Alen BreatheSmart FIT50 HEPA air purifier review – how to change replacement filter?


Alen BreatheSmart FIT50 HEPA air purifier cleans 900 SqFt in every 30 minutes at a whisper-quiet level. A compact workhorse fits in any space from bedrooms, living rooms, gyms, offices, nurseries, kitchens, basements, and open concept areas. Advanced WhisperMax technology creates a soothing environment while producing a pink noise that promotes better deeper sleep. 4 fan speed settings for optimized air purification. Discover more in Alen BreatheSmart FIT50 HEPA air purifier review.

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In the box

Here’s What You Get When You Buy This Air Purifier:

  • HEPA Pure filter
  • HEPA Silver filter
  • HEPA Fresh Plus filter
  • HEPA Odorcell
  • Lights Out option

Pros & Cons – Alen BreatheSmart FIT50 HEPA air purifier


  • The primary filter is H13 grade True HEPA filter
  • Freedom to choose the filter as needed
  • Enables you to customize the front panel
  • Generates pink noise to improve your sleep quality
  • Has an air quality sensor with a real-time colored indicator
  • Optional Ionizer, child lock button
  • Sleek, modern design, incredibly quiet
  • Lifetime warranty


  • No remote control, not Wi-Fi enabled
  • Slightly expensive

Specifications – Alen BreatheSmart FIT50 HEPA air purifier

  • Filtration: Four filter options: HEPA-Pure, HEPA Silver Carbon, HEPA FreshPlus, and HEPA OdorCell.
  • HEPA class: H13 HEPA
  • Filter life: 9 – 12 months
  • Filter Replacement Indicator: Yes
  • Maximum CADR: 231 cubic feet per minute (cfm)
  • Room Coverage: 345 square feet with 5 air exchange per hour (ACH)
  • Sensors: Dust sensor
  • Number of manual fan speed: 4
  • Automatic mode: Yes
  • Size: 22.25″H x 16.75″W x 10″D
  • Device weight: 16 lbs
  • Noise level: 32 – 49 dB(A)
  • Rated Power: 60 Watt
  • Voltage: 120 V AC 60 Hz

Price and availability

The Alen BreatheSmart FIT50 is not a cheap device. This will likely come as no surprise, as the Alen BreatheSmart FIT50’s price initially is $549. The Alen BreatheSmart FIT50 is a genuine high-end air purifier. It boasts a market-leading room coverage, the latest Smart Sensor under the hood and a backup lifetime warranty service.

Alen BreatheSmart FIT50 replacement filter cost

Filter Cost:
Changing your HEPA-Pure filter on schedule every 12 months averages out to $6.58/month.

Filter Replacement Cost

FilterCostChange Frequency
HEPA-Pure Filter$79every 12 months
HEPA-Silver Filter$89every 12 months
HEPA-FreshPlus Filter$119every 12 months
HEPA-OdorCell Filter$129every 12 months

Power Cost:
Running the BreatheSmart FIT50 on high speed, 24 hours a day will result in a power cost of $6.48/month.

Power Consumption Cost

Unit Power on High:60 watts
Cost of Electricity from Utility:15 cents/kWh
Your Daily Power Cost on High:21.6 cents per day
Your Monthly Power Cost on High:$6.48/month on high

Compare Alen BreatheSmart FIT50 HEPA air purifier vs BreatheSmart 75i

Alen Air Purifier:BreatheSmart 75iBreatheSmart 45iBreatheSmart FIT50
Max. Coverage Area:1,300 square feet800 square feet900 square feet
CADR Rating:350245220
Max. Airflow:347 CFM215 CFM231 CFM
Power Output:1.8 – 45 Watts1.1 – 50 Watts1.2 – 60 Watts
Filters:75i True HEPA (H13)45i True HEPA (H13)True HEPA Pure (H13)
Filter Lifespan:Filter Price:12 Months$$$$12 Months$$$$12 Months$$$$
Noise Levels:25-49 dB23-49 dB32-49 dB

Alen BreatheSmart FIT50 HEPA air purifier review


This air purifier has a modern, stylish design that fits with any decor in your home. It measures 10 by 16.75 by 22.25 inches and weighs 16 pounds. As such, it takes little space in your home or office. You can place it anywhere in your home or office.

LED indicator

It has 3 lights: green, yellow and red. It will be green regularly. The yellow light will appear quickly before your filter should be replaced. Start to find a new filter because when it turns red, you will have to change the filter immediately.

Color variation

White in color, it harmonizes your style. What you need to know is that you can enhance your personal style with custom designer panels. These panels come in seven colors: White, Brushed Stainless, Graphite, Weathered Gray, Rosewood, Oak, and Espresso.


The Alen BreatheSmart FIT50 once again recovers the ionizer function, to improve its performance with the 3-stage air cleaning system, with the core is one of the 4 HEPA air filter types below.

  1. HEPA-Pure – The standard HEPA filter of Alen BreatheSmart FIT50, which is able to capture 99% of as small as 0.3 microns pollutant particles such as dust, dust mites and pollen.
  2. HEPA-Fresh – The next level HEPA filter will improve the first HEPA-Pure, with an addition of Activated Carbon filter, to deal with the household odors like cooking smells and light smoke. This air filter is necessary for people who are sensitive to VOCs.
  3. HEPA-Silver – For a little bit more money, you can upgrade to the HEPA-Silver filter with anti-microbial Silver-Ion threads that prevents the growth of mold spores and bacteria.
  4. HEPA-OdorCell – The ultimate level HEPA filter of Alen BreatheSmart FIT50, with the unique Alen’s Molecular Conversion Powder, that can destroy the odors on a molecular level.


At the lowest fan speed, it generates a noise level of 32 dB. This is similar to devices such as a refrigerator. The noise is also identical to the library or a quiet street at night.

The frequency of the pink noise improves your sleep by 25%. For a perfect sleeping environment, you can dim the display lighting with one touch.

  • Speed 1 – 32.4 dB (whisper)
  • Speed 2 – 38.5 dB (light rainfall)
  • Speed 3 – 44.5 dB (heavy rainfall)
  • Speed 4 – 48.7 dB (box fan, medium)

At the highest fan speed, the purifier generates 49dB. The noise level is still on the lower side compared to other models. At 49dB, you can carry out a normal conversation without shouting.

Room coverage

Alen Fit50 is a mid-sized air purifier. You can put in a 900 sq ft space and it will filter out air pollutants every 300 minutes (based on the CFM calculation). That means it will achieve 2 air changes per hour in 900 sq ft rooms.

To produce an even better indoor air quality, you should shot closer to 5 air changes per hour (5 ACH). That means that Alen BreatheSmart Fit50 should clean all the air in the room every 12 minutes.

*The room size calculation is based on an ideal situation. For best practice, consider the size of the room a little less than the calculated value.

ConditionRequired minimum Air Changes per Hour (ACH)Suitable Room Size (8 ft ceiling)The time it takes to clean the air in the room
Normal2865 sq ft30 min
Allergies and/or asthma5345 sq ft12 min
Smoke or highly contamination8215 sq ft8 min

CADR rating

The CADR rating is the measure of air purifier efficiency at removing airborne pollutants. Basically, it’s the most important metric based on which we can differentiate between air purifiers based on performance.

Alen BreatheSmart Fit50’s CADR rating is 220. CADR is a 0-450 scale; Fit50 is somewhere in the middle. Not the best, not the worst, just right for standard-sized rooms. Of course, it can’t compare to the Alen BreatheSmart 75i’s 400 CADR rating. 

Another important aspect is how much airflow must Alen BreatheSmart Fit50 generate to achieve the 220 CADR rating. In this case, Fit50 generates 231 CFM at Turbo Speed. That’s usually isn’t optimal; when CFM is higher than CADR, that means a lot of airflow, and a lot of airflow equates to higher noise levels.

How Alen BreatheSmart FIT50 HEPA air purifier works?

Alen FIT50 Customizable Air Purifier with HEPA Filter to Remove Allergies & Dust

Alen BreatheSmart FIT50 has a 3-stage HEPA-style filter system and is customizable.

The first is a washable pre-filter. Air passes through it first, and the largest particles such as dust, lint, and hair are captured there. It also helps to extend the main filter life.

Then comes the HEPA-pure filter. It removes 99% of particles greater than 0.3 microns from the air, such as pollen, pet dander, mold spores, and other airborne pollutants. For more specific filtration, you can upgrade the HEPA filter. Paying an extra $15, you can get HEPA-silver, which is great for germs and bacteria. Paying $20, you can get a HEPA-FreshPlus filter, which is perfect for chemicals and VOCs. But for paying an extra $30, you will get HEPA-OdorCell, this will handle smoke and heavy odors.

Ozone-Safe Ionizer. This comes as the last step. It delivers negative ions into the air. That helps the air purifier capturing particles more efficiently while purifying your indoors.

Alen BreatheSmart FIT50 HEPA air purifier customer review

Love Our New Purifier from Alen!!

!We recently purchased your purifier to contain dust, mold, and other air problems so persistent in the Houston area!! We noticed a difference almost immediately and look forward to adding another one just like it to accommodate our apartment needs!! We are bragging about it to everyone we cone in contact with!! We are so grateful to you for this iRead more about review stating Love Our New Purifier from Alen!!

By Billie B. at Alen

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