Alen Breathesmart 75i Review: Our In-Depth Analysis

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Alen BreatheSmart 75i Air Purifier
$769.00 $615.20
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11/25/2023 12:29 pm GMT

Expert Rating

Excellent Coverage | Removes 99.99% of Airborne Particles
  • Performance - 96%
  • Build Quality - 94%
  • Ease of Use - 93%
  • Noise - 96%
  • Value - 94%

Our Verdict

The Alen BreatheSmart 75i air purifier is designed for big areas up to 1300 square feet. It uses a specialized True HEPA filter to capture 99.99% of airborne particles. It boasts a CADR rating of 347 CFM, improving air quality within one hour. The device is quiet (25-50 dB) and easy to use, with features like an air quality sensor and smart app control. The price is a little steep, but the advanced filtration and large coverage area make this a great choice. 


  • Advanced True HEPA Air Filter: Effective at capturing 99.99% tiny airborne particles, including allergens and pollutants as small as 0.1 microns.
  • Large Coverage Area: Suitable for purifying air in large spaces up to 1300 square feet.
  • Smart Sensor with Auto Mode: Automatically adjusts to the current air quality, optimizing efficiency.
  • Energy Efficient: ENERGY STAR certification ensures lower electricity consumption.
  • Quiet Operation: WhisperMax Technology allows for near-silent running, ideal for noise-sensitive environments – 50 decibels on the highest speed setting.


  • High Initial Cost: More expensive upfront compared to many other air purifiers.
  • Size and Weight: Large and bulky, which might be inconvenient in smaller spaces.

Alen Breathesmart 75i Review

The Alen Breathesmart 75i has advanced technology to purify indoor air and improve quality. But the air inside can affect how we feel.

Air purifiers are now necessary for clean air, and the Alen Breathesmart 75i is a top choice. We will dive deep into the nuts and bolts of the Breathesmart 75i, looking at what it offers, how well it works, and what users think about it. But we’ll analyze how well it works and if it’s worth the money for people.

Knowing what this air purifier can do is important if you have allergies or worry about pet dander. This can also let you enjoy a breath of cleaner air right inside your home. But getting an air purifier can help you breathe easier inside.

The Alen Breathesmart 75i is listed as our best air purifier for pets and the best air purifier for mold, viruses, and bacteria.

Alen Breathesmart 75i review

Specs and Features

  • Dimensions 27 x 18.5 x 11.5 in (H x W x D) Weight 27 lbs
  • Coverage up to 1300 sq ft
  • CADR Rating 347 CFM
  • Filters True HEPA filter (captures 99.99% of particles 0.1 microns)
  • Filter Life 12-15 months
  • 5 speeds settings
  • Noise Level 25 – 50 dB
  • Energy Use 1.8 – 45 watts
  • Smart features include an air quality sensor, auto mode, and app control.

Design and Build Quality

The Alen Breathesmart 75i boasts a sleek and contemporary design, blending into any modern home decor. It is sized to be discreet yet effective in larger rooms, measuring 27 inches in height, 18.5 inches in width, and 11.5 inches in depth. This air purifier is sturdy and made with first-rate materials that promise to keep it kicking for years.

One of the unique aspects of the Alen Breathesmart 75i is its customizable front panel. Users can choose from various designer panels to match style or interior design. This feature underscores Alen’s commitment to aesthetics without compromising functionality.

The robust build of the device is beautifully balanced by its aesthetic appeal. The intuitive control panel is located at the top, making it accessible for adjustments. The Breathesmart 75i isn’t just a top-notch air purifier with an aesthetic charm that can make any room look better.

Height27 inches
Width18.5 inches
Depth11.5 inches
Weight27 pounds
Alen Breathesmart 75i top controls

Features and Technology

The Alen Breathesmart 75i distinguishes itself in the air purifier industry due to its advanced features and technology. With exceptional filtration capabilities, this HEPA air purifier effectively cleans even large, open-concept areas.

The carbon filter removes harmful Volatile Organic Compounds (VOCs) and neutralizes unpleasant pet odors.

True HEPA Air Filtration and Air Cleaning

At its core is a powerful True HEPA filter, capturing 99.99% of particles as small as 0.1 microns. The Breathesmart 75i has a pre-filter. The pre-filter catches bigger particles and makes the HEPA filters last longer. 1

The multi-layer filtration approach offers superior air quality compared to other models. It’s a great choice for removing indoor allergens like dust, pollen, pet hair, and smoke. 2

The filter indicator lets you know when filter replacement is necessary. The air quality indicator light changes color to reflect the current air quality level. It detects bad air quality and indicates when the air is clean again.

Ionizer Technology

The Alen Breathesmart 75i utilizes an ionizer that produces negative ions to help clean the air. Unlike positive ions, negative ions do not produce ozone, which can be harmful. Instead, the negative ions attach to tiny particles in the air, like dust and pollen, so that the HEPA filter can catch them easily.

The ionizer and the filter work in tandem to clean the air. UV lights are not a feature of this model. Silver ion threads are woven into the filters to prevent the growth of mold, bacteria, and germs.

Smart Home Air Purification

Improve your air quality with the Alen BreatheSmart 75i. It has SmartSensor technology that adjusts fan speed automatically. The feedback changes color from purple to blue to show air purity levels. It’s perfect for new homes and living spaces.

The Smart Sensor checks air quality in real time. Depending on the air quality, the sensor allows the cleaner to adjust its fan speed in Auto mode to clean the air automatically.

Installing the Alen Air app, you can use wireless control of the Alen Breathesmart 75i. The app provides detailed reports on air quality and remote control of its features.

Noise Levels

The Breathesmart 75i WhisperMax technology is an innovative aspect of this product. It’s great for bedroom use at night because it’s quiet, only 25 decibels on low speed.

Even when going faster, the 50 dB noise is 15 decibels quieter than other purifiers, so it’s one of the quietest. From the chart below, you can see that the Alen 75i is quieter than your home refrigerator.

Environmental NoiseDecibel Level
Quiet natural area with no wind, rustling leaves20
Suburban area at night, quiet library, soft music40
Household refrigerator, moderate rainfall55
Business office, dishwasher, normal conversation60
Vacuum cleaner, traffic, shower75
Alarm clock, city traffic85
Lawnmower, chainsaw110

Improving Sleep Quality

The BreatheSmart 75i has HEPA filtration. It is SleepScore Labs certified to improve sleep. A peer-reviewed study proved this.

The machine is quiet and makes pink noise that helps you sleep better. This air purifier is great for bedrooms. It helps you sleep well and wake up refreshed.

True HEPA Air FilterCaptures 99.99% of airborne particles, down to 0.1 microns
Smart SensorDetects air quality and adjusts settings
Auto ModeAdapts fan speed to current air quality
WhisperMax TechnologyEnsures quiet operation

Performance and Efficiency

The Alen Breathesmart 75i provides clean air across large areas. It is rated to cover up to 1300 square feet, making it suitable for large rooms and open spaces. The purifier’s CADR is impressive. It ensures quick and efficient air purification.

When I tested it, the Alen BreatheSmart 75i did an excellent job removing smoke, dust, and other particles from the air. I set up a 150 sq ft room and filled it with smoke, then measured the air quality over 1 hour with the air purifier running high.

The high CADR rating of 347 CFM was evident as the unit filtered the smoky air rapidly. The purifier remained quiet and unobtrusive in my tests, even on the highest fan setting.

The Breathesmart 75i is ENERGY STAR certified. It uses very little energy, which is good for the environment and your electricity bills. 3

The filter life of the Breathesmart 75i is noteworthy as well. This cleaner lasts 12 to 15 months, so you don’t have to replace it often. This longer filter life contributes to the cost-effectiveness of the unit over time.

Performance MetricValue
Coverage AreaUp to 1300 sq ft
CADR Rating347 CFM
Energy EfficiencyENERGY STAR Certified
Filter Lifespan12-15 months

Cost of Replacement Filters

You can purchase Alen Breathesmart 75i replacement filters from Amazon. However, having an Alen active filter subscription engages a lifetime warranty. An Alen replacement filter costs $99 to $139.

Alen Breathesmart 75i filter

User Experience and Setup

Setting up the Alen Breathesmart 75i is easy, making it user-friendly and hassle-free. Upon unboxing, users find the air purifier ready for immediate use, with minimal assembly required. The intuitive design extends to its operation.

The control panel is simple to use. It shows air quality, filter life, and speed settings. Users can choose different modes, like Auto mode, to adjust using the Smart Sensor.

The Breathesmart 75i doesn’t have mobile app integration, but it’s designed for easy and direct control. Users who like simple, hands-on interaction appreciate this approach. The LED display shows air quality in real-time, changing colors to show current air quality conditions. Users find it helpful and reassuring.

Customer Reviews and Ratings

Customer feedback on the Alen Breathesmart 75i is positive. Users love how it improves air quality, reducing allergies and asthma symptoms.4 The unit is quiet, even at high speeds, which is great for bedrooms and noise-sensitive areas.

The unit costs a lot, but many users think it’s worth it for how well the purifier works and its good construction. The long filter life and energy efficiency are also appreciated, reducing long-term costs.

Consumer Reports rates the Alen Breathesmart 75i highly for its performance. Users like that the feature shows the air quality history, giving them insights into their home’s air quality trends.

Customer RatingPercentage
5 Stars80%
4 Stars10%
3 Stars and Below10%
Alen Breathesmart 75i back

Price and Value for Money

The Alen Breathesmart 75i falls under the higher price range, but its long-term value should not be overlooked. Its effective air purification, energy-efficient operation, and extended filter lifespan minimize ongoing costs.

The Breathesmart 75i is worth the money due to its sturdy build and impressive air-cleaning performance. The Alen company provides consumers peace of mind through its warranty, although you need the Alen filter replacement subscription for the lifetime warranty.


Is Alen BreatheSmart worth it?

The Alen BreatheSmart air purifier features true HEPA filters, quiet operation, and coverage for large areas. It does have a hefty price tag, but with the medical-grade air filtration, you will find it’s worth every penny.

How long do Alen BreatheSmart filters last?

Alen BreatheSmart filters last 12 to 15 months, operating 24 hours a day, 7 days a week, depending on air quality conditions.

Conclusion and Recommendations

The Alen Breathesmart 75i is a top-tier air purifier in performance, design, and user experience. This air purifier is a great option for indoor spaces because it has a sophisticated filter, smart functions, and runs.

While the price point is higher, its quality and efficiency offer good value for money in the long run. If you have allergies, asthma, or a large living space, use the Breathesmart 75i.

  1. Alen: Guide to Alen Air Purifier Maintenance and Filter Replacement: Unlocking Optimal Performance and Prolonged Lifespan
  2. United States Environmental Protection Agency: Indoor Particulate Matter
  3. Energy Star: Alen BreatheSmart 75i
  4. The American College of Allergy, Asthma, and Immunology: Air Filter | Treatment

Hubert Miles | Licensed Home Inspector, CMI, CPI

Hubert Miles is a licensed home inspector (RBI# 2556) with more than two decades of experience in inspection and construction. Since 2008, he has been serving South Carolina through his company, Patriot Home Inspections LLC. As a Certified Master Inspector, Hubert is dedicated to providing his expertise in home inspections, repairs, maintenance, and DIY projects.