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.
Table of Contents
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.
Specs: Blueair 211+ Vs Levoit Core 400S
| Product Image |  |  |
| Manufacturer | Blueair | Levoit |
| Model | 211+ | Core 400S |
| Dimensions (inches / cm) | 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) |
| Weight (pounds / kg) | 15 lb (7 kg) | 10.5 Ib (4.8 kg) |
| Clean Air Delivery Rate (CADR) | 350 CFM (595 m³/h) | 260 CFM (442 m³/h) |
| Coverage (4.8 ACH)
Room Coverage Explanation: ACH is a measurement used in indoor air quality management to indicate how many times the air within a defined space is changed/moved through the filter media.
For more details, visit our ACH calculator tool. | 540 sq. ft. (50 m²) | 403 sq. ft. (37 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.4 - Average Score (75 products) 9.8 - Best Score (2 products) 2.5 - Worst Score (2 products) We use the Temtop LKC-1000S laser particle meter to test the particle removal efficiency of every air purifier. It measures PM2.5 (µg/m3), PM10 (µg/m3), Particles (per/L), and HCHO (mg/m3) in the air, and also calculates the AQI. You can read more about our testing methodology here. | ||
| 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 Life | 6 months | up to 12 months |
| Power Consumption
Power Usage Summary: Our extensive testing of 75 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 61W | 38W (24W European Model) |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 9 - Average Score (75 products) 10 - Best Score (2 products) 1.7 - Worst Score (1 products) We measure the power usage at all speeds using an energy meter, after which we calculate how much it would cost to use the device at a particular fan speed for one month. For reference, we use an energy price of $0.12 per kWh. You can read more about our testing methodology here. | ||
| Number of Fan Speeds | 3 – Speed 1 (Low), Speed 2 (Medium), and Speed 3 (High) | 5 – Sleep Mode, Low Mode, Medium Mode, High Mode, and Turbo Mode |
| Air Quality Sensor Air Quality Sensor Summary: Out of 75 air purifiers tested, only 36 have the air quality sensor. | No | Yes |
| Air Quality Indicator | No | Yes |
| Auto Mode Auto Mode Summary: Out of 75 air purifiers tested, only 37 have auto mode functionality. | No | Yes |
| Smart App Smart App Summary: Out of 75 air purifiers tested, only 23 have smart app functionality. | No | Yes |
| Voice Control Voice Control Summary: Out of 75 air purifiers tested, only 22 have voice control functionality. | No | Yes |
| Other Features | Smart Plug | Display OffDisplay LockTimer |
| Noise Level (low – high) | 43.9 – 59.7 dBA | 42.1 – 59.9 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.3 - Average Score (75 products) 10 - Best Score (1 products) 8.2 - Worst Score (1 products) We use a special noise measurement tool to test the noise level of the air purifier at all speeds. We measured the noise level on the dBA scale. You can read more about our testing methodology here. | ||
| Best Suited For | Living Rooms Offices Allergies Large Spaces Dust | Living Rooms Kitchens Allergies Large Spaces Dust Smart Home Integration Air Quality Monitoring |
| 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.
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.
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.
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.
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.
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.
Airflow
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.
Warranty
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.
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.
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.
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.
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 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.
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.
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%.
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.
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.
Thank you.
Any idea how much EMFs either of these gives off, especially the Levoit since it’s smart enabled?
I’m not sure, as I don’t have an EMF meter.
Enjoyable read 🙂