If we’re honest, Alen BreatheSmart Fit50 is the only air purifier from the original BreatheSmart series that managed the impossible:
Bring the maximum noise levels (at Turbo Speed) down below 50 dB.
Alen BreatheSmart air purifiers are designed to be whisper quiet; perfect for bedrooms. That was the idea, anyway. The reality is that both BreatheSmart FLEX and Classic are, admittedly, very quiet but still produce 56 dB at Turbo Speed.
As we’ll see in this Alen BreatheSmart Fit50 review, the Fit50 is the only truly silent air purifier with max. noise levels of 49 dB. In this regard, it can even be compared to the ultimate best air purifiers – the new BreatheSmart 45i and, of course, the best-of-the-best Alen 75i model.
BreatheSmart Fit50 is, despite being succeeded by the 45i model, one of the best mid-sized air purifiers. In order to truly assess the performance of this model, we will go through an in-depth review of the Alen BreatheSmart Fit50 air purifier.
We’ll point out the good specs like silent operation, superb H13 HEPA filters, and decent square footage, as well as the bad like low energy-efficiency and a higher price point (especially compared to the 45i model).
You can use these navigation helpers to check anything in particular, like the filtration system, CADR rating, available Alen BreatheSmart Fit50 sales, and so on:
Alen BreatheSmart Fit50 Review At-A-Glance: One of the best mid-sized air purifiers for bedrooms. Achieved the holy grail of having below 50 dB noise levels, with 220 CADR rating, and the LED light signals that relate the air quality in real-time.
Overall rating: 
Alen BreatheSmart Fit50 Specifications
| Max. Coverage Area: | 900 sq ft (2 ACH) 360 sq ft (5 ACH) |
| CADR Rating: | 220 |
| Max. Airflow: | 110 CFM (Speed 1), 142 CFM (Speed 2), 192 CFM (Speed 3), 231 CFM (Turbo Speed) |
| Filters: | True HEPA Pure (H13) |
| Filter Lifespan: | 12 Months |
| Power: | 1.2 – 60 Watts |
| Noise Levels: | From 32 dB (Speed 1) to 49 dB (Turbo Speed) |
| Dimensions: | 22.25″ x 16.75″ x 10″ (H x W x D) |
| Weight: | 16 lbs |
| Price: | $$$$ |
| Average Rating: | |
Alen BreatheSmart Fit50 Filters
Alen is known for its prolonged life filters. BreatheSmart Fit50 uses the H13 medical-grade HEPA filter as the main filter. This is a major pro for Fit50.
Comparison: Most True HEPA air purifiers use H10-12 HEPA filters. These are calibrated to remove more than 99.97% of airborne particles that are 0.3-microns in diameter. They do a good job at removing dust, pollen, smoke, mold, certain bacteria, and so on.
Filters Alen BreatheSmart Fit50 uses are even better. Instead of H10-12, H13 HEPA filters are used. These are calibrated to remove more than 99.99% of airborne particles that are 0.1-microns in diameter. Essentially, in addition to what the H10-12 HEPA filter does, Fit50’s filter additionally removes air particulates that are up to 3 times smaller than what standard HEPA filters can filter out.
Because these Alen Fit50 filters are so thorough they are dubbed ‘medical-grade HEPA filters’ and are often used in hospitals and clinics.
Alen filters are composed of additional filtration layers. When you buy Alen Fit50, you can choose between 4 main filters. Each of them is superb; they only vary in how well they additionally remove specific pollutants. Here are the 4 Alen Fit50 filter options:
- Pure filter FF50. Basic filter that removes allergens and dust particles. Cost of replacement filter $89.
- Silver filter FF50-Silver-Carbon. An additional layer of activated carbon filtration; is considered an antimicrobial filter and removes mold and bacteria exceptionally well. Cost of replacement filter: $99.
- FreshPlus filter FF50-VOC. The “chemical filter” is designed to additionally remove volatile organic compounds (VOCs). Cost of replacement filter: $129.
- OdorCell filter FF50-MP. The best Fit50 filter for removing odors and undesired smells. Removes everything from cigarette smell to diaper odor. Cost of replacement filter: $139.
The most popular choice for the Alen BreatheSmart Fit50 is the Silver filter due to its affordable cost. The OdorCell filter, however, is considered the best at increasing indoor air quality.
Alen BreatheSmart Fit50 CADR Rating And Maximum Airflow
The CADR rating is the measure of air purifier efficiency at removing airborne pollutants. Basically, it’s the most important metric based on which we can differentiate between air purifiers based on performance.
Alen BreatheSmart Fit50’s CADR rating is 220. CADR is a 0-450 scale; Fit50 is somewhere in the middle. Not the best, not the worst, just right for standard-sized rooms. Of course, it can’t compare to the Alen BreatheSmart 75i’s 400 CADR rating.
Another important aspect is how much airflow must Alen BreatheSmart Fit50 generate to achieve the 220 CADR rating. In this case, Fit50 generates 231 CFM at Turbo Speed. That’s usually isn’t optimal; when CFM is higher than CADR, that means a lot of airflow, and a lot of airflow equates to higher noise levels.
Not in this case, as we’ll see in the noise profile.
Based on the CADR rating, the recommended coverage area of BreatheSmart Fit50 can be calculated:
Alen BreatheSmart Fit50 Square Footage (Recommended Room Size)
Alen Fit50 is a mid-sized air purifier. You can put in a 900 sq ft space and it will filter out air pollutants every 300 minutes (based on the CFM calculation). That means it will achieve 2 air changes per hour in 900 sq ft rooms.
To produce an even better indoor air quality, you should shot closer to 5 air changes per hour (5 ACH). That means that Alen BreatheSmart Fit50 should clean all the air in the room every 12 minutes.
Room size for 5 ACH? 360 sq ft. This is square footage most standard-sized bedrooms have, for example. Here is how Alen BreatheSmart looks in the bedroom:
Of course, these recommended square footage calculations are valid for the top fan speed setting. You can obviously put the Alen Fit50 in a smaller room (but not larger).
Keep in mind that Alen BreatheSmart Fit50 has 4 speed settings, and each of them generates a different airflow:
- Speed 1 = 110 CFM.
- Speed 2 = 142 CFM.
- Speed 3 = 192 CFM.
- Turbo Speed = 231 CFM.
Adjust the speed according to the quality of air. If you have poor air quality, run the Fit50 on Turbo Speed. At excellent air quality, you can slow it down to Speed 1. The indicator on the air purifier will tell you, via a sensor, how dirty or clean your indoor air is.
Let’s look at some electric consumption numbers:
Alen BreatheSmart Fit50 Power Consumption (Wattage)
Air purifiers don’t use a lot of electricity. The power consumption of Alen BreatheSmart Fit50 is a bit over average, however. This is one smaller con for the Fit50.
Does the power consumption matter? A little, yes. You can save a few $10 per year with energy-efficient air purifiers.
Fit50’s wattage is 1.2W for Speed 1 and 60W for Turbo Speed. Let’s do a bit of calculating to see how much it costs to run Alen Fit50 all day at the Turbo Speed:
60 Watts * 24 hours = 1.44 kWh
If you consider that 1 kWh of electricity costs about $0.13 (depends on the state, obviously), running the Fit50 at full speed will spend $0.20 worth of electricity per day. That’s a good dollar per week. Well, nothing truly to worry about, right?
Alen BreatheSmart Fit50 Noise Levels
As we have stated previously, BreatheSmart series air purifiers should be as silent as a whisper. FLEX and Classic models are silent but not as silent as they should be. Fit50 is the only one from the original BreatheSmart series that has a super quiet operation; the new flagship 45i and 75i models also have the same super-quiet operation.
Alen BreatheSmart Fit50 will generate only 32 dB at Speed 1. That’s almost too silent to be heard. The truly important specification is the noise level at the highest fan speed setting.
Fit50 excels at that. Even at Turbo Speed, it will generate only 49 dB of noise. That’s considered a super silent air purifier and is a major pro in the Alen BreatheSmarth Fit50 review.
Alen BreatheSmart FLEX Special Features
Fit50 is one of the first Alen air purifiers to be fitted with an air quality sensor. People often wonder if air purifiers work or not. The sensor measures the air quality in real-time.
You can literally check it go from dirty air to neutral air to clean air via the LED light signals on the Alen Fit50 control panel. That’s how you don’t have to wonder if the air purifier works correctly; you can just check the LED light and see your indoor air improving.
Aesthetics-wise, there is a range of different colors Fit50 comes in:
Color choices that are available for Alen Fit50: White, Graphite, Brushed Stainless, Espresso, Weathered Gray, Oak.
This is not a special feature, but it’s quite a useful thing altogether:
Alen offers a lifetime quality for all their air purifiers. That means that Alen BreatheSmart Fit50 is guaranteed pretty much forever. They have a very helpful support center and will help you out if anything goes wrong with Fit50.
Alen BreatheSmart Fit50 Price
All Alen air purifiers have a premium price for a very good reason. Alen BreatheSmart Fit50, for example, is made out of high-quality materials, it’s reliable, and have superb specification as we have discussed in this Alen BreatheSmart Fit50 review.
Better products generally do cost more, right?
The higher price of the Fit50 unit itself is offset by the use of prolonged life HEPA filters. If you check the section about Fit50 filters, you see that these filters have to be replaced only after 12 or so months. Most HEPA filters and, in addition, activated carbon filters need to be replaced 3-5 times per year. That incurs some serious costs.
Here’s the total cost of the basic Alen BreatheSmart Fit50: $579.
This higher cost of the device (short-term cost) is balanced out by lower long-terms costs due to high-quality filters with a 2-4x longer lifespan compared to HEPA filters found in other air purifiers.
Alen BreatheSmart Fit50 Sale
The standard price of the Alen BreatheSmart Fit50 is $579. The price is reasonable for a high-quality medium-sized air purifier with such renown as Alen.
We keep up with all Alen BreatheSmart Fit50 sales. You can check the current sale here:
Check Alen BreatheSmart Fit50 Sale, Free Shipping, Subscription Savings
Final Verdict On Alen BreatheSmart Fit50
Alen BreatheSmart Fit50 is the only 1 of 3 original series BreatheSmart air purifiers that achieved the ultimate goal:
Create an air purifier that is super quiet even at the highest speed settings. With the below 50 dB noise level profile, Alen Fit50 is a perfect air purifier for medium-sized bedrooms (360 sq ft is perfect coverage).
Overall Alen BreatheSmart Fit50 rating: