Alen BreatheSmart 45i HEPA Air Purifier Review

Air purifiers are incredibly useful devices. More often than not, our air is full of nasty germs and contaminants that, when we inhale them, affect our bodies in less than positive ways especially if we’re inhaling them over a longer period, such as throughout the day.

But, with a good air purifier, the air is sucked in, and then all of the nasty germs and contaminants are removed from the air, and then the air is sent back out, allowing you to inhale it without having to worry about any potential side effects, and other nastiness.

Over the years, air purifiers have become increasingly more advanced and elaborate.

The technology has grown and transformed a lot, and now, air purifiers are exceptionally advanced and useful machines that have developed a variety of processes that enable them to thoroughly and effectively cleanse your air of whatever impurities are in your air.

Today, one of the most advanced and useful air purifiers is the Alen BreatheSmart 45i Air Purifier. Now, as air purifier manufacturers go, Alen is easily one of the greatest manufacturers. They have developed many amazing air purifiers.

Air purifiers that are, from a design and aesthetic standpoint, absolutely beautiful, while also coming with all of the features that enable you to clean your air in a truly efficient and easy manner.

We’re going to be taking an in-depth look at the Alen BreatheSmart 45i Air Purifier today. You’re going to learn all about the unique features and attributes that comprise this excellent air purifier.


Let’s start off with the design. Alen has opted for a sleek and minimalist design. You can choose from fourteen different designer panels, and these designer panels are all primary colors that are designed to go with just about anything. As for the shape, it is a rectangular shape, and everything is stored within a nice, sleek rectangular frame.

In comparison to other air purifiers, the Alen BreatheSmart 45i is quite light, since it only weighs around 20 pounds. Picking it up and moving it around is easy, as a result of this.

With the design, you can place the Alen BreatheSmart 45i just about anywhere, and it will blend in with that space, and it might even make that space look extra nice, as well. Most air purifiers don’t have this level of aesthetic quality, which makes this air purifier rather unique.

To aid in the overall design quality, everything is very clearly labeled and delineated. You won’t ever be confused or uncertain about what the buttons do, or how to activate certain features. Instead, clarity is one of the main design themes that runs throughout this air purifier.

Alen has designed this air purifier to be used in smaller spaces, as well as larger spaces, as long as they aren’t too big. More specifically, the Maximum Area Coverage – or “MAC”, for short – is 800 square feet.

This is a pretty decent size, for an air purifier. You can use this unit in most apartments – especially studio apartments – and you shouldn’t have any issues using it in living rooms, basements, attics, and, of course, bedrooms.

Alen BreatheSmart 45i HEPA Air Purifier

If you intend to use the device in your bedroom, while sleeping, you don’t need to worry about the air purifier being too loud or noisy. The Alen BreatheSmart 45i Air Purifier uses a technology known as “WhisperMax”.

WhisperMax is a technology that reduces the sound of the filtration systems, as they work so that less sound is produced. That way, you will be able to sleep, without hearing a constant throbbing or pulsing sound, which is the sound that many air purifiers produce.

Ultimately, the WhisperMax feature is designed for convenience and ease-of-use. Making it more convenient to use while sleeping, and making it easier to use the air purifier, in general. Another feature that has been designed to aid in the overall convenience and ease-of-use is that of the laser-technology that is used for the sensors.

Using something known as a “Laser Smart Sensor”, lasers are used to sense the smallest and most minuscule particles that are in your air, at any given time. These laser sensors can detect particles that are as small as 0.3 microns – which is 300-times as small as a single strand of hair – and then this information is fed back into the air purifier.

Using this information, the air purifier can determine the quality of your air, and then it adjusts the speed of the air purifier, and the overall filtration process, to best accommodate your air quality.

You can access this information, regarding the quality of your air, at any time, by looking at the small LED color display, that is on the air purifier.

The filtration system is that of a HEPA-PURE system, which involves numerous HEPA layers, that are designed to break up the small particles – such as allergens and dust particles – that are in your air.

Initially, the first filter that is used is that of a Pre-Filter, which breaks up all of the bigger particles, and separates them from each other, making it easier for everything to then flow into the main HEPA-Filter layers, where all of the other particles are broken up and separated. After that, the air is released, and it is now healthy and clean, making it safe for you to breathe.

Related Alen Air Purifier Articles

Single Reviews
Alen BreatheSmart 45i HEPA Air Purifier
Alen FIT50 Customizable Air Purifier
Alen FLEX Customizable Air Purifier
Alen BreatheSmart Customizable Air Purifier

Comparison Articles
Alen BreatheSmart vs Rabbit Air MinusA2


If you want an absolutely amazing air purifier that is exceptionally good at cleansing your air of the germs, contaminants, allergens, and general impurities that are in it, then you really cannot go wrong with the Alen BreatheSmart 45i Air Purifier. This is easily one of the best air purifiers on the market.

In terms of design, it’s absolutely amazing, and you won’t have a problem using the device, figuring out how to use it, and you won’t have issues with its aesthetic or appearance. And, when it comes to power and functionality, it provides performance that is truly second-to-none.

However, it is expensive, but as investments go, this is one of the best air purifiers you can buy.

Alen BreatheSmart 45i HEPA Air Purifier with Pure Filter for Allergies and Dust in White

3 Recommended Air Purifiers
Best of the
Multiple Functions Budget Pick
(< $100)
Alen BreatheSmart Classic Large Room Air Purifier - HEPA Filter for Allergies & Dust - 1100 sqft - Graphite Dyson Pure Hot + Cool Link HP02 Wi-Fi Enabled Air Purifier,White/Silver LEVOIT Air Purifier for Home Smokers Allergies and Pets Hair, True HEPA Filter, Quiet in Bedroom, Filtration System Cleaner Eliminators, Odor Smoke Dust Mold, Night Light, 2-Year Warranty, LV-H132
Alen Dyson Levoit
Classic HP02 LV-H132
1100 SqFt 300 SqFt 130 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
21 pounds 8.62 pounds 6.5 pounds

Related Air Purifier Articles

Buying Guides
Best Air Purifiers in 2020
Best HEPA Air Purifiers
Best Air Purifier for Allergies
Best Air Purifiers for Mold
Best Air Purifiers for Smoke
Best Air Purifier for Bacteria
Best Charcoal Air Purifiers
Best Air Purifiers for Dust

The Best of HouseholdMe in Your Inbox!

We’d love to stay in touch, sign up for the HouseholdMe team to contact you with great news, content and offers.

* indicates required