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Alen BreatheSmart Air Purifier Review

Alen BreatheSmart Air Purifier Review

The Alen BreatheSmart is one of the best HEPA air purifiers for large and extra-large rooms. It can cover up to 1100 square feet.

The most surprising thing is not that it covers that much space, though that’s great, but how quietly it operates despite the amount of power it puts out.

We have reviewed smaller air purifiers that make more noise than the Alen BreatheSmart.

As you would expect from an air purifier this powerful, it’s big. But that’s not a problem because it looks great.

The front is completely smooth and bare. You can select from over 10 finishes including oak, Rosewood, white, brushed bronze and others.

You can also select which HEPA filter you want in your purifier. There are filters specifically for mold & bacteria, allergies & dust, pet dander & odor and smoke & chemicals.

Essentially, you can customize your own Alen BreatheSmart in terms of appearance and function.

Read on for our full review.

If you are looking for a cheaper HEPA air purifier (yes, this one is obviously pricey), read our best HEPA air purifier reviews guide. 


  • High performance air purification.
  • Large room coverage.
  • Air quality indicator.
  • Customizable HEPA filter options.
  • Customizable design options.
  • Quiet operation.
  • Ozone-free ionizer.


  • Takes up a lot of space.
  • Expensive (but worth it).

Best Features 

Alen BreatheSmart Air Purifier Review

1. 1100 sq. ft. Coverage 

The Alen BreatheSmart has one of the highest coverage of any HEPA air purifier.

If you are looking for an air purifier that will cover a large bedroom, an open basement or an open concept living area, this is a great choice.

Note that this coverage only applies when the air purifier is at max speed. If you set a lower speed, it can still cover the same area but it will work slower.

The ideal coverage at the second speed setting is 690 square feet, which is still pretty big.

2. Customizable HEPA Filter

Alen BreatheSmart Air Purifier

You can select which filter you want depending on the kind of pollutants and allergens that bother you most.

There are four types of HEPA filters.

HEPA Pure: For dust, pollen, dander and other allergens.

HEPA Silver: For dust, mold, mildew, bacteria and light odors.

HEPA Fresh Plus: For fumes and smells from VOCs. These include bleach, air fresheners, perfumes and aerosol sprays. Also good for strong odors from wildfires, cooking and tobacco.

HEPA Odorcell: Best for strong odors from pets, litter and stinky teenager rooms.

3. Large but Stylish with Customizable Finishes

As I mentioned, the Alen BreatheSmart is larger than your typical air purifier.

Large boxy machines aren’t generally the most stylish. This one is an exception thanks to the wide range of customizable finishes.

If you want a warm traditional style, you can go with oak, Rosewood, weathered gray or brushed bronze. For a more modern style, there is white, graphite and primer.

You can even select a color that matches your room décor.

4. Quiet Operation 

The air purifier is quieter than you would expect from something of its size and power. It uses WhisperMax technology to stay quiet even when operating at a high fan speed.

Of course, it’s a bit loud at the highest Turbo fan speed. But it’s more of a relaxing white noise sound. In a large room, it’s barely noticeable.

The lower speeds are even quieter and are perfect for bedtime.

5. Auto Mode and Air Quality Indicator 

Alen BreatheSmart Air Purifier

When you select auto mode, the air purifier will automatically select the ideal fan speed based on the current air quality.

If someone starts cooking or some dust blows in, it kicks up fan speed to circulate air faster through the filter.

A light indicator tells you how dirty or clean your air is by changing color.

When you first install it, it will stay on red meaning your indoor air is dirty. After a few hours or a couple of days, it will switch to yellow (medium air quality) then blue (clean air).

 For most of the time, it will switch between yellow and blue and occasionally to red when there is a spike in air pollutants.


Alen BreatheSmart Air Purifier Review

The main downside is the price. The Alen BreatheSmart costs about double the price of mid-range air purifiers.

But it is arguably worth the price.

It’s more powerful than most other air purifiers, has more features and looks significantly better than most.

The other minor issue is the size - although I don’t think this is a problem for the size of rooms it’s mean to be used in.


Dimensions: 17.75" x 26.75" x 10"

Weight: 21 lbs

Coverage: 1100 square feet

Number of filters: 3 or 4 depending on the type of HEPA filter you select

Ionizer: yes

Filter change reminder: yes

Auto mode: yes

Fan speeds: 4

Air quality indicator: yes


Alen BreatheSmart Air Purifier Review

Expensive but worth it. That’s our bottom line on the Alen BreatheSmart air purifier.

It’s a great choice for families that are looking for a powerful but quiet air purifier that can easily cover a large room.

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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