BreatheSmart 45i

Alen

BreatheSmart 45i

50 positive 0 neutral 4 negative

Based on 54 Reddit mentions

$449.00

Buy on Amazon

We may earn a small commission.

Most discussed features

Sentiment summary across the product areas Reddit users mention most.

Reddit mentions

Original Reddit posts and comments behind this analysis.

Filtered by featurenoise levelClear feature

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

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

...

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

...

Person51389 in r/AirPurifiers

March 17, 2026 4:42 PM

3

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

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

...

Person51389 in r/AirPurifiers

April 3, 2026 10:32 AM

2

Alen 45(or 75) Vs Allerair Med 1

Re: dust, this is frequently asked. Air purifiers aren't good at removing visible dust as it's large and heavy compared to something like PM10, PM2.5, or PM0.1. See the sticky post at the top of this subreddit and our FAQs wiki page entries: I need an air purifier for dust. What should I buy? Why is

...

sissasassafrastic in r/AirPurifiers

August 12, 2025 6:56 PM

2

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

My first air purifier for my living room! Help!

Thank you so much. This is incredibly helpful and incredibly thorough. It sounds like alen 45i is a good option, but then which specific units from Winix, Levoit, or Coway would you recommend? I'm kind of overwhelmed by the amount of choice! I definitely want quieter, but I could give up VOC efficie

...

JellyNegative5946 in r/AirPurifiers

May 10, 2026 11:21 PM

1

Top alternatives in Air Purifiers

#1