Alen

35i

17 positive 2 neutral 4 negative

Based on 23 Reddit mentions

$279.99

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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.

Filtered by featurenoise levelClear feature

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

Looking for a high quality recommendation for an office

Alen 35i might be a solid choice for you. They are quiet

NumerousAssumption47 in r/AirPurifiers

February 1, 2026 12:46 AM

1

looking for air purifier for ~110 sq. ft. (dorm) room, mostly concerned with spread of viruses/bacteria

I think alen air would suit you.. you have the budget for it.. specifically, alen breathsmart 35i - it’s expensive but quiet.. has good carbon for vocs should you need it.. lifetime warranty so it can grow with you.. much more cadr than you need for the room, so you dont have to run it on high.. aga

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JamezDare in r/AirPurifiers

February 14, 2026 8:51 AM

1

looking for air purifier for ~110 sq. ft. (dorm) room, mostly concerned with spread of viruses/bacteria

I did a quick spec check sound wise for the 2 models in question - alen 35i is 42db at max and the airmega you mentioned is 53db at max I recall that db scale isnt linear and 10db means double the level of noise..

JamezDare in r/AirPurifiers

February 14, 2026 10:19 AM

1

Stay Away From Mila Air...

This is frustrating although it seems a little harsh as to Mila Air though imo. As most purifers break eventually, and the industry standard is pretty much just a 1 year warranty for most cheap/random brands. A lot of units will fail within 5ish years if used heavily probably, and I had many random

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Person51389 in r/AirPurifiers

June 11, 2026 5:11 PM

1

Bedroom air purifier recommendations

Have you considered an Alen 25 or 35i? I love my 25i for my office. Its auto light feature is perfect for night time and it’s the quietest air purifier I’ve ever had.

NumerousAssumption47 in r/AirPurifiers

January 6, 2026 5:29 AM

1

Air purifier for hospice patient

Alen 35i Does a nice job and extremely quiet. I also have Levoit 400S. They are both great. Alen is more sensitive then the 400S.

alpine_4 in r/AirPurifiers

January 13, 2026 5:21 AM

1

Air purifier for 10x12 nursery

I have the Alen 25i in my office and would also be great for a small nursery. Only 40 db at its highest setting which is great for babies since you want to keep it under 50 db. I also really like how it sounds. A 35i or flex would also be a great choice. I like the flex because it’s a 45i without al

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NumerousAssumption47 in r/AirPurifiers

January 23, 2026 3:49 AM

1

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