Alen
BreatheSmart 45i
Based on 54 Reddit mentions
$449.00
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Most discussed features
Sentiment summary across the product areas Reddit users mention most.
Reddit mentions
Original Reddit posts and comments behind this analysis.
I’ll pay you $10 if you can recommend air purifiers and their placements for this ~2,500 square foot house!
If you’re dealing with dust, honestly I wouldn’t even look at a purifier yet. You need a vacuum upgrade. Dust particles are too heavy for any purifier to suck in from across the room. Check out r/vacuumcleaners. But Something corded and bagged (yeah old school) but it will make a monumental differen
...ConBroMitch2247 in r/AirPurifiers
April 18, 2026 3:59 AM
5
PC fan purifiers vs HEPA for allergies
Well whichever has higher CFM will be better for your allergies,.if both Hepa 13 + Merv 13. But that will also use more energy. So those are two opposing things. If your potential PC box has higher CFM then allen with Merv 13+ filters, then that might be better. But if you run it on low or medium to
...Person51389 in r/HouseFresh
May 17, 2026 7:38 AM
3
How long for new-filter smell to dissipate on the Coway Airmega ProX?
Yeah, I could get 2 x 45i for the same price as 1 x 75i at current sales, and the 2 x 45i would give me more CADR with less noise, since 2 x 45i at speed 1 gives a CADR half-way between speeds 2 & 3 with 1 x 75i (and better coverage, since I could put them at two different locations in my room). Spe
...theorist9 in r/HouseFresh
April 25, 2026 4:27 AM
3
ALEN Air purifier, filter replacement.
I'm sticking with Alen and their filters. I like the lifetime guarantee. I will watch what happens with this lawsuit though. FYI, it's only the 45i and flex that are being addressed in this class action suit, not sure what that means, but I would think they would include all models if they had teste
...FairManner1292 in r/AirPurifiers
March 21, 2026 7:53 PM
3
Anyone with experience with alen air purifiers.
I’m using Alen 45i and 35i in our home and they work great. we have 2 cats and these machines remove any pet and cooking odors. filter needs to be replaced once a year. Having an app makes it handy to check or change settings as needed, also has a schedule option. good machines for the money.
Opposite_Yard_1857 in r/AirPurifiers
March 24, 2026 12:28 AM
3
Looking for air purifier for cat smell
Purifiers under 200 wont do much for odors unfortunately. Or not for very long. You need thicker filters with black carbon pellets -these absorb odors. The normal white filters in most purifiers just capture particles. Does nothing for odors. Under 200 dollar units will fair chance have a thin carbo
...Person51389 in r/AirPurifiers
March 17, 2026 4:42 PM
3
What's the best air purifier you've tried for Pets? Any recommendations?
You need a multi level approach. I use the Alen breathsmart air purifier. I would highly recommend getting an enzyme cleaner. That’s been the real game changer for us. I use the Allersearch ADMS Anti-Allergen line. I have the spray, laundry detergent, and floor cleaner. It helps tremendously. I feed
...PsychologicalFix196 in r/moderatelygranolamoms
May 13, 2026 5:37 PM
2
Dyson Purifier Big+Quiet Formaldehyde for hayfever
Good brands with affordable units are Winix, Levoit, Coway, Alen, and many more. A Levoit Core 600 for instance is around 280 dollars and does 350 range CFM...almost double the Dyson for 1/4th the cost. Winix + Coway have great units too. (Coway used a fungicide/pesticide on the filters for antibact
...Person51389 in r/AirPurifiers
May 2, 2026 11:33 AM
2
My first air purifier for my living room! Help!
I would look into Alen 45i Flex, or units from Winix, Levoit, or Coway. Alens are quiet and good for both VOCs + particulates, with their best filters, and come with a lifetime warranty if you stay in the filter replacement program. (I think 90 bucks every 9 or 12 months, your choice.). However if y
...Person51389 in r/AirPurifiers
May 10, 2026 1:20 PM
2
Allergies bad … impulsively purchased this purifier
Right, so I don't know your budget, but I believe a CR Box with 400ish CFM would give you around 5 air changes per hour...for borderline excellent air. (4.8 is good, 6 is excellent.) So you want to try to get I believe around 400 or even 500 CFM if you want excellent. A 280 dollar Levoit Core 600 do
...Person51389 in r/AirPurifiers
April 28, 2026 3:41 PM
2