In this article, we’re taking a look at three air purifiers. All three of these air purifiers come straight from Alen, and Alen is one of the best air purifier manufacturers on the market, today.

You’re going to learn all about the BreatheSmart FLEX, the BreatheSmart FIT50, and the BreatheSmart 75i air purifier.

BreatheSmart 75i vs. FLEX vs. FIT50

Each one of these comes equipped with its own unique features and attributes. By the end of this quick article, you’re going to know which one of these three is the best air purifier for you.

Now, let’s begin!


The Alen BreatheSmart FLEX

Right off the bat, you’re going to notice that the Alen BreatheSmart FLEX has a simple design that is quite pretty. It’s minimalist, and it comes in fourteen different color patterns. Because of this, you can put it anywhere you want, and it will match whatever decor or interior design you have.

BreatheSmart FLEX vs. FIT50 vs. 75i

It only weighs 15 pounds, as well, and there is a small handle on the top of the air purifier. This makes it easy to pick it up and move it around, to different parts of your home.

Using the Alen BreatheSmart FLEX, you can purify a room that is up to 700 square feet. For most air purifiers, this is quite good, and because of it, you can easily purify your living room, or even your entire apartment, if you live in a studio.

The actual air purification process is efficient because the entirety of that 700 square feet space is cleaned every 30 minutes. And this is done using a HEPA-Silver filter.

Now, this HEPA-Silver filter consists of four individual stages. The first is that of a Pre-Filter that captures larger particles and debris, such as pet hair. Then, the second stage is the Silver Filter, which captures and then eradicates things like mold, fungus, and other nasty substances.

The third filtration stage consists of a HEPA-Pure filter which filters out all of the allergens. Finally, the fourth filtration stage is a Carbon Filter, which gets rid of any nasty stenches or odors that may be lurking around in your space.

While all of this is going on, the air purifier is quiet. That’s because it uses WhisperMax technology. Even on the highest fan speed – there are four to choose from, based on your specific air purification needs – it is still quiet, and you can sleep with the air purifier on.

BreatheSmart FLEX Air Purifier

The Alen BreatheSmart FIT50

In many ways, the Alen BreatheSmart FIT50 is very similar to the Alen BreatheSmart FLEX. However, the biggest difference is that you can now purify a space that is up 900 square feet, rather than just 700 square feet.

Just as with the FLEX, this purification process takes 3p minutes, and in that time, the entire space is thoroughly purified.

BreatheSmart FIT50 vs. 75i vs. FLEX

Other than that, the only difference is the laser sensors that are used. Using advanced laser sensors, the Alen BreatheSmart FIT50 can sense the particles in your room, and then, using that information, it will adjust itself to accommodate the needs of your air, based on the particles it is sensing.

This means you don’t even need to actually set anything when you run your purifier. As features go, this is certainly the peak of convenience.

BreatheSmart FIT50 Air Purifier

The Alen BreatheSmart 75i

Finally, we come to the Alen BreatheSmart 75i. This is the most powerful air purifier on this list, as the title and placement may indicate, and using this air purifier, you can purify a space that is up to 1300 square feet. Once again, you can purify this entire space within a span of 30 minutes.

Other than that, though, there really aren’t any other notable features that differentiate the Alen BreatheSmart 75i from the previous two air purifiers.

However, one thing that hasn’t been mentioned yet is that all of these purifiers come with the “Alen Forever Guarantee”. This is a lifetime warranty that you will be able to use the air purifier forever. If something happens to your air purifier, you can send it back, and they will fix it or replace it for you, no extra cost.

BreatheSmart 75i

Conclusion – So, Which One Is The Best:

Ultimately, at the end of the day, these are all great air purifiers. But, one thing that needs to be mentioned is that the Alen BreatheSmart FLEX doesn’t have any laser sensor technology, so you aren’t able to automate the air purification process that much.

BreatheSmart 75i Air Purifier

If you don’t mind, and you have a smaller space, the Alen BreatheSmart FLEX is great. If you want that automation feature, and you have a larger space, then the Alen BreatheSmart FIT50 or the Alen BreatheSmart 75i are great choices.


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Alen Dyson Levoit AirTamer Coway
Classic HP02 LV-H132 A310 AP-1512HH
1100 SqFt 300 SqFt 130 SqFt - 360 SqFt
10 x 17.8 x 26.8 in 8.7 x 6 x 24.9 in 8.5 x 8.5 x 14.5 in 3.5 x 0.8 x 1.8 in 9.6 x 16.8 x 18.3 in
21 pounds 8.62 pounds 6.5 pounds 1.76 ounces 12.79 pounds