BreatheSmart 45i

Alen

BreatheSmart 45i

38 positive 0 neutral 4 negative

Based on 42 Reddit mentions

What people are saying

Discover what users really think based on Reddit discussions.

Any recommendations on an air purifier that does what it supposed to do- removing harmful air pollutants?

Skip Levoit they’re Amazon junk owned by etekcity and a bunch of other Amazon-only no names. Air doctor is great, so is Alen. IMO Alen is the only actual BIFL purifier because you get a lifetime warranty for as long as you purchase authentic Alen filters (direct or retailers - just keep the receipt)

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ConBroMitch2247 in r/BuyItForLife

April 5, 2026 11:08 PM

13

I'd like to know who has a good, reliable air purifier!

Alen is excellent and built like a tank. Also literally BIFL as you get a lifetime warranty as long as you buy filters from them or an authorized 3rd party. Depending on your room size, 45i or 75i are great. (Remember the advertised sqft you see is often 1 air change per hour, if you want it to actu

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ConBroMitch2247 in r/BuyItForLife

April 23, 2025 6:49 PM

8

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

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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

Winix C545 Bearings (2021 Build Year)

Most under 200 dollar range purifiers just are not built to last long on general. I suggest checking the warranty before buying...and most...come with a 1 year warranty. Ive had units break within 6 months and a few more break a little over 1 year. Almost as if...they are made to just last a year or

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Person51389 in r/AirPurifiers

March 18, 2026 12:52 PM

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

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Person51389 in r/AirPurifiers

March 17, 2026 4:42 PM

3

Air Purifier Recommendations

Check out Alen. 45i or 75i. Just know that no purifier is going to do much about visible dust. Just the microscopic stuff.

ConBroMitch2247 in r/AirPurifiers

January 10, 2026 5:13 PM

3

Air purifier to address upper airway resistance during sleep?

Agree on Alen, it's the quietest unit I own. (I have the 45i, and like...8+purifiers plus many more I've tested.).

Person51389 in r/AirPurifiers

April 3, 2026 2:01 AM

2

Air purifier to address upper airway resistance during sleep?

I run my Alen on high. It's still very quiet. Is it not prudent to not comment a lot on a unit we don't have much first hand knowledge on, yes ? Alens have a lifetime warranty. Quiet, + energy efficient. And great for odors+VOCs. I don't know (any ?) other brands units that offer a lifetime warranty

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Person51389 in r/AirPurifiers

April 3, 2026 10:32 AM

2

Please help me find an air purifier for my issues.

For VOC's + odors Austin Air is very good but you would need to pay about 750 (they might have a cheaper one ?). That's one of the best, and probably worth it for your health imo. As you aren't even sure what your triggers are possibly, you want to get something very good. So those have a very large

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Person51389 in r/AirPurifiers

March 21, 2026 5:07 PM

2

Top alternatives in Air Purifiers

#1
Core 300

Levoit

Core 300

$84.99

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