Alen BreatheSmart HEPA Air Purifier Review

Let's kick start Alen air purifier review with its top of the line model; The Alen BreatheSmart HEPA air purifier. One of the most robust and highest purifying coverage  paired with WhisperMax and SmartSensor technology,  Alen BreatheSmart has emerge as consumers preferred model in choosing a highly capable air purifier; hardly any surprise at all. What effective it is against airborne pollutants and what is the annual filter replacement cost? Continue reading to learn more about Alen BreatheSmart and its personalizable front cover.
+- 599
     Annual filter ^    
+- 46 - 138
Online price*
    Latest Amazon price    
Check Amazon price

Alen BreatheSmart Classic Specification

ProductAlen BreatheSmart Classic
RSPRetail suggested cost +- 599
17.8 x 26.8 x 10 in
(45.2 x 68.1 x 25.4 cm)
Weight21 lb (9.5 kg)
Coverage (up to)1100 sq. ft. (102 m2)
Dust free (CADR)300 cfm (510 m3/h)
Pollen free (CADR)300 cfm (510 m3/h)
Smoke free (CADR)300 cfm (510 m3/h)
Airflow speed150-286 cfm (255-486 m3/h)
A filterAnnual filter cost ($)+- 46 - 138
- Lifespan
- Replacement cost ($)
HEPA filter
- Lifespan
- Replacement cost ($)
HEPA-Pure Filter BF35
6 - 18 months
+- 69
Carbon filter
- Lifespan
- Replacement cost ($)
Ionizer/ TechnologiesIonizer
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Optional/ Addon
6 - 18 months+- $79
HEPA-OdorCell Filter BF35-MP
6 - 18 months+- $109
HEPA-FreshPlus Filter BF35-VOC
6 - 18 months+- $89
Noise level42 - 56 dB
Power consumption64 - 105 W
Timer/ Scheduler4, 8, 12 hours
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
WarrantyLifetime Limited Warranty
Email/ Phone support

Product images

Alen BreatheSmart Classic key features

  • 3-stage filtration with ionizer
  • Washable pre-filter
  • HEPA-Pure filter
  • 4 fan speeds with auto mode
  • Advanced SmartSensor
  • Personalizable front cover panel
  • Child-lock control panel and child-safe vent guard
  • 4, 8, 12 hour Pre-set timer
  • Smart Filter Light indicator
  • Lifetime limited warranty
  • [Optional] filters - HEPA-Silver filter, HEPA-FreshPlus filter, HEPA-OdorCell filter

The starters

Alen BreatheSmart Classic dimension
17.8 x 26.8 x 10 in
(45.2 x 68.1 x 25.4 cm)
Alen BreatheSmart Classic weight
21 lb (9.5 kg)

At a conventional air purifier size of 17.8 x 26.8 x 10 in, Alen BreatheSmart Classic is one of the most modern, eye-pleasing air purifier in its class thanks to the front wood trim cover design. Up to 14 front cover panel to ranging from Brushed stainless steel to Weathered grey, there is definitely 1 design that would suit your home decor. Weight wise is considerably light for its segment at only 21 lb, you could easily carry the air purifier via its back handle. Operating Alen BreatheSmart Classic air purifier is super easy with separate large round button and dedicated indicator light. Standard list of equipment includes 3-stage filtration with 4 fanspeed, washable pre-filter, HEPA-Pure filter, Ionizer, SmartSensor with auto mode, air quality indicator, quiet WhisperMax technology, Advanced Smart Filter that calculates filter replacement life based on usage/ environment, sleep mode, child lock, Auto-off safety feature which disable the unit from functioning when front cover is not properly closed, UL listed, Energy Star rated and Lifetime limited warranty.

Airflow, CADR and everything in between

Alen BreatheSmart Classic coverage
Purifying coverage
1100 sq. ft. (102 m2)
Alen BreatheSmart Classic airflow speed
Airflow speed
150-286 cfm (255-486 m3/h)
Alen BreatheSmart Classic fanspeed
Alen BreatheSmart Classic excellent purifying applicable can cover an estimated 1100 sq. ft. in under 2 hours. No doubt it can cover most ground including large living hall, lounge or playroom. Airflow distribution is punchy and consistent as well between 150-286 cfm.
Alen BreatheSmart Classic dust CADR
300 cfm (510 m3/h)
Alen BreatheSmart Classic pollen CADR
Pollen CADR
300 cfm (510 m3/h)
Alen BreatheSmart Classic smoke CADR
Smoke CADR
300 cfm (510 m3/h)
CADR is at an average of 300 cfm and based on the purifying coverage and airflow rate, there is more than enough juice to boost the 4 selectable fanspeed. For more detail airflow comparison, click on the compare button link above.

What’s inside count

Alen BreatheSmart Classic Pre-filter
Alen BreatheSmart Classic HEPA filter
HEPA-Pure Filter BF35
6 - 18 months
Alen BreatheSmart Classic technologies
^ Alen BreatheSmart Classic filters/ lifespan/ price
While Alen BreatheSmart Classic "only" comes with 3-stage filtration, it still rocks in filtering out common airborne pollutants at a reasonable time. Starting with the washable pre-filter that would trap large particles such as dust and pet hair while prolonging the HEPA filter lifespan. Depending on which HEPA filter you choose, the basic HEPA-Pure filter is great at filtering out common allergens without any deodorization capability. Optional filters upgrade includes mold, germs & asthma specialist HEPA-Silver, chemical, VOCs, smoke targeted HEPA-FreshPlus (recommended) and pet & diaper odor neutralizer HEPA-OdorCell. Last but not least the built-in ionizer would release negative ions and electrostatically merge unwanted particles causing them to drop to the floor.

Alen BreatheSmart Classic is covered against

Alen BreatheSmart Classic VS Dust



Alen BreatheSmart Classic VS Pollen



Alen BreatheSmart Classic VS Hair

Hair/ Pet hair


Alen BreatheSmart Classic VS Dust mite

Dust mites


Alen BreatheSmart Classic VS Mold/ Mildew

Mold/ Mildew


Alen BreatheSmart Classic VS Pet dander

Pet dander


Alen BreatheSmart Classic VS Virus/ Germ

Virus/ Germ


Alen BreatheSmart Classic 3-stage filtration is vastly efficient when pit against large and tiny pollutants, allergens, irritants, viruses and bacteria. Powered by immense 150-286 cfm airflow input/ output and wide 1100 sq. ft. purifying coverage, Alen BreatheSmart Classic combined Pre-filter HEPA-Pure Filter BF35 filtration is terrific in eliminating dust, hair, pet hair, pet dander, dust mites, pollen, mold and mildew.  An optional upgrade filter is required so Alen BreatheSmart Classic can correctly handle chemicals, odors, cooking smell, fire, VOCs, tobacco smokes, cigarette, vapor, radon and ammonia.

Keep it down

Alen BreatheSmart Classic noise level
Noise level
42 - 56 dB
Alen BreatheSmart Classic power consumption
Power consumption
64 - 105 W
Alen BreatheSmart Classic 42 - 56 dB noise level is standard in its class although on paper its slightly more quiet on the whole. Auto mode is great in controlling the noise level while not so great in bedroom air purifier if you are planning to operate it constantly at max speed. Power consumption is between 64 - 105 W; slightly higher than we would hope although the figures would varies depending on the fanspeed you are constantly in.

At what cost

Alen BreatheSmart Classic annual filter replacement cost
Annual Filter Cost
+- 46 - 138
^ Alen BreatheSmart Classic replacement filters estimated cost
Alen BreatheSmart Classic is not a cheap air purifier as with most air purifier in this category. The cost could even go higher if you opt for different front panel design and filter upgrade though we would recommend doing on the latter. What's standout in Alen BreatheSmart Classic is the annual filter replacement cost which is considerably cheap and with only 1 filter needed to be replaced. On normal use the filter should last between 12 - 18 months, perfect time frame to stock up via its official website or Amazon.

The challengers

Alen BreatheSmart FIT50

Slightly smaller version with similarity in design and swappable front panel. Purifying coverage is only up to 900 sq ft.

Alen BreatheSmart FLEX

The smallest version with cheaper price tag however purifying coverage is only up to 700 sq ft. Again similar design and setup with plenty of front panel to go for.
Rabbit Air MinusA2 SPA-700A

Rabbit Air MinusA2 SPA-700A

Thinner and lighter frame size air purifier with 6-stage filtration that also comes with changeable cover. Coverage wise its on the same par with BreatheSmart.

In conclusion......

  • Plenty of swappable wood trim front cover design.
  • Wide purifying coverage, superior airflow delivery rate and highly adjustable (up to 4 speed).
  • Up to 3 optional filter upgrade to choose from depending on your needs.
  • Ionizer could be turn on or off.
  • Longer lasting filters (up to 18 months) depending on usage volume/ air quality.
  • Accurate Smart Filter Light replacement indicator that calculates based on usage/ fanspeed/ environment.
  • Abundance of features - SmartSensor (air quality sensor), auto mode, filter life timer, pre-set timer.
  • Child friendly machine with locking control panel and safe vent guard.
  • Alen unique Lifetime Limited Warranty.
  • Lacks odor filtration on bundled HEPA-Pure filter (Optional filter upgrade required).
  • No dedicated odor carbon filter which could come in handy as filter replacement can be done separately.
  • Noisy at highest speed nevertheless Auto mode does come to rescue.
Build quality
Airflow delivery
Particle Filtration
Smoke Filtration

More on Alen BreatheSmart customizable

Built with significant plastic housing, Alen BreatheSmart customizable air purifier is large and tall though not the bulkiest in its class. The omission of casters makes sense as it is not the heaviest at only 21 lb. You could easily carry it around with the built-in handle. Plenty of indicator lights with round touch buttons located at the top panel, abundant of air intake and outtake surrounding side/ top of the air purifier. Filters are easily changeable via the front magnetic cover. The most fantastic part of this air purifier is the available designer panels cover option that we could personalize (check out Dark Espresso Wood Grain) similar to how we change our cellphone cover. On the whole Alen BreatheSmart customizable air cleaner design is clean, nicely executed yet easy to use.

Applicable area, airflow, noise level and power input

One of the strongest point of Alen BreatheSmart customizable HEPA air purifier. With the release of 2 air changes per hour, the air purifier can effectively cover a maximum of 102 m2 or 1100 sq. ft. in removing particles down to 0.3 microns. Parallel to the Airflow delivery strength, Alen BreatheSmart customizable has a highly impressive and consistent airflow delivery rate. Powered by WhisperMax technology, the noise level of the air purifier is reduced to 41.5 dB and 56 dB vary on the airflow speed. Inevitably, the power input level is rather high as to accommodate the strong airflow output, between 64 watts minimum to 105 watts maximum.

Final thoughts on Alen BreatheSmart customizable

There is no question on the capabilities of Alen BreatheSmart customizable HEPA air purifier but ask yourself, what is the purpose of purchasing an air purifier? Do you really need to spend that much on a top notch air purifier? If the answer is YES, what we have here is an air purifier that not only large in size, but large in features and performance. Best of all, Alen BreatheSmart customizable is not only customizable on exterior, but in interior (optional filters) as well.

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Frequently Asked Questions (FAQ)FAQ

Can I use Alen BreatheSmart Classic filters on BreatheSmart FIT50/ Flex?

BF35 filters can only be used in Alen BreatheSmart Classic and are not interchangeable with BreatheSmart FIT50/ Flex.

What is WhisperMax technology?

WhisperMax technology is a noise suppressor that help keeps the noise level down through precise tuning and aerodynamics. Only available in selected models.

Can Alen BreatheSmart Classic front panel be painted?

Alen BreatheSmart Classic (BreatheSmart series) front primer panel can be fully painted so you can have your own uniquely designed air purifier.

What is the differences between Alen BreatheSmart Classic, BreatheSmart Fit50 and BreatheSmart Flex?

  • Alen BreatheSmart is the highest range in its stable that has the best purifying coverage, CADR/ airflow follow by Alen BreatheSmart Fit50 and BreatheSmart Flex.
  • Alen BreatheSmart Fit50 surprisingly has the lowest noise level although it's hard to tell in real life situation.
  • Both Alen BreatheSmart and BreatheSmart Fit50 comes with WhisperMax technology and SmartSensor + Auto mode while BreatheSmart Flex have to do without.
  • Alen BreatheSmart Fit50 and BreatheSmart Flex also comes with Advanced Smart Filter Life that calculates filter lifespan based on usage/ environment while BreatheSmart Flex have to do with basic Filter Life that based on runtime.
For more details please refer to the comparison table below.
<< Swipe > on products to view more
Alen BreatheSmartAlen BreatheSmart Fit50Alen BreatheSmart Flex
Coverage1100 sq. ft. (102 m2)900 sq. ft. (84 m2)700 sq. ft. (65 m2)
CADR300 cfm (510 m3/h)220 cfm (374 m3/h)245 cfm (416 m3/h)
Airflow150-286 cfm (255-486 m3/h)110-231 cfm (187-392 m3/h)53-187 cfm (90-318 m3/h)
WhisperMax Technology
SmartSensor + Auto mode
Filter replacement indicatorSmart Filter LightSmart Filter LightFilter Light
Weight21 lb (9.5 kg)16 lb (7.3 kg)15 lb (6.8 kg)

How to tell apart which BreatheSmart do I owned?

Check the top black control panel, if you see only BreatheSmart logo in the panel, it’s the BreatheSmart Classic model. BreatheSmart Fit50 model would have its logo on the far right while BreatheSmart Flex model would have the word “Flex” next to BreatheSmart logo.

Alen BreatheSmart Classic indicator LED light is very bright. Is there a way to turn it off?

You can turn off indicator light by clicking on the power button when Alen BreatheSmart Classic is in operation.

Where is Alen BreatheSmart Classic air purifier made from?

Alen BreatheSmart Classic air purifier is made in China and developed in the United States.

What does Alen BreatheSmart Classic Lifetime Limited Warranty cover?

The Lifetime Limited Warranty cover your Alen BreatheSmart Classic air purifier from defects in materials or workmanship as long as you own it.
******** SIDE NOTE ********
  • Warranty will only be applicable if you are the unit original purchaser and in the US or Mexico.
  • Alen BreatheSmart Classic air purifier must be connected to a proper power supply (see voltage label). Using voltage converter, transformer or plug adapter will effectively void the warranty.
  • Shows no evidence of tampering, accidental damage, mishandling, modification or repair by anyone other than authorized Alen service personnel.
  • Replace the filter as stipulated timeframe in the manual to avoid excessive stress on the motor.
  • Remember to keep your proof of purchase and register your Alen BreatheSmart Classic air purifier at or call 1-800-630-2396 for warranty validation.

What is the differences between each Alen HEPA filters and which Alen BreatheSmart Classic replacement filter should I get?

All Alen BreatheSmart Classic filters are great at addressing dust, allergies and asthma. For a specific concern, choose:

  • HEPA-Pure - standard filter for household allergy relief.
  • HEPA-Silver - advanced all-around solution filter that is best against mold, germs & bacteria.
  • HEPA-Fresh/ HEPA-FreshPlus - chemical filter that is best against strong chemicals, smoke and VOCs.
  • HEPA-OdorCell - odor neutralizer that is best in removing diaper smell and pet odor.

What is the difference between Smart Filter Light and standard Filter Light?

Smart Filter Light calculates the filter lifespan based on actual usage and surrounding environment while standard Filter Light is purely based on runtime. Smart Filter Light is available in Alen BreatheSmart Classic and Fit50.

What is the differences between HEPA-Silver and HEPA-FreshPlus as both comes with activated carbon?

HEPA-Silver comes with 1.5 lbs activated carbon and is ideal against mold, germs & bacteria while HEPA-FreshPlus comes with higher 3 lbs activated carbon that is best against strong chemicals, smoke or VOCs.

How many filters Alen BreatheSmart Classic used?

Alen BreatheSmart Classic uses just one filter that is easy to replace if you discounted the washable pre-filter. You do have the option to choose from 1 of 4 customized filters that contains both HEPA and carbon filter materials.

Which is the best filter for paint, chemicals or formaldehyde fumes??

For chemicals such as VOCs or formaldehyde, choose either HEPA-Fresh that comes with 1.5 lbs activated carbon or the stronger HEPA-Fresh/ HEPA-FreshPlus that comes with 3 lbs activated carbon.

Which is the best filter to get rid of the smoke from wildfire/ wood burning?

For Alen BreatheSmart Classic, choose HEPA-Fresh or HEPA-FreshPlus (depends on model) would be the best option as it comprises 3 pounds of carbon pellets that is effective in absorbing chemicals component released from wood smoke.

Does Alen BreatheSmart Classic get rid of cigarette smoke?

Yes it does but you would have to upgrade the filter to either HEPA-Fresh or HEPA-FreshPlus (depends on model) that comes with thick layer of Activated Carbon.
******** SIDE NOTE ********
  • Alen BreatheSmart Classic will not remove residual smoke/ odors from wall paint, furniture, carpet and drapes.
  • Make sure Alen BreatheSmart Classic is used in the recommended room size or intended source.
  • Run on higher fan speed for maximum efficiency.
  • Avoid smoker from smoking indoor.

Which filter would work best to get rid of musty mold in a basement?

For Alen BreatheSmart Classic, opt for the HEPA Silver filter upgrade as it is designed to tackle mold, germ and bacteria in a basement. A dehumidifier would also be a great help in curbing down microorganism growth.

Which filter do I need to get rid of pet odors and litter box odors?

Yes it can but you have to opt for the HEPA-OdorCell filter upgrade that specialize in eliminating diaper and pet odors.

Which filter in Alen BreatheSmart Classic is best for just eliminating cooking smells in an open kitchen?

You could either opt for HEPA Silver Filter, HEPA FreshPlus or even HEPA-OdorCell filter to eliminate light cooking odors.

Is it possible to use more than 1 customizable filter at the same time?

You can only use one filter at a time in Alen BreatheSmart Classic. Please select the right filter that is best suited to your environment.

How do I reset Alen BreatheSmart Classic filter indicator after I have replaced it with a new filter?

You can reset the filter replacement indicator by holding the button down for about 5 seconds.

Where do I find Alen BreatheSmart Classic replacement filter?

You can find the replacement filter for Alen BreatheSmart Classic from their official website or at Amazon. Refer to the instructional booklet on the correct filter replacement code or through our product specification.

What is the function of SmartSensor with Auto-Mode?

SmartSensor is of course a sensor that detects the level of airborne particles in its surrounding and pass the information to the air purifier. Auto mode is a feature that automatically adjust the fan speed according to the information it received. Only air purifiers equipped with SmartSensor or equivalent sensor with have the Auto mode feature.

Is Alen BreatheSmart Classic air purifier wall mountable?

No Alen BreatheSmart Classic air purifier is not wall mountable.

Which filter does Alen BreatheSmart Classic comes with?

Alen BreatheSmart Classic comes with HEPA-Pure filter by default although user have the option to opt for different set of filter.

Is Alen BreatheSmart Classic's HEPA filter washable?

No Alen BreatheSmart Classic's HEPA filter is not washable as the water flow would damage the filter’s fiber. You should replace the filter instead according to the recommended lifespan or when the filter replacement indicator light lit up.

Can you use an extension cord on Alen BreatheSmart Classic air purifier?

Yes you can extension cord but make sure the cord is not damage in anyway or overloaded from too many connection that would short circuit and damage Alen BreatheSmart Classic air purifier.

Alen BreatheSmart Classic Troubleshooting

Safety Tips


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