Alen Air Purifier BreatheSmart 45i HEPA with Pure Filter for Large Rooms |1900 Sq. Ft.| Perfect for Bedrooms & Home Offices – Captures Dust + Pet Dander & Household Odors – White
Original price was: $449.00.$402.89Current price is: $402.89.
Price: $449.00 - $402.89
(as of Dec 02, 2025 12:39:18 UTC – Details)
Product description
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Alen 45i Video Merchant Video
1 Features
2 Coverage Area
3 Filter Options
4 Designer Panels
1 Allergies
2 Kitchen Odor
3 Wildfire Smoke
4 Sleep Better
5 Pet Odor
1 Micromanage your Air
2 Dashboard
3 Air Quality Insights
4 Notifications
1 Good Housekeeping
2 Press Reviews
COMPARISON CHART
Add to Cart
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Customer Reviews
4.8 out of 5 stars 738
4.4 out of 5 stars 47
4.5 out of 5 stars 1,104
4.6 out of 5 stars 3,281
Price
$431.32$431.32
$227.99$227.99
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Coverage Area
900 Square Feet
1,000 Square Feet
1,300 Square Feet
700 Square Feet
Ionizer Feature
✔
✔
✔
✘
Designer Color Panels
✔
✔
✘
✔
Smart Sensor & AQ Indicator
✔
✘
✔
✔
Maximum Power Consumption
45 Watts
40 Watts
45 Watts
45 Watts
Filter Life (Running 24/7)
9-12 Months
9-12 Months
12-15 Months
12-15 Months
Best Purifiers for Your Space
Big Bedrooms, Workshops
Play Rooms, Kitchens, Offices
Open Office Spaces, Basements
Open Office Spaces, Basements
HEPA Pure Filter: Eliminates 99.9% of pollutants as small as 0.1 micron so you can breathe easy. Perfect for bedrooms, living rooms and home offices
Sleep Enhancing: The BreatheSmart 45i is proven by SleepScore Labs to enhance sleep according to a peer study. Its ultra-quiet operation emits pink noise, optimizing lower octave frequencies, and ensuring a restful night
Efficient Coverage: The BreatheSmart 45i quietly and efficiently circulates air up to 1900 sq. ft. every hour. Perfect for large bedrooms, living rooms, and dining rooms ensuring clean, fresh air throughout your space
Engineered to Perform: Alen air purifiers offer superior performance through the combination of a powerful fan, quiet motor, and advanced filtration. Medical-grade filters capture particles as small as 0.1 micron
Intelligent Design: SmartSensor technology adjusts fan speed based on air quality, with color-coded feedback. Monitor air purity easily with this home essential
Customers say
Customers find the air purifier effective, noting it cleans a large amount of air within minutes and keeps dust and dander down. They appreciate its quiet operation, easy setup, and elegant design, with one customer mentioning it blends well with modern decor. Customers report improved breathing and reduced sneezing and coughing. While some customers consider it well worth the money, others find it pricey.
10 reviews for Alen Air Purifier BreatheSmart 45i HEPA with Pure Filter for Large Rooms |1900 Sq. Ft.| Perfect for Bedrooms & Home Offices – Captures Dust + Pet Dander & Household Odors – White
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Original price was: $449.00.$402.89Current price is: $402.89.
J. Kang –
Worth every cent, allergy relief almost immediately
We recently got a mini schnauzer puppy a couple of months ago. I am highly allergic to most dogs and all cats. Even though the schnauzer is considered hypoallergenic, I know that no dog is truly hypoallergenic. We have a small 880 foot condo and keep her crate in the living room. Starting on the first evening we had her, my allergies started to flare up, as well as my wife’s. This was not acceptable. I originally had a levoit large room purifier but knew it was time to step it up. After perusing Amazon reviews, I decided on the Alen Breathe smart i45. A major plus to this unit was the air sensor which automatically adjusts speed and intensity based upon air quality. When I first got it, I immediately plugged it in and it got to work. The air quality light showed red and it continued running at high intensity for several hours and I saw the air quality improving. After a day or two, my allergy symptoms were completely gone. I was ecstatic! This purifier is meant to run 24/7, so that is what I do. It is a LIFESAVER! Now we can co exist with our four legged friend in peace. Make sure to register on their site for the lifetime warranty activation. I also signed up for the filter subscription as it makes things easier than having to manually order. I would recommend this purifier to anyone who has allergies and/or wants better air quality! Can’t give this thing enough praise. Note: Few comments here recommend the gosund app for wifi monitoring. While I tried doing so and it did work, I quickly cancelled the connection and deleted the gosund app. I think it’s a security risk to give some unknown app your WiFi network password, and also when I contacted Alen, they said there is no app right now for monitoring purposes. The wifi capability is for remote troubleshooting if issues arise. So I recommend not using any third party app with the purifier.
Joshua Ranley –
Would recommend
This has kept out 1000 sq ft first floor nice and clean. It has been running nonstop for months without issue and has definitely reduced dust, smoke smell in the winter, and other odd smells when cooking. The charcoal filter helps the smells and the filter lasts a while
Jeremy Modjeska –
More sleeping, less sneezing
It was summer in Seattle and the blooming things were exploding with delight, unleashing a blanket of pollen on the city and providing job security for the makers of Sudafed. I’d grown weary of sneezing myself to sleep at night and of constantly vacuuming up dust. It was the summer I turned to air purification for my salvation.I bought the Alen 45i on the recommendation of Consumer Reports. After a few initial hours on turbo, it settled into a quiet cycle on auto mode and I haven’t had to touch it since. Pretty quickly, my dust level was significantly diminished and I was sleeping better. I found that when I walked downstairs in the morning I would immediately start sneezing, so I ended up purchasing the larger 75i for my living room (probably overkill for my space; it’s a gigantic beast). Both units are extremely quiet unless they’re on turbo — but they call it turbo for a reason — and they’re super-easy to setup and use. They also look nice, and I like that you can turn off the display light on the 45i so it doesn’t cast unnecessary light in the bedroom at night.So far so good on the filter, though I haven’t had it long enough to say whether it’s as long-lasting as claimed. Assuming it continues to perform I think it’s worth the investment for cleaner air and better sleep.
Brian K. –
Best purchase I’ve made in years!!!
I try not to write reviews until some time has passed and it’s been about 8 months since we purchased this and couldn’t be more happy.Initial Impression:The presentation was great with a creative front opening box which made it easy to pull out and no fuss of wedging it through the top like any large item. We got it all set up and set it to auto and took it for it’s first spin! It started off like any air purifier running a mod speed until it stated to room was clean… here is the fun part, our toddler had a smelly surprise for us! The moment I opened her diaper (20 feet away) this baby turned red and kicked into high gear. We were overly impressed! This thing was a fart snitch since day one lol. It always kicks on when we cook or the smog is bad (we live in LA) which is pretty often. It’s just nice to know we are breathing cleaner air inside.*Side note, we have a medically fragile child who has had a few heart surgeries and experienced a collapse lung so also has respiratory issues. She was noticeably better when we purchase this device.Warranty and a customer service:We recently had the sensor reading red aka dirty for a couple weeks straight. It was odd because we loved to San Diego which has much cleaner air and tested this in small isolated rooms showing the same issue. Upon contacting support they confirmed that some of the 45i units had an issue with a dirty sensor and would send a cleaning kit free of charge. We received the lot within a few days but it was still having the same issues. What did they do??? They offered us a free upgrade to a 75i!!! WHAT? This was by far the best warranty (at no additional cost) I’ve ever seen. The new unit arrived within a few days and here we are happy as can be with a fast/stronger device cleaning our home.Conclusion:I’m so happy with this purchase that I made this loooong review just to make sure any potential buyer knows it’s worth! Our medically fragile toddler sleeps so much better with this in our home and the same goes for my allergies. Definitely worth spending the extra money!
Daryl Jones –
Excellent air purifier
A great air purifier. Operation is quiet, no need to turn up the tv or move it out of a bedroom. Comparable with Gosund app so you can see your air quality from your Alexa app. The fan speed automatically adjusts according to the pollutant level in your home. This got a workout this year with all the wildfire smoke. I even brought it outside to briefly get measurements on outside air quality. I’ve had my Alen for 2 years and I’mvery satisfied with it. Filters are expensive but don’t need to be replaced very often.
Franz JC –
This is the 3rd unit I bought. It’s so sleek and it compliments your furnitures.
W. H. –
Habe das Gerät seit einem Tag im Betrieb und bin bisher begeistert. Der Alen BreatheSmart 45i macht einen sehr wertigen und robusten Eindruck, ähnlich wie ein Gerät aus der Medizintechnik. Der Luftdurchsatz durch den Filter ist bereits in der kleinsten Betriebsstufe, in der der Ventilator kaum zu hören ist, enorm hoch. Es ist ein sehr gut durchdachtes Gerät, die Inbetriebnahme und Bedienung sind einfach und intuitiv. Der Filter gab bei Inbetriebnahme keinen Geruch ab.Mir wurde zunächst irrtümlicherweise ein Gerät ausgeliefert, das für den Markt im UK bestimmt war und daher nicht den passenden Netzstecker für deutsche Schuko-Dosen hatte. Das Problem wurde sehr professionell, schnell und umstandslos von Alen International zu meiner vollkommenen Zufriedenheit gelöst.
Tonyzee –
I followed consumer report’s recommendation and went with the alen breathsmart machine. I have used it for 3 days and so far I am loving it!I have dust allergies and this does the trick. I sleep well and I dont have as bad of a plugged nose in the morning as before.The machine is simple to operateThe machine has a vacuum-able pre-filterThe machine has a life time warranty as long as you subscribe to the Alen filter replacement program within a year of purchase which is a BIG DEAL.The machine’s HEPA filter lasts 12 months.The machine is very quiet in the lowest settle and sounds like a white noise machine on the second lowest setting.The machine is very light. I move it from room to room all the timeThe machine is good for 800 sq ft of spaceThe machine is very nice to look at!One con is the manual sucks. Sometimes my machine has this wifi looking symbol on and I dont know what it does. The machine becomes possessed and starts cycling through fan speed and turns off on its own. It only happened once and I dont know whats going on.
Jürgen S. –
Das Gerät ist sauber verarbeitet, arbeitet recht leise und ist einfach bedienbar.Viel Plastik, sitzt aber trotzdem alles gut und wackelt nicht.Der Filter lässt sich gut tauschen und wirkt robust.Weitere Punkte zeigen sich vermutlich in den nächsten Monaten, bisher ein sehr guter Eindruck.Mir wurde zuerst das falsche Gerät zugesendet. Nach einer Rücksprache mit Alen UK (Verkäufer) haben die super reagiert, sich gut gekümmert und auch nachgefragt ob alles in Ordnung ist. Habe ich so noch nicht erlebt, dafür auch volle Punktzahl.
Paul L. –
Purchased two 45i units, on sale for $325.00 each, plus two B4-Fresh replacement filters for $93.00 each. Shipping was quick at 2 days, Only been using for a day, but very pleased so far with ease of operation, low noise even on the Turbo speed and the size. Also appreciate the long 6′ + power cord. I registered both units for extended warranty on Alen’s website, and got confirmation by email, but disappointed that the advertized “Forever Guarantee” doesn’t seem to be available in Canada, nor can you even order accessories, or replacement filters directly from Alen for delivery in Canada. Still unsure and confused on whether registering the products extends the warranty from 1 year to 5 years, as per Alen’s website, as website wouldn’t allow for a Canadian address. Alen’s Customer Service stated that they hope that delivery service and Forever Guarantee will be available in Canada soon.