed indicator.

Levoit Core 400S Vs Blueair 211+ - Top view
Top view. Photo: Airpurifierfirst.com / Milan Antonic

On the other hand, Levoit has a filter icon on the control panel that will light up red when it is time to replace the filter. In addition, you can check the current filter status at any time via the app.

Smart App

The VeSync smart app is another option that adorns the Levoit Core 400S air purifier. By connecting your device to a smart app, you open up many new options and possibilities. For example, one of my favorites is the option to program how Levoit will perform in certain situations based on pre-set scenes. 

Levoit Core 400S - PM2.5 Reading and Operating Controls
Levoit Core 400S Smart App – PM2.5 Reading and Operating Controls. Photo: Airpurifierfirst.com / Milan Antonic

The option I also like and use most often, which is available only on the app, is the auto mode sensitivity adjusting. All in all, smart apps take Levoit to the next level anyway.


Levoit and Bleuair have filters located in the bottom half. That means they both draw air in through the openings spread on all sides. 

The air is then filtered and exits on the top.


Both Levoit and Blueair come with a 2-year warranty when it comes to the warranty. But, to validate it, you should register the bought devices on the manufacturers’ websites. 

Levoit Core 400S Vs Coway AP-1512HH Coway AP-1512HH Vs Blueair 211+ Levoit Core 400S Vs Winix 5500-2 Blueair 211+ Vs Levoit Core 600S Related comparisons

Filtration Technology

It’s evident that air purifiers have become indispensable devices in every household, but the essential thing you should always keep in mind is the filtration system technology used. The Levoit Core 400S and Blueair 211+ use three-stage filtration, while the Blueair 211+ have a HEPASilent technology as an additional stage, which is essentially an ionizer.

Levoit Core 400S Vs Blueair 211+ - Filters Comparison
I pulled filters out of devices. Photo: Airpurifierfirst.com / Milan Antonic

The first filtration stage on both devices is the pre-filter, which will collect all large dust particles, hair, and the like. I especially like the pre-filter on Blueair, which is washable and available in several different colors.

The second stage of filtration on Blueair is the particle filter, while on Levoit, that is a True HEPA filter. The last stage is the fibrous filter coated with carbon on Blueair and the pellet-based carbon filter on Levoit.

Levoit Core 400S Vs Blueair 211+ - Particle filters comparison
Main filters comparison. Photo: Airpurifierfirst.com / Milan Antonic

It is commendable that both devices are CARB certified, especially if we consider that California’s laws are very strict.

Overall, I have to say that both devices use very high-quality filters, which are most responsible for the excellent results on performance tests.

How To Replace Filters?

As I already mentioned, the filter reset indicator will notify you when the time to replace the filter is.

On Blueair 211+, the filters last about 6 months, while on Levoit Core 400S, they last slightly longer, about 12 months.

The filter replacement process is extremely simple, and I have described it in detail in the individual reviews at the links below.

How to replace Levoit Core 400S filter? How to replace Blueair 211+ filter? Filter replacement

Noise Test

When it comes to noise tests, I was amazed by how quiet these air purifiers are at the lowest speeds.

Levoit Core 400S Vs Blueair 211+ - Noise test
Noise test. Photo: Airpurifierfirst.com / Milan Antonic

Levoit Core 400S produces a sound of only 42.1 dBA at the lowest speed, while Blueair 211+ produces a sound of 43.9 dBA, which is not much louder than Levoit.

Product Noise Range (dBA)
Blueair 211+ 43.9 – 59.7 dBA
Levoit Core 400S 42.1 – 59.9 dBA

What I consider a small cons with the Blueair is that the motor at maximum speed sounds a little weirder and that the sound it produces at this speed is a little louder than at the top speed of Levoit.

From my point of view, Levoit is much quieter than Blueair, and I would give it an advantage in this section for that reason and because it has more fan speeds as well.

Performance Tests

A performance test is where things get interesting, especially because I tested devices in rooms of the same dimensions.

Levoit Core 400S Vs Blueair 211+ - Performance Tests
I tested Levoit and Blueair performance with the Temtop laser particle meter. Photo: Airpurifierfirst.com / Milan Antonic

I am delighted that both have shown outstanding performance and confirmed their seriousness and reliability.

As a confirmation of my statements, please take a look at the performance tests below and see what I’m talking about.

320 sq. ft. Room Tests

In the first test, in a room of 320 sq. ft., the Blueair 211+ improved air quality by about 96% in just 60 minutes, while the Levoit Core 400S improved air quality by about 96% under the same conditions.

Air Quality Improvement In 320 sq. ft. Room
Blueair 211+
Levoit Core 400S
0% 100%

320 sq. ft. Room

* Data measuring time is 60 minutes.

These are extraordinary results, you agree? To be honest, I expected them to perform this well because of what else you could expect when having air purifiers of this quality.

560 sq. ft. Room Tests

In the second test, in a room of 560 sq. ft., which is slightly larger than the recommended dimensions, they also performed very well.

In just 60 minutes of operation, at max speed, Levoit improved air quality by about 91%, while Blueair improved air quality by about 92%.

Air Quality Improvement In 560 sq. ft. Room
Blueair 211+
Levoit Core 400S
0% 100%

560 sq. ft. Room

* Data measuring time is 60 minutes.

As in the previous test, they performed surprisingly well and confirmed why they are the best buying options.

Operating Costs

When it comes to power consumption, I must say that Levoit gets a slight advantage here, especially when we compare 38W of Levoit’s power with 61W of Bleuair’s.

Levoit Core 400S Vs Blueair 211+ - Motors comparison
Motors comparison. Photo: Airpurifierfirst.com / Milan Antonic

At top speed, Levoit consumes about 35W, while Blueair consumes about 49W. This means that if you leave them running 24 hours a day for a period of one month, your electricity bill would be increased by about $3 in the case of Levoit and by about $4.3 in the case of Blueair.

Product Wattage Range (W)
Blueair 211+ 0.2 – 49W
Levoit Core 400S 0.9 – 35W

If we add longer-lasting filters, which are also cheaper for Levoit, it is clear that the Levoit Core 400S is much more affordable to maintain annually than the Blueair 211+.

Levoit Core 400S Vs Blueair 211+ – Video Comparison

Which One Does It Better?

This was a tough battle between two top-notch air purifiers, and deciding which is a better buying option was not easy.

But, after a detailed analysis of both devices, I declare the Levoit Core 400S as my absolute buying recommendation and a slightly better option over the Blueair 211+. Such a decision was due to all the features this air purifier is equipped with, to be more precise, the air quality sensor, air quality indicator, smart app, and auto mode that are lacking on Blueair. Additionally, Levoit is a bit quieter at work and much cheaper to maintain annually.

However, if you are a fan of simplicity and minimalism, and you would instead choose the Blueair, you won’t go wrong, and due to its higher airflow, the Blueair could even be used in rooms larger than 500 sq. ft. 

If you have any questions, do not hesitate to leave a comment in the comments box below the article.

4 responses to “Levoit Core 400S Vs Blueair 211+ – Battle Of Titans!”

  1. Jessica

    Any idea how much EMFs either of these gives off, especially the Levoit since it’s smart enabled?

  2. Mierda

    Enjoyable read 🙂

Leave a Reply

Your email address will not be published. Required fields are marked *