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alen breathesmart fit50

Alen BreatheSmart FIT50 HEPA Air Purifier Review

The Alen BreatheSmart FIT50 is designed to tackle different types of air pollutants, including pollen, mold spores, pet dander, dust, smoke, and odors.

Unlike most air purifiers, the Alen BreatheSmart FIT50 has a specific filter for each group of allergens.

If your biggest problem is dust, pollen, and other allergens, get the BreatheSmart FIT50 with a HEPA PURE filter (labeled on Amazon as Allergies/Dust).

If you are struggling with mold and mildew in your home, get the HEPA SILVER (mold/Bacteria). For wildfire smoke, we recommend HEPA FRESH PLUS (smoke/chemical) and for odors get the HEPA ODORCELL (pet dander/odor).

Read on to learn more about the Alen BreatheSmart FIT50.

If the BreatheSmart FIT50 is not what you were looking for, see our top HEPA air purifier reviews for other recommendations, including some cheaper options.


  • High filtration performance.
  • Removes a wide range of pollutants and allergens.
  • Air quality detector and indicator.
  • Versatile designer panels to fit your home décor.
  • Ideal for large rooms.


  • Pricey.
  • The unit is quite big – it takes up a lot of space on the floor.
  • No remote control.

Best Features 

fit50 features

1. Multistage Filtration

Like most air purifiers, the Alen BreatheSmart FIT50 uses a multistage filtration process to remove allergens and pollutants from indoor air.

The specific stages in the air purifier depend on which model you choose.

If you choose HEPA Silver for mold and bacteria, you’ll get a 4-stage air purifier: a pre-filter for the larger particles like pollen, a HEPA Silver filter for mold and bacteria, a HEPA Pure filter for fine allergens like dust and pet dander and a carbon filter for smells and gasses.

Alen BreatheSmart HEPA silver

The HEPA FRESH PLUS designed specifically for wildfire smoke and VOCs has three layers: a pre-filter, a HEPA Pure filter, and an activated carbon filter.

The HEPA ODORCELL also has three filters: a pre-filter, a HEPA Pure filter, and a third layer consisting of Molecular Conversion Powder that traps and destroys gasses.

2. Ideal for Large Rooms 

If you are looking for a HEPA air purifier powerful enough for your open-style living room or large bedroom, Alen BreatheSmart FIT50 is a great choice. It’s also ideal for large basements and home cinemas or game rooms.

It efficiently covers rooms of up to 900 square feet in size. For such a large room, it purifies all the air every 30 minutes.

For smaller rooms, the number of air changes per hour will be higher.

3. Air Quality Sensor

Using a built-in infrared sensor, the Alen BreatheSmart FIT50 continuously detects the air quality inside your home.

This is important for the auto mode (explained below). It also lets you know how dirty (or clean) your indoor air is.

A light ring around the power button lights up in a specific color to indicate air quality.

Blue indicates minimal levels of pollutants. Yellow shows a moderate quantity of allergens and pollutants, be it the cooking smell from the kitchen or some dust in the air.

If it turns red, the room is pretty bad. If you’ve not selected auto mode, turn the fan to the highest speed setting to lower pollutant levels.

4. Four Fan Speeds Plus Auto Mode

You can vary the power of the FIT50 air purifier by changing fan speed. Higher fan speed allows the air purifier to suck in more air, thus clean the room faster.

A lower fan speed reduces cleaning power and is ideal if the air in the room is already good.

But instead of constantly changing fan speed, auto mode on the air, purifier offers a much more convenient option.

Once you turn on the auto setting, the air purifier will automatically adjust fan speed based on current air quality. The auto mode is really good. You can even hear it working.

If someone starts smoking nearby or there’s some dust in the air, you’ll hear fan speed increase almost instantly.

Note that you can also lower the amount of noise from the air purifier by reducing fan speed. This is helpful when you go to sleep.

But if a white noise-kind of sound doesn’t bother you, you can leave it on a high setting. It is not that noisy.

5. Ozone-Safe Ionizer

Most air purifiers have a built-in ionizer, which helps purify and freshen indoor air. But there’s a debate about the safety of ionizers since many produce a small amount of ozone.

However, the manufacturer of the Alen BreatheSmart FIT50 says their ionizer is ozone-safe. But if you are still unsure about it, you can leave it off.

6. Timer 

You can set the air purifier to run for a specific period, after which it will turn off automatically. Options available on the control panel are 2, 4, and 12 hours.

7. Versatile Panel Designs 

Too often, you have to put up with an unappealing box on your living room floor just to enjoy cleaner air.

But not with the Alen BreatheSmart FIT50. You can choose from various panel designs to make sure the air purifier matches your décor. Our favorite are the Oak, Rosewood and Maple finished panels.


alen fit50

Though there are pricier air purifiers in the market, the Alen BreatheSmart FIT50 is more expensive than many HEPA air purifiers.

Is it worth it? We think it is, and most customers agree.

But for that money, the manufacturer could have at least included a remote control. As it is, you have to walk to the air purifier to change a setting.


Dimensions: 16.75" x 22.25" x 10"

Weight: 16lbs

Coverage: 900 square feet (at the highest fan speed)

Number of filters: Variable (depends on the model selected)

Ionizer: yes

Filter life indicator: yes

Auto mode: yes

Fan speeds: 4

Air quality indicator: yes


alen fit50 features

Surprising lack of a remote control aside, the Alen BreatheSmart FIT50 is one of the best HEPA air purifiers around.

What we love most about it is its versatility, both in terms of functionality (you can choose a specific filter that addresses your concerns) and style (multiple panel finishes).

About the Author Tom Hanson

I’ve worked as an HVAC tech in Phoenix, AZ for the past 10 years. I created to help home owners select the right portable air conditioner, cooler or air purifier for their needs & budget in just a few minutes.

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