Alen
BreatheSmart Flex
Based on 28 Reddit mentions
$349.00
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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.
Will an air purifier help with stale air in a poorly ventilated apartment?
First, I want to start by saying I feel your pain and wish you well. In a space that small, with your budget, I would say table/pedestal fans and paying close attention to cleaning are going to make a much bigger difference. I’m not saying you’re dirty or you don’t clean, but oils from cooking can b
...IDontLikeYourToan in r/AirPurifiers
July 12, 2026 4:54 PM
2
Recommendations for a purifier that will run 24/7
Just purchased a couple Alen Flex machines after loads of research. Didn't feel I needed all the bells and whistles that come with newer models. It is being phased out but uses the same filters as 45i, the lifetime warranty was a big plus.
Magic32101 in r/AirPurifiers
December 5, 2025 5:17 PM
3
Right now it’s 42 degrees and 40 mph winds and “feels like 26 degrees”. Is this the new normal for Chicago in January?
I got the Alen Breathesmart Flex with the Fresh filter that has the most activated carbon in it. I got this one because it has decent amount of activated carbon in its filter, it was aesthetically pleasing, and I could buy it with FSA money. The other models are more expensive and have things I don’
...let-chicago-prosper in r/AskChicago
January 10, 2026 3:34 PM
2
Best air purifier for allergies that'll actually last?
Alen 45i Flex, so Alen has a lifetime warranty if you stay in filter replacement program. One of the only brands in the industry with a lifetime warranty. It doesn't move air super-fast though, but slow and steady. Aldo I think 400-450 with the Flex being 50 cheaper with no smart features + no ioniz
...Person51389 in r/AirPurifiers
July 30, 2026 4:24 PM
1
Looking for a basic, no frills purifier
Alen 350i or 450i, the 450i Flex has no ionizer and no smart features, and is 50 dollars cheaper. The 350i might be big enough, definitely for smaller room. So they have more carbon in them than most hepa based units, if you get their best filter. However, VOC focused in will still have far, far mor
...Person51389 in r/AirPurifiers
August 9, 2026 7:17 PM
1
PSA - Alen Air Purifiers Use RFID/DRM to Block The Use of Third-Party Filters
Yes I have 3 Alen purifiers one 75i and flex and fit that are not software and strip rigged!!! And two that are and I am pissed about buying the two rigged with software and stripe! I do not register my machines and never will so you will not replace mine and I will not ask you to. I want to use fil
...SeaExcellent3145 in r/AirPurifiers
June 21, 2026 1:32 AM
1
Do any models <$300 mitigate smells at all?
Just spend another 50 bucks and you can get an Alen Flex. Or a RIA Breezeguard (370) Most normal air purifiers have white filters that filter dust + particles. Odor molecules are different so other methods will be used to capture odors. (I also use moisture bags + have a carbon filter behind box fan
...Person51389 in r/AirPurifiers
March 1, 2026 5:19 AM
1
Looking for the best air purifier I can pick up at a physical store. Ohio USA
Alen Air all the way. Tried just about every purifier sold From Target, Walmart, Kohls, Home Depot, Best Buy, Lowe’s, Menards… Almost all went back Shark used to be good, but their newer filters smelled like chemicals and they were super loud. Germ Guardian was ok, but quality dropped. Dyson is a jo
...IDontLikeYourToan in r/AirPurifiers
May 2, 2026 3:12 AM
1
Air Purifier for Odor Removal
Alen Flex is what I got primarily for odors, but it's around 350 range I think. But it has a lifetime warranty you will end up saving money probably as others will break after some years. (Lifetime warranty if you stay in the filter replacement program, you can do I think every 9 or 12 months, and t
...Person51389 in r/AirPurifiers
February 28, 2026 9:43 PM
1
I need help finding the right air purifier.
Yes, sleeping next to a litter box seems like a bad idea imo. OP I would also advise to move the litter box as far as possible, then put air purifier between you + the litter box so it sucks up that related air before it gets to you. Maybe even a partition of some sort could help angle air to keep i
...Person51389 in r/AirPurifiers
March 4, 2026 9:32 PM
1