Alen 45i Review: Unveiling the True Power of This Air Purifier

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This high-performance device has been gaining attention in the market for its ability to remove allergens, dust, mold, pet odors, and heavy smoke from the air.

In this article, we will give you an insightful review of this popular air purifier, focusing on its features, performance, and benefits.

We will examine how it handles various air pollutants and discuss the customization options available to make it a perfect fit for your home.

By the end of this article, you’ll have a clear understanding of whether the Alen BreatheSmart 45i is the right choice for your needs.

As you delve into the world of air purifiers, it’s important to explore different viewpoints and experiences from actual users.

So, in addition to our own analysis, we’ll also take a look at some of the real user reviews and testimonials that can help you make an informed decision.

We believe that considering all these aspects will enable you to determine if the Alen 45i is the best air purifier to improve your home’s air quality and enhance your overall well-being.

Alen 45i featured image

Overview of Alen 45i

Product Dimensions8.5″D x 15″W x 25″H
Floor Area800 Square Feet
Noise Level23 dB
Particle Retention Size0.1 Micron
Controller TypeButton Control
Item Weight15 pounds
ManufacturerAlen Corporation
Item model number45i-Pure

The Alen BreatheSmart 45i is a popular air purifier known for its customizable color options and suitability for large room coverage.

This air purifier features an H13 True HEPA filter, which can remove 99.9% of particles under 0.1 microns.

It offers an accurate auto-mode setting that allows for hands-off operation and provides real-time air quality feedback with Wi-Fi connectivity.

Although the Alen 45i is bulkier than some of its competitors, its performance in spaces up to 800 sq. ft. is impressive, boasting a CADR (clean air delivery rate) rating of 245 and 5 air changes per hour.

Additionally, the device is ultra-quiet and ozone-safe, featuring a lights-out option and an ionizer function.

However, like any product, there are some downsides to consider.

The standard filter in the Alen 45i lacks odor control, and power consumption increases even when the device is powered off.

Despite these cons, many users find the Alen 45i worthwhile for its overall performance and features.

Remember, when choosing an air purifier, it’s essential to consider your specific needs and preferences.

This brief overview of the Alen BreatheSmart 45i should help give you an idea of what to expect from this product.

Features of Alen 45i

Air Filtration System

The Alen BreatheSmart 45i features an H13 True HEPA filter that efficiently removes 99.9% of particles down to 0.1 microns in size.

This means it’s effective at capturing allergens, dust, mold, and pet dander.

However, the standard filter may lack substantial odor control, so consider upgrading to a filter with additional odor-fighting capabilities if needed.

Noise Level

You’ll appreciate the ultra-quiet operation of the Alen 45i, even when it’s working hard to purify your air.

According to a review, it runs quieter on average than comparable air purifiers.

Plus, it has a “lights-out” option, allowing you to enjoy a peaceful and restful environment at night.

Energy Efficiency

Alen 45i HEPA filters

While the Alen 45i efficiently purifies the air, it’s worth noting that it might consume power even when not in use, as mentioned in this test.

To optimize energy efficiency, consider unplugging the air purifier when it’s not needed.

Smart Sensor Technology

The Alen 45i boasts intelligent smart sensor technology, which includes app support and an accurate auto-mode setting that kicks in when pollutants are detected.

The real-time air quality feedback, coupled with Wi-Fi connectivity, makes this air purifier a valuable addition to maintaining a healthy home environment.

Alen 45i Performance Review

Efficiency in Different Room Sizes

The Alen BreatheSmart 45i is designed to purify the air in various room sizes efficiently.

It performs well in rooms up to 800 square feet, making it suitable for bedrooms, home offices, and even small living rooms.

In a test, the 45i was able to clean a room full of particle pollutants in just 33 minutes.

Its H13 True HEPA filter ensures that it captures allergens, dust, mold, and germs effectively.

To get the most out of your Alen BreatheSmart 45i, consider the following guidelines:

  1. Place the air purifier in the center of the room for optimal air circulation.
  2. Keep doors and windows closed to maximize its performance.
  3. Make sure there’s enough space around the device to avoid obstructing airflow.

Night Mode Performance

The Alen BreatheSmart 45i features a convenient night mode, which ensures a quiet and peaceful environment for optimal rest.

Alen 45i True HEPA filters

The night mode works by reducing the fan speed and dimming the LED lights on the air purifier.

As a result, you can keep the device running without disrupting your sleep.

In night mode:

  1. The air purifier operates at a lower noise level, making it ideal for light sleepers.
  2. The real-time air quality monitor continues to function, adjusting the fan speed accordingly.
  3. The night mode can be easily activated by pressing a dedicated button on the device.

Remember to change the HEPA filter according to the manufacturer’s recommendations to maintain optimal performance.

With proper maintenance, the Alen BreatheSmart 45i can be an excellent addition to your home, providing cleaner and fresher air for you and your loved ones.

Alen 45i Ease of Use

Setup Process

Setting up the Alen 45i is a breeze. Just unbox your air purifier, plug it in, and turn it on.

With its intuitive controls and real-time air quality monitor, you’ll quickly understand how to use it.

The air quality monitor displays the current air quality in your room, allowing you to make adjustments as needed.

This hands-off approach ensures that you can focus on enjoying clean and fresh air.


Maintaining your Alen 45i is hassle-free.

Its filter indicator shows when it’s time for a filter replacement, so you don’t have to worry about remembering replacement dates.

Filters last for a long time, giving you peace of mind that you won’t need to replace them too often.

Furthermore, the Alen 45i comes with a Lifetime Warranty, reassuring you that you have a high-quality and durable product.

Keeping your air purifier clean is simple.

Wipe down the exterior with a damp cloth to remove dust and dirt.

It’s important to keep the air intake and outlet grilles clean to ensure optimal airflow and efficiency.

With minimal effort, your Alen 45i will continue to perform at its best, providing clean air for years to come.

Alen 45i Price and Value

The Alen BreatheSmart 45i is a high-quality air purifier that offers great performance in a sleek and stylish design.

You might wonder if it’s worth the investment for your home or office. Let’s break down its price and value to help you make an informed decision.

This air purifier falls on the higher end of the mid-range market, with a price point of around $450.

You may think this is quite steep, but it’s important to consider the features and performance you’ll receive for your money.

The Alen 45i boasts five air changes per hour in an 800 sq. ft room, with a CADR rating of 245.

Not many other air purifiers in this price range can deliver the same level of performance.

In addition to having impressive air purification capabilities, the Alen BreatheSmart 45i offers a variety of smart and convenient features.

It has 4 speed options, a filter indicator, and even a dirt sensor.

Alen 45i Design

These features make it easy for you to maintain your air purifier and ensure you breathe clean and fresh air every day.

When it comes to noise levels, this air purifier has been highly praised by customers on Amazon for being quiet and efficient, even at the highest speed.

So, you can certainly expect it to operate with minimal disturbance to your everyday activities.

Ultimately, the decision to invest in the Alen BreatheSmart 45i comes down to your personal needs, budget, and preferences.

While it may come at a higher price point, the performance, features, and customer satisfaction it brings might just be worth the investment for you.

User Reviews

With the Alen BreatheSmart 45i, you’ll find that many customers are pleased with their purchase.

One user mentioned that upon opening the product, the experience was magical.

This might be an indication of the product’s high-quality build and design.

In another review, a customer shared that they were pleased with the performance of the air purifier.

Users appreciate how the device effectively keeps their living spaces clear and fresh.

As for concerns regarding noise levels, fear not. Check out this user’s experience.

They wanted an air purifier that would help with their coughing at night, but they were worried about the noise.

Luckily, they found the 45i to be very quiet, and even more impressively, their coughing stopped after two weeks of using it.

Lastly, another user mentioned that their $2000 investment in health was worth it.

With the 45i as their chosen purifier, they successfully improved their living conditions and well-being.

Alen 45i Air Purifier: Final Thoughts

The Alen BreatheSmart 45i is an air purifier that provides a nice blend of performance, features, and aesthetics.

Customizable color options, large room coverage, and a lifetime warranty are some of the top factors that work in its favor.

Unfortunately, it does have a few drawbacks, like a low CADR rating for room coverage and the lack of certain smart features.

This air purifier is packed with useful features like an H13 True HEPA filter that removes 99.9% of particles under 0.1 microns, an accurate auto-mode for hands-off operation, and real-time air quality feedback with Wi-Fi connectivity.

While it’s bulkier than some competitors, and the standard filter lacks odor control, it still gets the job done.

In terms of performance, the Alen BreatheSmart 45i excelled at cleaning the test room of all particle pollutants in just 33 minutes.

Additionally, users have reported excellent build quality and a noticeable improvement in the smell of their homes after using this air purifier.

The BreatheSmart 45i may not be perfect, but it’s a solid choice for anyone looking to improve the air quality in their home.

If you can overlook its shortcomings, you’ll have a reliable purifier that offers an impressive mix of performance and style.

READ NEXT: Alen Flex Air Purifier H13 – Is It the Best for Your Home? A Review