Alen 45i Air Purifier: Quiet, Powerful Air Purification for Large Spaces

Jay Martin: We had a room with some pet odor, and this machine was more effective than our Molekule. Easy to set up and run, and the filter refills last longer and are cheaper than the Molekule.

United States on Dec 06, 2023

Daryl JonesDaryl Jones: 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.

United States on Oct 12, 2023

Dmt: I thought I had sleep apnea because of snoring and difficulty breathing. I was visiting a relative who had this unit to control dog odors(4 of them) It ran so quiet and the house didn't smell, and my eyes didn't itch.
I bought this and after 2 days, my snoring subsided and my breathing became easier.
I was so impressed that I bought another unit.

United States on Jul 21, 2023

Jeremy ModjeskaJeremy Modjeska: 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...

United States on Jul 21, 2022

angela moise: Works like a charm. During pollen season, with windows open, I could see air quality indicator going red. Windows closed, in a couple of hours, the air quality indicator was blue. Bought the air purifier for a highly allergic dog to pollen, now the dog is scratching very little.

Canada on May 28, 2022

Rice-a-Roni: Bought this to help remove the MJ smoke and puppy excrement that my neighbors seem to forget about.

Thankfully, I don’t smell it in my room whilst I slumber. If it hits my nose in another room, I’ll drag it out of my room, close the other doors so it focuses on the smaller area and helps some. Either the people moved out, stopped smoking indoors, cleaned up after their animals, or this is working. Not sure for certain, but I’m not complaining.

It helps drown out noise, as it also functions as a white noise apparatus, though not advertised as such since many people like quiet. If someone doesn’t, then pop in some earplugs (Recommend Loop Pro +18dB on Amazon)

Regardless how much I vacuum, dust, wipe, clean, or wash stuff, it doesn’t seem to help, so I got this. During various points in the day the light changes color to indicate level of filth in the air (I don’t have animals but neighbors walk their dogs past my door, so when I open my door I’m sure dander has made its way in my residence. I noticed that it works harder when the heat is on. (Purchased in late Feb.) **Changing out the furnace filter more often helps the quality of air, and stops me...

United States on Apr 02, 2022

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.

Canada on Feb 21, 2022

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 operate

The machine has a vacuum-able pre-filter

The 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 time

The machine is good for 800 sq ft of space

The 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.

Canada on Dec 06, 2021

mavis: I use this product to clean the air of dust.
Have only used it for one day,as it just arrived.
So not sure how clean the air will be in a week.
Very satisfied with the noise and very handy to move around.
Thank you

Canada on Jan 17, 2021

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.

Germany on Dec 18, 2020