Alen Breathesmart 75i review

The BreatheSmart 75i is the newest model in Alen’s popular line of air purifiers. It features a lowering noise level and improved HEPA filter quality for removing smaller particles that can cause illness or democratize your home with harmful chemicals from larger rooms like those found near windowsills where natural light enters but no fresh outside breezes enter!

The Alen BreatheSmart 75i is the biggest and most powerful air purifier from Alen. This quiet giant can cleanse up to 2,000 square feet of space. According to a spec-by-spec analysis of 529 air purifiers, the Alen BreatheSmart 75i is the best overall air purifier in 2024.


Examining the Alen Breathesmart 75i, here are some specs that caught my attention. Area coverage is a significant highlight, up to 1300 square feet. That’s impressive! As well as its ability to purify the air in a large room every 30 min, it makes it an ideal choice for open concept homes or offices.

Below is a brief breakdown of this high-capacity machine:

Coverage AreaUp to 1300 sq. ft.
Air Change per Hour (ACH)2X
Filter TypeTrue HEPA
Smart SensorYes
Noise Level49 dB
Energy Consumption45 watts
Size27″ x 18″ x 11″

Alen Breathesmart 75i Review

A Perfect choice for large rooms

Alen BreatheSmart 75i

The B7 Pure Filter is a HEPA air purifier designed for large rooms and open-concept spaces. It can remove airborne allergens, dust, pollen, pet hair, mold, and other harmful particles as small as 0.1 microns.

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Alen Breathesmart 75i


The BreatheSmart 75i is a powerful air purifier that is just over two feet high and weighs about 27 pounds. It is sleek and low-profile, making blending into your home’s decor easier. There are different finish options to choose from, so you can match the unit with your home’s style.

The air intake vents are on the sides of the purifier, so you can put it against a wall. It’s easy to move because it has small wheels on the back and a hidden handle.

Our favorite design aspect of this computer is the customizable front panel. This lets you choose a design that matches your furniture. You can choose from designs like marble, graphite, and white-washed wood.

What are the different colours available in Alen BreatheSmart 75i ?

The Alen BreatheSmart 75i offers a variety of colors and finishes to fit various home decors. Although specific color options were not detailed in the sources, Alen typically offers a range of choices including white, graphite, and other designer options that allow the unit to blend seamlessly into any room’s aesthetic.


The BreatheSmart purifier has a simple interface with seven buttons for easy programming.

You can turn the on and off the ionizer with one button and the auto mode setting. Pressing the speed button lets you cycle through all five fan settings to set the power output manually. You can also engage the timer button with one press.

There are other controls too, like a button to activate the child lock. This is useful if you have kids and they keep hitting the buttons on accident.

There are three small lights on top of the filter button. They will tell you when the air filter is clean or needs to be replaced. You can reset the countdown by holding this button down. The power switch is in the center of the control panel. The circular indicator light around the button tells you how pure your air is. Blue means excellent quality, and purple means very unhealthy air.

There’s a Wi-Fi symbol in the corner. These units don’t have Wi-Fi. They also don’t work with controllers. This is probably a feature that was never put into the final product.

Aside from this one confusing thing, the BreatheSmart is really easy to use and simple.


alen 75i hepa filter

This air purifier has WhisperMax technology, so you won’t hear it cleaning the air every 30 minutes. It uses pink noise, which is less abrasive than white noise. It offers minimal disruptions throughout your day and night. The filter will last at least a year, so you can feel consistently protected from allergens, viruses, asthma triggers, and smoke. The BreatheSmart 75i can undoubtedly improve your and your family’s health with true HEPA, self-adjusted cleaning power, and a lifetime warranty.

We look at the quantity and quality of air filters when deciding how good an air purifier is. The Alen BreatheSmart 75i has the typical Alen 3-stage air cleaning system. However, it also has a True HEPA air purifier, which means it can remove more particles from the air.

The Alen BreatheSmart 75i has been redesigned to include a Heavy Odor filter. This filter can remove the smells from everyday activities, like smelly kids/teenagers, kitchen garbage, and more. The filters are the most important part of an air purifier. This is as true for the Alen BreatheSmart 75i as for any other air purifier. While most air purifiers use several layers of generic filters, Alen uses superior all-in-one filters that combine.

What type of HEPA Filter do you get with Alen BreatheSmart 75i?

The core of the Alen BreatheSmart 75i’s effectiveness lies in its advanced HEPA filtration system. It comes equipped with a True HEPA filter, which captures 99.97% of particles as small as 0.3 microns. This includes common allergens like dust, pollen, pet dander, and smoke, as well as harmful VOCs (volatile organic compounds) and bacteria. The device also features a proprietary antimicrobial treatment on the HEPA layer, which inhibits the growth of bacteria and fungi, ensuring the filter maintains its effectiveness over time.

Alen BreatheSmart 75i True HEPA Antimicrobial Filtration System

H13 True HEPA filters are the best type of filter for removing air particulates. They are able to remove particles that are 3x smaller than other types of filters (0.1-micron), and they are also 99.99% efficient.

The next level of HEPA filter will improve the first Pure, with an addition of an Activated Carbon filter to deal with household odors and chemicals. This air filter is necessary for people who are sensitive to VOCs.

Activated carbon filters are designed to absorb bad smells. This type of filter uses charcoal to capture smells like cigarette smoke, cooking smells, and diaper smells.

The Alen BreatheSmart 75i has a unique design that is specifically made for that model. All of the filters include a True H13 HEPA filter and have antimicrobial protection. The difference between the filters is primarily in the amount of activated carbon and size.

 Pure, Fresh, Pet, Heavy Odor Filters

backside of alen breathesmarth 75i

 Pet air filter

The Pet air filter uses Alen’s patented Molecular Conversion Powder to ensure that heavy pet odors are destroyed at a molecular level.

The Alen BreatheSmart air filtration system seems to work the best against all types of allergens. As a result, Alen hasn’t changed much from the formula of success for this brand. The Alen BreatheSmart 75i uses new plastic filter frames with detachable pre-filter for easy cleaning.

Some people say that the Alen BreatheSmart 75i air purifier true HEPA filter is better than the Rabbit Air MinusA2 or Blue Pure 121. But we don’t believe those claims. We tested these three purifiers to see how they work in a room of 300 square feet.

We tested two air purifiers, the Rabbit Air MinusA2 and the AIRMEGA 400S, to see how they compare to the Alen BreatheSmart 75i.

All three air purifiers are worth the money you pay for them because they can trap 99.97% of particles that are as small as 0.3 microns. This is better than the previous Alen BreatheSmart, which only trapped 99.92% of particles.

alen breathesmart 75i review

There is no need to tell that the Alen BreatheSmart 75i air purifier is the best one this company has. But the cost of the True HEPA air filter has increased, too. For the standard Pure filter (the B7-Pure), the cost is $99. You need to pay $139 for the Pet (B7-MP-Pet) and Heavy Odor (B7-MP-Odor) air filters.

Air performance

The Alen BreatheSmart 75i is a powerful air purifier that can clean large areas. With 1300 square feet of room coverage, this purifier can handle even the largest rooms. And on the lowest speed setting, it can still clean a room of 350 square feet quickly and easily.

For a room that is 1300 square feet, this air purifier will clean the air twice an hour. However, if your room is much smaller than 1300 square feet, you will enjoy the new fresh air every 12 minutes.

The CADR of the Alen BreatheSmart 75i is 355 Dust/ 350 Smoke/ 400 Pollen (cfm). I must acknowledge that the fan power is good, but it is still quite insufficient for the actual room coverage of 1300 square feet.

This fan power is weaker than the trio of Dyson Pure Cool Link, Dyson Pure Hot+Cool, and Dyson Pure Cool Tower. This is because the Dyson air purifiers are designed to be both cooling fans and air purifiers. The CADR rating only tells you how quickly the air purifier can clean the air in your room. It doesn’t tell you how well the air purifier works.


The Alen BreatheSmart 75i is extremely quiet, especially for a cleaner with a True HEPA core. The noise level at the lowest setting is only 25 decibels, which is quieter than the Rabbit Air MinusA2. In fact, the MinusA2 is now the most silent air purifier in the world. To help you understand how quiet it is, it is just about as loud as a rural area at night time.

This noise level is much quieter than a conversation you would have at home. In fact, it is so quiet that you probably won’t even notice it.

And don’t forget the wonderful pink noise frequency of this Alen BreatheSmart 75i. Pink noise consists of different frequencies, but the volume decreases whenever the frequency doubles. As a result, it will help you sleep faster or increase your productivity and creativity at work.


The Alen BreatheSmart 75i air purifier is the latest model and is really good. It is a reasonable size, 18.5 x 27 x 11.5 inches, and it has a modern design. You can change the look of the air purifier by using different panels.

This air purifier is on the heavier (27 pounds) side, but it’s not impossible to carry. It has air inlets on the sides and a back handle to help with portability. The fit is tight, so there won’t be any harmful byproducts released. Plus, it’s CARB-approved and ozone-safe. Alen also guarantees reliability with a lifetime warranty.

The airflow delivery rate is from 150 cfm to a max of 286 cfm (turbo speed). On the other hand, CADR is estimated to be around 300 cfm for dust, pollen, and smoke. The vacuum cleaner works great in living rooms, lounges, bedrooms, basements, garages, kitchens, and playrooms.

Energy efficiency

This Alen purifier uses only about 45 watts of energy very energy-efficient, even at its highest setting. As their website points out, this is less than the power used by a lightbulb. If you plan to keep your purifier running consistently and keep the air quality in your home clean, it will only need 1.8 watts of electricity to run at its lowest speed, it’s important to consider how efficient it is in terms of energy consumption.

The BreatheSmart 75i is an Energy Star-certified air purifier with multiple power-saving modes, including auto mode. This mode adjusts the fan output based on the air quality in the room. The timer mode is perfect for freshening the air after cooking disasters or other smelly accidents.

Price & Value.

The Alen BreatheSmart 75i air purifier costs between $700 and $800. This may seem expensive, especially compared to the $100 air purifiers available. But there are several reasons why you might want to consider spending the extra money on this particular model.

The Alen BreatheSmart 75i is a great value because it can clean the air in your home as effectively as 4-5 small $100 air purifiers. This air purifier is much better than any other one that is less than $500.

If you were to replace the filters in each $100 unit every year, it would cost about $100/year for each unit. That’s a total of $500 for replacement filters. Alternatively, you could purchase the Alen BreatheSmart 75i replacement filter, which would cost $130.

The Alen BreatheSmart 75i is about $750 before the addon panels and filter upgrades are accounted for. That’s about a $100 more premium over the Alen BreatheSmart Classic for a slight performance boost and WiFi-enabled feature.

The all-in-one filter set is convenient to replace, and at a reasonable under 100 price, there is no option to replace them individually. We think the air filtration performance is worth the cost, but you could also consider cheaper Alen BreatheSmart alternatives.

User Experience 

Some people who have an Alen air purifier decided to try the 75i to see if it was better than the other ones. They liked the BreatheSmart and BreatheSmart45i, but most people who bought the 75i found that it had better room coverage and quieter features. They also like the performance, which includes enough air pollution removal, Smart capabilities, and a touch display.

Customers also said that the BreatheSmart 75i customer service team was helpful. If there were any problems with the air purifier, they would help. Alen offers a 60-Day Love, Or Return It promise, so you can be sure that you are satisfied with your purchase. Plus, there’s a lifetime warranty, so you know that you’re covered if anything goes wrong.

Noise Levels Test Results

During my time with the Alen BreatheSmart 75i it was clear this air purifier took its job seriously – clean air should not sacrifice peace and quiet. And let’s face it folks – noise level is a crucial factor to consider when buying any machine for your home.

As I used the 75i purifier in my 1300+ sq. ft. living room I watched some late-night shows without the need to crank up the volume. What makes this possible is the 75i’s smart sensor technology. This advanced feature adjusts the fan speed in real-time providing both effective air purification and noise control.

To understand the real impact let’s take a look at some numbers:

Fan SpeedNoise dB
Low25 dB
Medium42 dB
High49 dB

To put it into perspective: A whisper in a quiet library reaches 30 dB. An average home noise sits at 40 dB. So even at its highest setting it was still quieter than most typical home noises.

Further addressing the noise concern the 75i houses a so-called WhisperMax Technology a patented design that eliminates high frequency sounds and producing a soothing pink noise. This pink noise aids in sleep a great addition for those planning to use it in their bedrooms!

It’s these thoughtful inclusions that affirm my positive impression of the 75i as a capable quiet air purifier. It’s not every day you come across a machine that can balance performance with serenity effortlessly.

However keep in mind these were my findings based on testing in my own living space. Your experience could vary based on room size external noise factors and personal perception of noise.

Looking at the practical evidence and clever additions the Alen BreatheSmart 75i has met and exceeded my expectations when it comes to noise levels. And that’s just the decibel part of it…

is the Alen BreatheSmart 75i loud?

One of the remarkable features of the Alen BreatheSmart 75i is its WhisperMax technology, designed to minimize noise levels. This makes it one of the quietest air purifiers on the market. At its lowest setting, it’s barely audible, making it ideal for bedrooms, nurseries, and any space where noise could be a concern. Even on higher settings, the noise generated is unobtrusive, blending into the background of daily life.

Pros & cons

  • The Alen BreatheSmart series has the strongest airflow performance. It can clean up to 1,300 square feet of room space.
  • This machine can be turned off to completely remove ozone from the air.
  • All upgradable H13 HEPA filters come with a treatment to stop the growth of microorganisms.
  • This filter can last up to 18 months on normal use.
  • This printer operates quietly at high speeds, minimizing noise disruption. Very low noise output
  • This is an expensive top-of-the-line model.
  • The basic HEPA Pure filter does not remove smoke, chemical, or odor pollutants. If you want to remove gaseous pollutants from the air, you will need to upgrade to the Fresh/ Pet/ Heavy Odor filter.
  • The all-in-one filter set cannot be replaced individually, but fortunately, the cost is still reasonable.
  • The air purifier is bulky and heavy, which limits the places you can put it.
  • Some misleading labeling & No remote controller
  • Adding Wi-Fi support would be a nice extra feature for this price range.

Verdict: Is it worth the money?

We spend a lot of time in our homes. Reducing the number of pollutants inside your home is a simple step everyone should take to improve their health and quality of life. Some common pollutants are smoke, dust, pet dander, and chemical fumes.

The Alen BreatheSmart 75i Air Purifier uses a true HEPA filter and a powerful cleaning system to remove allergens, odors, toxins, and pathogens from the air. It has a sleek design and an easy-to-use control panel. Plus, it’s quiet and energy-efficient and comes with a lifetime warranty.

The Alen BreatheSmart 75i is powerful and quiet. It is easy to operate. The only downside is that it costs a lot to use over time and it is expensive to buy. However, this machine is very quick and effective if you need an air purifier for a large space.

The Alen BreatheSmart air purifier is the best because it has a high CADR rating, H13 HEPA filters, and very low noise levels. It also has great features like Sensor Smart tech and is affordable with the lowest possible maintenance cost.


How effective is the Alen BreatheSmart 75i air purifier?

The Alen BreatheSmart 75i is highly effective in purifying air, with the added benefit of quiet operation. It uses smart sensor technology to adjust the fan speed which ensures effective air purification while controlling noise levels.

What makes the Alen BreatheSmart 75i quieter than other air purifiers?

The 75i features WhisperMax Technology that eliminates high frequency sounds and produces soothing pink noise. Additionally, its smart sensor technology adjusts fan speed in real-time, contributing to its quiet operation.

How does the Alen BreatheSmart 75i perform in terms of noise levels?

Even at the highest setting, the 75i is quieter than most typical home noises. Thus, it is suitable for use in bedrooms or quieter environments requiring minimal disruption.

What is the overall verdict of the author on Alen BreatheSmart 75i?

I conclude that the Alen BreatheSmart 75i is an effective and quiet air purifier that exceeds expectations in terms of noise control, making it an optimal choice for those seeking noise-controlled purification.

Photo of author

The author is an Air purifier expert with overall knowledge of air and ionizers.