June 7, 2021

Alen BreatheSmart 45i ReviewOver recent years, there has been a surge of air purifier users. Many people have realized how important it is for the safety of health. So, what does an air purifier or an air cleaner do? It helps get rid of toxins, airborne bacteria, dust, viruses, pollens, and allergies. Today, there are great air purifiers from different brands. And, one such brand that offers a high-quality air purifier is Alen. So, let’s do an Alen Breathesmart 45i review since it’s one of Alen’s best-selling products under the Alen Breathesmart series.

Alen Corporation came into establishment in the year 2005. They aimed to create quality air purifiers through in-depth research. Alen Breathesmart air purifiers have the most advanced True HEPA air filter, offering brilliant performance. This air purifier cleans an area of 800sq. Ft. every thirty minutes. It has a mellow sound tuned to pink noise (it is quieter and better than white noise) that enhances sound sleep.

For a product like this air purifier, an in-depth review is vital to understand the working process. So, without further ado, let’s get into the review. But before we proceed further, here are some good and bad aspects of the Alen Breathesmart 45i.

The Good
  • True HEPA (H13) with medical-grade filtration
  • Certification from ENERGY STAR
  • Perfect for large and medium-sized rooms
  • Particle sensor technology that detects the state of air quality
  • Only HEPA air purifier to get approved by SleepScore Labs that improve sleep.
  • Low sound tuned to pink noise
  • Lifetime warranty
  • Available in different shades
  • Less power consumption
  • Sleek design
  • Affordable price
The Bad
  • High-cost air filter
  • Low CADR rating

Alen Breathesmart 45i Review

When it comes to an air purifier, you’d see mixed opinions among the masses. Well, some say it works, while another section says it doesn’t! But what I can attest to is that my doubtful views on air purifiers have changed. Some months ago, I got myself an Alen Breathesmart 45i air purifier to see all the hype and myths. Released under the Alen Breathesmart series, this product has debunked all the myths surrounding air purifiers.

Let’s delve further to learn more about this air purifier and why we should have it for quality living.


Appearance matters! Well, let’s be honest here. We all look at designs that will vibe with the room. What attracted me to this Alen Breathesmart purifier was its sleek design with a minimalist touch. It stands at 25-inch height and weighs around 15lbs. Also, one of the fantastic things about this product is occupying less space. It is adaptable to small, medium, and large areas.

Alen BreatheSmart 45i Review

What I like about this air purifier is the option to choose colors. They offer seven neutral shades: graphite, brushed stainless steel, espresso, oak, and white. You can select a color of your choice to give an aesthetic look to your indoor décor.

I commend Alen for their well-built products. The front panel is plain, while on the top, there is an LED indicator and controls. I loved the touch-screen button with a sensor. Also, the LED Color display enables me to see the air quality of the air at a glance. Because of its advanced sensor, it can detect the air quality and display it through the colors. Here is how it works:

  • Orange: It means the air quality is okay with moderate pollutants.
  • Blue: It means the air quality is excellent and zero presence of pollutants.
  • Red: It means the air quality is dirty and the presence of high pollutants.
  • Green: It means the air quality is excellent and minimal presence of pollutants.

There is also an auto-mode. When I activate it, it adjusts the air cleaning range to enhance the air quality.


An air purifier is all about filtration. One of the critical aspects to consider before buying an air purifier is that it should have a True HEPA filter. It is the highest form for physical filtration of air. HEPA stands for High-Efficiency Particulate Air.

Why HEPA filter? Unlike other air filters, the HEPA filter is fiberglass with tiny holes that can trap a PM2.5 pollutant. A True HEPA filter captures 99.99% of harmful particles down to 0.1 microns.

Here is a fun fact: the PM 2.5 pollutant is thirty times smaller than your hair!

Alen Breathesmart purifier uses a True HEPA filter that takes care of allergens, dust, bacterial, mold, fungi, and odor. It uses a pre-filter to trap significant object pollutants like large dust or dog hair. The product also has an in-built ionizer, but it doesn’t produce any ozone.

Alen Breathesmart 45i has four types of air filters that cater to a different health issue:

  1. HEPA Fresh

This filter is an upgraded version of the HEPA pure air filter. It has an activated carbon filter that will help to get rid of household odors. This filter will remove light smoke and smells from cooking. It is of great help for people who are allergic to fine particles.

  1. HEPA pure

It is the standard air filter of the Alen Breathesmart air purifier. This filter helps to get rid of pollutants and dust particles. It helps to get rid of mites and pollens.

  1. HEPA silver

HEPA silver filter features an antimicrobial silver ion thread. If you have money to spare, this filter would be a good choice as it helps to destroy mold and bacteria. It also avoids the growth of spores and mold.

  1. HEPA -Odor cell

It is Alen Breathesmart45i’s ultimate HEPA filter. It is made from rare molecular powder. This air filter helps to remove odors.

Note that each of the air filters comes with a lifetime warranty offered by Alen. If there is any problem, then they will fix it or provide a new filter. However, one downside would be the cost of replacement filters. It is pretty pricey as compared to others air filters.

The filter life for this product is twelve months, and it needs to change the air filter according to the usage frequency. But if you want your air purifier to have more extended longevity, then it would be best to change filters timely.


I like the room coverage of Alen Breathesmart 45i. The excellent aspect of this air purifier is the ability to cover both small and large rooms. It is perfect for a room size of 800 sq ft. It covers 250 sq ft at low speed. The Air Changes per Hour (ACH) is 2X to 5X. I noticed that this air purifier cleans the room five times per hour.

Also, the CADR (Clean Air Delivery Rate) of this air purifier is 230 Pollen- 208 Dust-194 Smoke. Despite a low CADR rating, it can cover larger rooms as the brand had completed airflow management for this product.

Furthermore, out of curiosity, I checked the reason for the low CADR ratings of Alen air purifiers. So, from what I understood, Alen believes that higher filtration efficiency is more vital than a higher airflow rate. You can visit their website to know more about it. Leaving aside the differences, as a customer, I don’t have any issue.


One of the best aspects of this air purifier is its extremely low noise. I bet most of Alen’s customers will commend their soothing sound. It has a pink noise frequency developed through Whisper Max technology. Unlike other air purifiers, it is quiet.

Here is what you should know about pink noise and white noise: pink noise has low-frequency sounds like it gives a soothing sound. In contrast, white noise sounds sharp or hissy. The pink noise provides calmness and peace that enables you to have a sound sleep. It gives the whole home a clean and pleasant aura. Often, I forget that I have an air purifier because of its extremely low noise.

Note that Air Breathesmart 45i is the only HEPA air purifier approved by the SleepScore Labs for sleep improvement. SleepScore Lab is the world’s most advanced laboratory that runs a sleep tracking system. Good sleep is essential for a peaceful state of mind. And this air purifier helps in doing that.

Power consumption

I must say that one of the selling points of Alen Breathesmart 45i is its lower power consumption. It has already earned ENERGY STAR certification for its efficient use of energy which is a significant achievement. The power consumption in this air purifier is 38 W. It is pretty impressive because an air cleaner needs to run a long time for efficiency.


For a product that offers high quality and an impeccable design, the Alen Breathesmart 45i price is reasonable. When I first looked at the product, I thought it would be costly. It looks classy despite the minimal design. The cost of this model starts at $429 for the white color.

You will get the white color at a cheaper rate as compared to other colors. If you have money to spare, then you can choose the color of your choice. Also, you can wait for sale season if you don’t want to spend money now. You might get a good discount.

Also, all the products from Alen have a lifetime warranty. So, if anything happens to your air purifier, then they will fix it without any charge. Currently, they are offering a 10% discount on the product if you refer their products to your friends or family. You can also timely check for a promo code or coupon on their official website to redeem their products at a lower price.


For every product from Alen, you will get a user manual. You don’t have to worry about setting up the air purifier. The twelve-page manual will guide you on what to do. It covers almost everything that you will find very simple to follow. From setting up the air purifier and filter replacement, they got it all covered. Even for troubleshooting issues, they have provided guidelines. So, it would be best to keep the manual safe for reference when there is a problem.

How to use

After unboxing the package, you can easily set up this unit. Carefully lift the air purifier. There is a handle at the back so that you can grab it. The next thing you need to is open the front panel. You just need to pull the panel. It has a magnetic touch that makes it easy to open and change the filter—this is one reason I like this product. So, open the front panel and take out the air filter to remove the plastic cover. The whole process is simple and hassle-free.

Now, place the air purifier that is convenient for you. It would be best to put it near a power outlet. After plugging in, switch on and press the auto. And that’s it. No hassle! Also, the manual has everything covered. So, you don’t have to worry about it.


The maintenance of this air purifier is quite simple. However, there are certain things to keep in mind. While cleaning the front and top panel, it is advisable to use a soft cloth to avoid scratches. Also, be careful not to spill water into the unit.

You can also vacuum the pre-filter, that is, the black mesh filter in front of the filter, to have a proper efficiency of the unit. The pre-filter helps to get rid of large dust and hair. So, timely vacuuming is essential. Also, the filters are not washable and cannot reuse. Therefore, it is advisable to replace filters timely to prolong the life of your air purifier.

Frequently Asked Questions (FAQ)

If I have a problem not listed on the manual, what should I do?

In a situation like this, you can visit their official website, www.alen.com. Also, you can call 1-800-630-2396 during working hours. They will respond to your queries.

How do I find the electrical specification for my unit?

You can check the rating label that you can find at the back of the unit. All the information starting from the unit’s voltage, amps, outlet requirements, and hertz will be there.

When should I replace the air filter?

You will see three lights above the filter button. It is called a Filter life indicator. The green light illuminates most of the time. It shows the life of the filter. When the yellow light appears, it’s a sign to replace the filter. Perhaps, it would best to order a new filter. The red light illuminates when you have to replace and put a new filter.

What does an ionizer do? Will it emit ozone?

An ionizer will enable your unit’s ability to clean airborne particles. Also, it does not emit ozone. It has been tested in a 30 m3 chamber, where the ozone result for this product shows 0.001.

Alen Breathesmart 45i vs. Alen Breathesmart 75i Air purifier

Alen Breathesmart 45i vs. Alen Breathesmart 75i

Alan brand offers various types of air purifiers with different features and specifications. The brand has series of products that have won many accolades. Forbes, Consumer reports, GQ, Digital trends, Gadget review, and Home Air Guides have listed Alen’s products in their list of best air purifiers.

Alen Breathesmart 45i is an excellent air purifier. However, if you want to delve further into the Alen Breathesmart series, you can check out the Alen Breathesmart 75i air purifier. Both the air purifiers are the best-selling products of Alen. Alen Breathesmart 75i falls into the high price category range, making Alen join the high-end air purifiers.



one thing about Alen’s air purifiers is that they use only HEPA filters. Both air purifiers use a True HEPA filter. The brand believes in offering high-quality service and durability. However, there is a minor difference here. While Alen Beathesmart 45i has a pre-filter system, Alen Breathesmart 75i has three stages for cleaning the air.

Apart from that, the overall filtration process is similar. If you want a bigger air purifier, then you can go for Alen Breathesmart 75i. Also, note that all products from Alen have a lifetime warranty.

Power consumption

Both the models of Alen Breathesmart purifiers have ENERGY STAR certification. Their power consumption is low. Alan Breathesmart 75i consumes 45W, while the other Alan Breathesmart purifier consumes 38W. Here, the difference in consumption power is due to the difference in size and coverage. Out of the two, Alen Breathesmart 75i is much bigger and covers more space. You can choose any of the air purifiers as both are energy efficient.



Alen Breathesmart air purifiers have extremely low noise. Both the air purifiers generate a soothing pink noise. However, Alen Breathesamrt 75i is very quiet. When the noise level is at the lowest setting, it is only 25 decibels- it’s like quiet in a rural area during the night.

The noise level is only 49 decibels when it is at the highest settings. For the other unit, the noise level is 39 decibels, even at the lowest settings. So, when it comes to sound, Alen Breathesmart 75i looks more favorable.


Cost plays a huge factor in determining the purchasing power of a product. When I compared the prices of these two air purifiers, Alen Breathesmart 45i is way cheaper. Alen Breathesmart 75i falls under the high budget category. It starts at $749 for a basic white color. With this model, Alen has joined the high range market.


Alen Breathesamrt 75i has the most extensive room coverage from the Alen. It can cover 1300Sq ft. Even at low speed, it can clean 350 Sq ft without any problem. This air purifier cleans only twice an hour. But if you have a smaller room, you can expect new clean air after every twelve minutes.

The other unit of Alen Breathesmart purifier covers an area of 800 Sq ft. At low speed, it covers 250 Sq ft. It can clean the room five times per hour. So, when it comes to coverage, there is a massive difference between these two products. If you have a large spacious house, then you can opt for Alen Breathesmart 75i.

Design and size

The Alen Breathesmart air purifiers have a similar design and look, but their size is different. Alen Breathesmart 45i is smaller in size that is perfect for a medium-sized room. Alen Breathesmart 75i stands at 27 inches high. Also, you get a variant of fourteen color choices. So, if you want a bigger size air purifier, then you can choose Alen Breathesmart 75i.

In conclusion, both air purifiers cater to different sections of people. If you are looking for a high-end device, then Alen Breathesmart 75i would be the right choice. And, if you are on a budget, then you can opt for the other unit. Both the air purifiers have more or less similar functions. They are both high-quality air purifiers that offer various health benefits. Because of the size and capacity, there is a bit of difference in efficiency and process.

What I like about the Alen brand is its ability to produce products that cater to all the masses. They keep evolving and bring something new to the table. Both the models of Alen Breathesmart are fantastic air purifiers that allow high quality of living.

The Verdict

Alen Breathesmart 45i is an excellent air purifier, and there is so much benefit to it. This air purifier has a reasonable price with good adaptability and durability. In recent years more people have understood the benefits and the need for air purifiers. Our well-being is important, so invest in a product that will improve your quality of living.

I would recommend you to buy this air purifier because it comes at a reasonable price with such high-quality features. It is easy to use and maintain. If you haven’t purchased an air purifier and want to try it, this product would be the best introduction to the air purifier. So, don’t hesitate and invest in a product that enables you to have a healthy lifestyle.

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