BreatheSmart 45i

$429
BreatheSmart 45i
$429
$429

BreatheSmart 45i

$429.00

Purifies air up to 1,600 sq ft every hour or 800 sq ft every thirty minutes.

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BreatheSmart 45i

BreatheSmart 45i

Regular price $429.00
Sale price $429.00
Regular price
Sale Sold out HSA|FSA Eligible ? *One-time purchase only

Purifies air up to 1,600 sq ft every hour or 800 sq ft every thirty minutes.

1 - Customize Your Style
2 -Select Filter Not sure? Take our quiz

Pure Filter: Medical-grade HEPA Filter.

Good For: Capturing allergens, dust, mold. (B4-Pure)

3 - Filter Subscription

How subscriptions work? How subscriptions work
Filters are automatically delivered on your schedule. No obligation, modify or cancel your subscription anytime.

Filter Subscription

$62.10 $69.00

Save 10%

Next payment on:

12-21-2025

Delivery every:

Just the one included filter

Purifier includes filter rated for:

9-12 months

In an independent SleepScore study, 100 percent of participants said they’d recommend Alen® BreatheSmart 45i and that they planned to continue to use it. With laser sensor automation, and pink noise for a healthier and more relaxing vibe, the 45i is your secret weapon for a more restful night’s sleep.

Estimated Delivery: Fri, 28th Mar

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The Alen BreatheSmart 45i is the ultimate solution for tackling air quality concerns in large spaces. Here's why it stands out:

Advanced Filtration: True HEPA H13 filter captures 99.99% of airborne particles as small as 0.1 microns with a 245 cfm CADR Rating.

Ideal for your concerns: Perfect for medium rooms (1600sq/ft) with allergies, asthma, smoke, and odor concerns.

Quiet Operation: Powerful yet whisper-quiet at 49 db maximum noise for non disturbance sleep.

Smart Features: Color-coded air quality indicator. Control and monitor anywhere using your Alen App.

Customizable Design: Sleek look with customizable panels to fit any décor.

CADR i Clean Air Delivery Rate

245

CFM i Cubic Feet per Minute

Speed 1: 70 CFM | Speed 2: 135 CFM | Speed 3: 175 CFM | Speed 4: 215 CFM

Coverage

Up to 1,600 sq ft (148.6 m2) | Cleans all air in room in 1 hour and 800 sq ft every 30 minutes @ highest setting

Dimensions

H 25" (63.50 cm) x W 15" (38.10 cm) x D 8.5" (21.59 cm)

Energy star i Products/Homes/Buildings that earn the ENERGY STAR prevent greenhouse gas emissions by meeting strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy

Yes

Filter cost

$69 | Using "Pure" Air Filter

Filter life max

12 months | @ Recommended 24hr/day operation

Filtration rate

Removes 99.9% of particles greater than 0.1 microns

Noise level

Lowest Speed 23 dBa | Highest Speed 49 dBa

Ozone

0 PPM when disengaged, less than 0.001 PPM with optional ionizer engaged

Power consumption

1.1 to 50 watts

Power supply

120 AV, 60HZ (2 Prong Power Cord)

Sensor

Automatic speed adjustment and coordinated to 5 color rings/ 4 speeds

Sound type

Pink Noise | All speeds

Speed settings

4

Warranty

Forever Guarantee | with Product Registration & Active Air Filter Subscription

Weight

15 lbs (6.8 kg)

  • BreatheSmart 45i air purifier 
  • 45i HEPA air filter
  • Designer panel (optional)
  • Quick start guide

FAST, Free Shipping. Alen offers free FedEx ground shipping within the Continental US. Additional shipping costs apply to Alaska, Hawaii, and Puerto Rico. For available options, add items to your cart and enter shipping details. Continental US orders typically arrive in 2-5 business days, while shipments to other locations may take 7-10 business days. Shipping times may be longer during peak seasons. Learn more.

60 Days to Love It or Return It. Try our Alen Air Purifiers and see for yourself why our customers are raving about them! And the best part, we offer a 60 Days Love It, or Return It guarantee. We are so confident you are going to love our air purifiers, we'll give you 60 days to try them out! Learn more. 

Alen offers the industry's first and only Forever Guarantee to ensure your purifier provides Pure Air for Life. To maintain this guarantee, customers must register the product and either subscribe to an air filter replacement plan or provide proof of annual filter purchases. If an issue arises and can't be resolved by troubleshooting, Alen will replace the unit free of charge​​​. Learn more.

What is the Alen filter capturing?

Pure

HEPA

Just regular old dust contains a plethora of irritants that can cause inflammation, increase allergy symptoms, and leave you feeling less than your best. Alen captures 99.9% of those irritants (even the really tiny ones).

We capture 99% of:

  • Bacteria Bacteria
  • Dead Skin Dead Skin
  • Dust Mites Dust Mites
  • Soil Soil
  • Pet Dander Pet Dander
  • Dead Insects Dead Insects
  • Pollen Pollen
  • Hair Hair
  • Fibers Fibers

Perfect for:

  • Pet Owners
  • Allergy Relief
  • Capturing Mold Spores
  • Airborne Particles
Still unsure? Take our quiz

Fresh

HEPA + Carbon

Protection Against Chemicals, VOCs, Smoke. Reduce common household dust. Specifically crafted to neutralize and eliminate kitchen and household odors.

Everything that Pure captures, plus:

  • Cooking Odor Cooking Odor
  • VOC VOC
  • Pet Odor Pet Odor
  • Diaper Odor Diaper Odor
  • Garbage Odor Garbage Odor
  • Cigar Smoke Cigar Smoke

Perfect for:

  • Airborne Particles
Still unsure? Take our quiz

Odor

HEPA + Odor neutralizer

Conquer Pet Odors & Pet Dander with Ease. Destroys odors not just on the surface, but at the molecular level. Targets and absorbs stubborn pet odors, even urine and fecal odors. Specifically formulated to target and neutralize pet, diaper, and stubborn household odors.

Everything that Pure captures, plus:

  • Cooking Odor Cooking Odor
  • Diaper Odor Diaper Odor
  • Pet Odor Pet Odor
  • Garbage Odor Garbage Odor

Perfect for:

  • Airborne Particles
Still unsure? Take our quiz

VOC/Smoke

HEPA + Extra Carbon

Protection Against Chemicals, VOCs, Smoke. Captures 99.9% of harmful particles, including VOCs and chemicals. With over 2.3 lbs. of activated carbon, it absorbs strong odors and smoke. Specially designed to tackle smoke-related pollutants and odors.

Everything that Pure captures, plus:

  • Cigar Smoke Cigar Smoke
  • VOC VOC
  • Wildfire Smoke Wildfire Smoke
  • Chemicals Chemicals
  • Carbon Monoxide Carbon Monoxide
  • Soot Soot

Perfect for:

  • Airborne Particles
Still unsure? Take our quiz

PERFECT FOR MEDIUM ROOMS UP TO 1,400 SQ FT

BreatheSmart FLEX Coverage

Designed for bedrooms, offices, and other medium-sized spaces, the Alen FLEX efficiently purifies 700 sq ft - 1,400 every 60 minutes on high speed. Its compact size, quiet performance, and customizable panels make it a seamless addition to any room.

Perfect for medium/small rooms up to 1,600 sq ft

BreatheSmart 45i Coverage

Perfect for purifying large spaces including living rooms, kitchens and master bedrooms up to 1,600 sq ft. This powerful yet whisper-quiet air purifier ensures every corner of your room is filled with clean, fresh air.

Perfect for large rooms up to 2,800 sq ft

BreatheSmart 75i Coverage

Perfect for purifying large spaces including living rooms, kitchens and master bedrooms up to 2,800 sq ft. This powerful yet whisper-quiet air purifier ensures every corner of your room is filled with clean, fresh air.

Perfect for medium/small rooms up to 1,000 sq ft

BreatheSmart 35i Coverage

Perfect for purifying small spaces up to 1,000 sq ft @ one hour and 500 sq ft every 30 minutes. Power-packed BreatheSmart 35i: our most compact, most affordable smart purifier yet.

Compare models

Not sure which model is right for you?Take the quiz
BreatheSmart 75i

BreatheSmart 75i

Ideal for large living rooms and open-concept spaces
Coverage
1,400 to 2,800 sq ft
App Controlled
Yes
Compatible filter types

Pure - best for allergens
Fresh - best for smoke & harmful chemicals
Odor - best for neutralizing household odors

What’s Included?
  • BreatheSmart 75i air purifier
  • HEPA filter (options with carbon also available)
  • White panel (designer panels available for purchase)
  • Quick start guide
BreatheSmart 45i

BreatheSmart 45i

Standard living rooms and large master bedrooms
Coverage
800 to 1,600 sq ft
App Controlled
Yes
Compatible filter types

Pure - best for allergens
Fresh - best for wildfire smoke & harmful chemicals
Odor - best for neutralizing odors
VOC/Smoke filter - best for gasses from smoke & harmful chemicals

What’s Included?
  • BreatheSmart 45i air purifier
  • HEPA filter (options with carbon also available)
  • White panel (designer panels available for purchase)
  • Quick start guide
BreatheSmart FLEX

BreatheSmart FLEX

Children’s bedrooms, home offices, FLEXible spaces
Coverage
700 to 1,400 sq ft
App Controlled
No
Compatible filter types

Pure - best for allergens
Fresh - best for wildfire smoke & harmful chemicals
Odor - best for neutralizing odors
VOC/Smoke filter - best for gasses from smoke & harmful chemicals

What’s Included?
  • BreatheSmart FLEX air purifier
  • HEPA filter (options with carbon also available)
  • White panel (designer panels available for purchase)
  • Quick start guide
BreatheSmart 35i

BreatheSmart 35i

Big power for small spaces, at the best value.
Coverage
500 to 1,000 sq ft
App Controlled
Yes
Compatible filter types

Pure - best for allergens
Fresh - best for smoke & harmful chemicals

What’s Included?
  • BreatheSmart 35i air purifier
  • 35i HEPA air filter
  • Quick start guide
T500

T500

Compact, Powerful Air Cleaning for Any Room
Coverage
Up to 500 sq ft coverage at a one hour air exchange*
App Controlled
No
Compatible filter types

Pure - best for allergens

What’s Included?
  • T500 air purifier
  • True HEPA-Pure air filter
  • Quick start guide
  • Owner's Manual

Stay Connected With Your Alen App

Smart Connect Alen App

Detailed Control: Adjust settings across multiple devices and create schedules that match your routine.

Over-the-Air (OTA) firmware updates: As Alen launches ongoing enhancements, you will be able to update your purifier via the Alen Air app.

FAQs

What makes the BreatheSmart 45i different from other air purifiers?

The Alen BreatheSmart 45i combines advanced HEPA filtration technology with optimized airflow for maximum efficiency and minimal noise. This allows for whisper-quiet removal of particulate matter, even on the highest setting, 24/7.

What is included with the BreatheSmart 45i purchase?

The BreatheSmart 45i package includes the air purifier unit, a pre-installed filter, and a user manual. Additional filters can be purchased separately.

Does the BreatheSmart 45i come with a warranty?

Yes, the 45i comes with Alen's Forever Guarantee. This lifetime warranty covers any manufacturing defects when you maintain an active filter subscription service. If your purifier ever has issues, Alen will fix or replace it for free.

How can I trust the Alen brand?

We are committed to transparency and customer satisfaction. You can find over 5,000 reviews on our website and third-party platforms that attest to the quality and reliability of our products.

How does the 45i compare to other brands?

The BreatheSmart 45i offers superior performance with advanced HEPA filtration, quieter operation, and the Forever Guarantee, which many competitors do not offer.

How large of an area can the BreatheSmart 45i cover?

The BreatheSmart 45i is designed to purify spaces up to 1,600 sq ft, making it ideal for living rooms, open-concept spaces, and medium rooms.

How does the BreatheSmart 45i improve sleep quality?

The 45i is engineered to emit a soothing pink noise, which promotes better sleep by masking disruptive sounds. It has been shown to improve sleep quality in a peer-reviewed study by SleepScore Labs.

What types of filters are available for the 45i?

The BreatheSmart 45i has four filter options: Pure (for allergens), Fresh (for chemical odors), Odor (for smoke and pet odors), and VOC/Smoke (for tough odors). All filters are interchangeable, so you can switch based on your needs.

What are the noise levels of the BreatheSmart 45i?

The 45i operates at whisper-quiet levels, even on the highest fan setting. The pink noise it generates is calming and helps create a peaceful environment.

Can I control the 45i remotely?

Yes, the 45i can be controlled remotely using the Alen Air app. You can monitor air quality and adjust settings from anywhere.

What’s included with my purchase of the BreatheSmart 45i?

The 45i comes with the air purifier unit, one pre-installed filter, and a user manual. Additional filters can be purchased separately. The app is available for Apple iPhones and Android.

How energy-efficient is the BreatheSmart 45i?

The 45i is designed to be energy efficient, consuming minimal electricity while maintaining high purification performance.

Can I leave the 45i running all the time?

Yes, the BreatheSmart 45i is designed for continuous operation. Running it 24/7 ensures optimal air quality in your space.

Does the 45i help with wildfire smoke?

Absolutely. The 45i with a VOC/Smoke filter captures fine smoke particles, making it ideal for areas affected by wildfires.

What is the power consumption of the BreatheSmart 45i?

The 45i consumes 50 watts on the highest setting, which is energy efficient given its high air purification power. It’s designed for continuous operation.

Does the BreatheSmart 45i help reduce odors and smoke?

Yes, with the Odor and VOC/Smoke filters, the 45i effectively removes odors from cooking, pets, and smoke. These filters neutralize airborne particles that cause unpleasant smells.

How does the BreatheSmart 45i help with allergies?

The 45i's HEPA filtration captures 99.99% of airborne particles down to 0.1 microns, effectively removing allergens like dust, pollen, and pet dander.

How often should I replace the filter?

Alen recommends replacing filters every 9-12 months, depending on usage and environmental factors. The Alen Air app can remind you when it’s time for a change.

Is the 45i safe for use around pets and children?

Yes, the 45i is safe for use around pets and children. Its design includes safety features like a child lock, and its quiet operation ensures it won't disturb your pets or sleeping children.

What does the red light around the power button mean?

The red light indicates poor air quality, as detected by the 45i's air quality sensor. It automatically adjusts fan speed to clean the air faster.
Reviews
Q&A
N
Nikeland C.
5.0 star rating
02/22/25
A Sleek and Efficient Home Essential
Review by Nikeland C. on 22 Feb 2025 review stating A Sleek and Efficient Home Essential
I’ve been using the Alen BreatheSmart 45i for about a month now, and I have to say—it’s an absolute game-changer when it comes to air purification. From its sleek and refined design to its impressive performance, this purifier checks all the right boxes for me.

Design & Customization
One of the standout features of the Alen BreatheSmart 45i is its aesthetic appeal. Unlike bulky, industrial-looking air purifiers, this one is designed to fit seamlessly into any home decor. What I love even more is the interchangeable panel design, allowing you to choose a finish that complements your space. Whether you want a modern or classic look, Alen gives you options.

Performance & Efficiency
This purifier isn’t just about looks—it delivers powerful air-cleaning performance. It can clean up to 1,600 square feet of air per hour, which is incredible for maintaining a fresh and healthy home environment. Despite its efficiency, it operates quietly, making it perfect for bedrooms, living areas, or even home offices without being disruptive.

Smart Features & App Integration
Another feature I love is the smart app control. The app is user-friendly and highly efficient, allowing me to control the purifier remotely—a fantastic option when I’m away from home but still want to maintain air quality. Having the ability to adjust settings, monitor air quality, and turn the unit on or off from anywhere adds a whole new level of convenience.

Final Thoughts
The Alen BreatheSmart 45i is an air purifier that not only performs exceptionally well but also blends beautifully into any home. It’s powerful, whisper-quiet, and smartly designed, making it a fantastic investment for anyone looking to improve their indoor air quality. If you want style, efficiency, and smart features all in one, this is definitely worth considering!
N
Nikeland C.
5.0 star rating
02/22/25
A Sleek and Efficient Home Essential
Review by Nikeland C. on 22 Feb 2025 review stating A Sleek and Efficient Home Essential
I’ve been using the Alen BreatheSmart 45i for about a month now, and I have to say—it’s an absolute game-changer when it comes to air purification. From its sleek and refined design to its impressive performance, this purifier checks all the right boxes for me.

Design & Customization
One of the standout features of the Alen BreatheSmart 45i is its aesthetic appeal. Unlike bulky, industrial-looking air purifiers, this one is designed to fit seamlessly into any home decor. What I love even more is the interchangeable panel design, allowing you to choose a finish that complements your space. Whether you want a modern or classic look, Alen gives you options.

Performance & Efficiency
This purifier isn’t just about looks—it delivers powerful air-cleaning performance. It can clean up to 1,600 square feet of air per hour, which is incredible for maintaining a fresh and healthy home environment. Despite its efficiency, it operates quietly, making it perfect for bedrooms, living areas, or even home offices without being disruptive.

Smart Features & App Integration
Another feature I love is the smart app control. The app is user-friendly and highly efficient, allowing me to control the purifier remotely—a fantastic option when I’m away from home but still want to maintain air quality. Having the ability to adjust settings, monitor air quality, and turn the unit on or off from anywhere adds a whole new level of convenience.

Final Thoughts
The Alen BreatheSmart 45i is an air purifier that not only performs exceptionally well but also blends beautifully into any home. It’s powerful, whisper-quiet, and smartly designed, making it a fantastic investment for anyone looking to improve their indoor air quality. If you want style, efficiency, and smart features all in one, this is definitely worth considering!
N
Nikeland C.
5.0 star rating
02/22/25
A Sleek and Efficient Home Essential
Review by Nikeland C. on 22 Feb 2025 review stating A Sleek and Efficient Home Essential
I’ve been using the Alen BreatheSmart 45i for about a month now, and I have to say—it’s an absolute game-changer when it comes to air purification. From its sleek and refined design to its impressive performance, this purifier checks all the right boxes for me.

Design & Customization
One of the standout features of the Alen BreatheSmart 45i is its aesthetic appeal. Unlike bulky, industrial-looking air purifiers, this one is designed to fit seamlessly into any home decor. What I love even more is the interchangeable panel design, allowing you to choose a finish that complements your space. Whether you want a modern or classic look, Alen gives you options.

Performance & Efficiency
This purifier isn’t just about looks—it delivers powerful air-cleaning performance. It can clean up to 1,600 square feet of air per hour, which is incredible for maintaining a fresh and healthy home environment. Despite its efficiency, it operates quietly, making it perfect for bedrooms, living areas, or even home offices without being disruptive.

Smart Features & App Integration
Another feature I love is the smart app control. The app is user-friendly and highly efficient, allowing me to control the purifier remotely—a fantastic option when I’m away from home but still want to maintain air quality. Having the ability to adjust settings, monitor air quality, and turn the unit on or off from anywhere adds a whole new level of convenience.

Final Thoughts
The Alen BreatheSmart 45i is an air purifier that not only performs exceptionally well but also blends beautifully into any home. It’s powerful, whisper-quiet, and smartly designed, making it a fantastic investment for anyone looking to improve their indoor air quality. If you want style, efficiency, and smart features all in one, this is definitely worth considering!
S
Shelly G.
Verified Buyer
5.0 star rating
12/11/23
Alen 45is are Pure Comfort!
Review by Shelly G. on 11 Dec 2023 review stating Alen 45is are Pure Comfort!
I have 2 Alen 45is. I love them for their ease of use, quietness, and air purification. I like the espresso color as well, which I ordered. The quality is easy to see. I would recommend the 45i for all the above reasons.
E
Elizabeth M.
Verified Buyer
5.0 star rating
10/13/23
Wonderful size for the bedroom,
Review by Elizabeth M. on 13 Oct 2023 review stating Wonderful size for the bedroom,
Wonderful size for the bedroom, we bought it to support our Alen75i during winter fireplace season and got the smoke filter… we are operating both in a large 60x80 25 year old cement block cabin. Before we bought them we had coughs and scratchy eyes and I dusted every day… now 6 months later the coughs and scratch eyes are gone, and dusting is only once a week. Just get one, the air you breathe is more important than the food you eat!!! I also found it interesting when they were harvesting peanuts 3 mikes away both units showed a red light, now harvesting is finished and they are back to green!!! Before I got this smaller unit my big unit never had a green light, now we know it needed the extra help keeping the air clean.
E
Elizabeth M.
Verified Buyer
5.0 star rating
10/13/23
Wonderful size for the bedroom,
Review by Elizabeth M. on 13 Oct 2023 review stating Wonderful size for the bedroom,
Wonderful size for the bedroom, we bought it to support our Alen75i during winter fireplace season and got the smoke filter… we are operating both in a large 60x80 25 year old cement block cabin. Before we bought them we had coughs and scratchy eyes and I dusted every day… now 6 months later the coughs and scratch eyes are gone, and dusting is only once a week. Just get one, the air you breathe is more important than the food you eat!!! I also found it interesting when they were harvesting peanuts 3 mikes away both units showed a red light, now harvesting is finished and they are back to green!!! Before I got this smaller unit my big unit never had a green light, now we know it needed the extra help keeping the air clean.
E
Elizabeth M.
Verified Buyer
5.0 star rating
10/13/23
Wonderful size for the bedroom,
Review by Elizabeth M. on 13 Oct 2023 review stating Wonderful size for the bedroom,
Wonderful size for the bedroom, we bought it to support our Alen75i during winter fireplace season and got the smoke filter… we are operating both in a large 60x80 25 year old cement block cabin. Before we bought them we had coughs and scratchy eyes and I dusted every day… now 6 months later the coughs and scratch eyes are gone, and dusting is only once a week. Just get one, the air you breathe is more important than the food you eat!!! I also found it interesting when they were harvesting peanuts 3 mikes away both units showed a red light, now harvesting is finished and they are back to green!!! Before I got this smaller unit my big unit never had a green light, now we know it needed the extra help keeping the air clean.
D
Darryl F.
Verified Buyer
5.0 star rating
09/30/23
Customer for Life
Review by Darryl F. on 30 Sep 2023 review stating Customer for Life
This is the 4th Alen Filter we have purchased. I love the “smart” feature - being able to monitor & control the filter operation on my smartphone from anywhere. Very quiet & effective!
A
Andrew S.
Verified Buyer
5.0 star rating
09/04/23
The decision to purchase this
Review by Andrew S. on 4 Sep 2023 review stating The decision to purchase this
The decision to purchase this air purifier has proven to be a sound one. After buying numerous purifiers in the past and being disappointed, I took immense delight in the purchase of the Alen brand. After one night’s performance in my bedroom, I awakened with a marvelous sense of wellness. My breathing was clear and with ease; the air quality within the room was superb. Moreover, the unit was relatively quiet, causing no disruption to my sleep. After a couple more days of usage I was so happy with my purchase that I ordered a second, larger unit for placement in my living room! Fun side note with regard to aesthetics: the handsome, minimalist design was also a winner in my eyes, blending seamlessly with the decor and not standing out like some invasive, putrid swamp-thing from God knows where! The Alen air purifiers are a marvelous standout in this segment. I strongly encourage everyone to consider patronizing this business—you will not be disappointed. Thanks so much, Alen! I’m a fan for life.
C
Charles G.
Verified Buyer
5.0 star rating
08/19/23
The Best Purifier
Review by Charles G. on 19 Aug 2023 review stating The Best Purifier
It has totally changed our sleep ! We had other brand of air purifier no comparison to the ALEN . The addition of life guarantee with auto filter order is the Best in the country .
J
Joan D.
Verified Buyer
5.0 star rating
07/19/23
Fabulous!!!
Review by Joan D. on 19 Jul 2023 review stating Fabulous!!!
Love it!!! Easy to use, extremely attractive & efficient! I have a grass pollen allergy which causes a cough & itchy skin! It helps tremendously!!! I bought a different model for the bedroom.
B
Balazs V.
Verified Buyer
5.0 star rating
07/02/23
Love it! Looking to purchase
Review by Balazs V. on 2 Jul 2023 review stating Love it! Looking to purchase
Love it! Looking to purchase another for the bedroom!
N
Nick G.
Verified Buyer
2.0 star rating
05/23/23
Loud
Review by Nick G. on 23 May 2023 review stating Loud
Significantly louder than advertised 49db at max fan speed even after switching from fresh to heavy smoke filter. 49db maybe at fan speed 2. Very disappointing. I have two 75i units which are and thought the 45i would be just as quiet.
Reviews
Q&A