One of the reasons for comparing the Medify MA-25 and Blueair 411 Auto air purifiers is their availability in both the US and EU markets. Additionally, they share several similar characteristics, such as three fan speeds, impressive performance, similar coverage, and simple controls.
These air purifiers cover almost identical room sizes. The Medify MA-25 is suitable for rooms up to 171 sq. ft. (16 m²), while the Blueair 411 Auto is intended for slightly larger rooms up to 190 sq. ft. (18 m²). In the recommended room sizes, they will clean the air 4.8 times per hour.
Regarding filtration technology, the Blueair 411 Auto has four stages if we count the HEPASilent technology, while the Medify MA-25 has only three. The most significant difference is that the Medify MA-25 features a dual filter with a True HEPA filter and a pellet-based carbon filter. In contrast, the Blueair 411 Auto lacks a True HEPA filter but includes a washable pre-filter.
The Blueair 411 Auto has an air quality sensor, air quality indicator, and auto mode features. The Medify MA-25 lacks these features but offers some standard options such as a timer, display lock, and display off.
Our Verdict
In general, this comparison was very tight, especially regarding performance and noise level. However, the Medify MA-25 is a much larger power consumer than the Blueair 411 Auto.
Additionally, the Blueair 411 Auto has an air quality sensor, air quality indicator, and auto mode features, which, along with a washable pre-filter and cheaper maintenance, make it a better option than the Medify MA-25.
If you have any questions about these two air purifiers, please leave a comment in the comment box below the article.
Specs: Medify MA-25 Vs Blueair 411 Auto
| Product Image |  |  |
| Manufacturer | Medify | Blueair |
| Model | MA-25 | 411 Auto |
| Dimensions (inches / cm) | 13.5 x 8 x 8 inches (34.3 x 20.3 x 20.3 cm) | 16.7 x 7.8 x 7.8 inches (42.5 x 20 x 20 cm) |
| Weight (pounds / kg) | 7.3 lb (3.3 kg) | - |
| Clean Air Delivery Rate (CADR) | 110 CFM (187 m³/h) | 123 CFM (210 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. | 171 sq. ft. (16 m²) | 190 sq. ft. (18 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.4 - Average Score (71 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 | Pre-filter, True HEPA Filter, and Activated Carbon Filter | Washable Pre-filter, Particle Filter, and Carbon Filter |
| Filter Replacement Indicator | Yes | Yes |
| Filter Life | 3-4 months | about 6 months |
| Power Consumption
Power Usage Summary: Our extensive testing of 71 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 28W | 10W |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 9 - Average Score (71 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, Speed 2, and Speed 3 | 3 – Night Mode, Everyday Mode, Boost Mode |
| Air Quality Sensor Air Quality Sensor Summary: Out of 71 air purifiers tested, only 33 have the air quality sensor. | No | Yes |
| Air Quality Indicator | No | Yes |
| Auto Mode Auto Mode Summary: Out of 71 air purifiers tested, only 34 have auto mode functionality. | No | Yes |
| Smart App Smart App Summary: Out of 71 air purifiers tested, only 22 have smart app functionality. | No | No |
| Voice Control Voice Control Summary: Out of 71 air purifiers tested, only 22 have voice control functionality. | No | No |
| Other Features | TimerDisplay OffDisplay Lock | Smart Plug |
| Noise Level (low – high) | 41.8 – 64.0 dBA | 41.6 – 61.2 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.3 - Average Score (71 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 | Small Spaces Dust Portable Use | Bedrooms Allergies Small Spaces Dust Low Energy Cost |
| Warranty | Lifetime (with subscription) | 2-year |
| In-Depth Review | Medify MA-25 | Blueair 411 Auto |
| Price | Check Price on Amazon | Check Price on Amazon |
Performance Test – Comparison
Before we move on to the performance tests, I would like to point out that the Medify MA-25 has a slightly lower CADR of 110 CFM (187 m³/h), while the Blueair 411 Auto has a CADR of 123 CFM (210 m³/h). This means that these two devices cover rooms of similar sizes, which is why we tested them in rooms of identical dimensions.
Particle Removal Tests - Comparison
We placed the Medify MA-25 and Blueair 411 Auto in two separate tests and measured their performance using the Temtop laser particle meter.
In the first test, in a room of 194 sq. ft. (18 m²), both devices improved air quality by about 94%, while in a room of 320 sq. ft. (30 m²), both improved air quality by about 91%. The devices operated at maximum speeds throughout the tests, which lasted 60 minutes.
Overall, these are excellent results, especially in a room larger than the recommended size, which is a confirmation of the quality of their filtration technology.
We can say that this test is a draw.
Smoke Box Test – Comparison
Besides the particle removal tests, we always test air purifiers to see how fast they remove smoke from a glass box.
We performed this same test with these two.
The Blueair 411 Auto took about 27 seconds to remove all the smoke from the glass box, while the Medify MA-25 needed 31 seconds.
Although the Medify was 4 seconds slower, both devices performed well in this test.
Noise Level Test – Comparison
The first thing I would highlight regarding noise is that both devices have three fan speeds, with the Blueair having a sleep mode.
However, even though the Medify does not have a sleep mode, both devices are equally loud at the lowest speed. The Blueair 411 Auto produces a sound level of 41.6 dBA in sleep mode, while the Medify MA-25 produces a sound level of 41.8 dBA at the first speed.
Noise Levels - Comparison
Comparison of noise levels at all fan speeds between the Medify MA-25 and Blueair 411 Auto air purifiers.
The situation is somewhat different at maximum speed, where the Medify MA-25 is slightly louder. This air purifier produces a sound level of 64 dBA, while the Blueair 411 Auto produces a sound level of 61.2 dBA at maximum speed.
| Fan Speed | Medify MA-25 (dBA) | Blueair 411 Auto (dBA) |
|---|---|---|
| Sleep Mode | - | 41.6 dBA |
| Speed 1 (Low) | 41.8 dBA | 42.9 dBA |
| Speed 2 (Medium) | 50.3 dBA | 61.2 dBA |
| Speed 3 (High) | 64 dBA | - |
Essentially, although the Blueair is quieter during work, it produces a strange noise at max speed, which is somewhat annoying. Therefore, I would say that the Medify MA-25 is slightly better optimized for noise.
Operating Costs – Comparison
When we talk about operating costs, I must say that it’s very difficult to find a smaller consumer than the Blueair 411 Auto. It has a motor with just 10W power.
On the other hand, the Medify MA-25 uses a 28W motor.
If you were to use these two devices at maximum speed, 24 hours a day, over one month, your electricity bill would increase by about $2.31 in the case of the Medify and about $0.80 in the case of the Blueair.
Monthly Power Consumption Cost - Comparison
Comparison of monthly power consumption costs for the Medify MA-25 and Blueair 411 Auto air purifiers at all fan speeds.
It’s obvious that the Blueair is the smaller energy consumer. Essentially, it will cost you about three times less than the Medify when it comes to electricity consumption at max speed.
Besides the electricity cost, there is also the cost of replacement filters.
While the Medify MA-25 is known for using slightly more expensive filters, the Blueair uses relatively cheap ones.
| Fan Speed | Medify MA-25 (W + $/month) | Blueair 411 Auto (W + $/month) |
|---|---|---|
| Standby | 0.1W ($0.01) | 0W ($0) |
| Sleep Mode | - | 1.9W ($0.17) |
| Speed 1 (Low) | 1.6W ($0.14) | 2.3W ($0.2) |
| Speed 2 (Medium) | 7.3W ($0.64) | 9.1W ($0.8) |
| Speed 3 (High) | 26.3W ($2.31) | - |
All in all, the Blueair 411 Auto is generally much more afordable to maintain annually than the Medify MA-25.
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