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 featureodor controlClear feature

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

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Person51389 in r/AirPurifiers

March 17, 2026 4:42 PM

3

Anyone with experience with alen air purifiers.

I've wanted Alen for years. Got the 75i and 35i. 35i was fine, but not that impressed with odor removal and I have the ultimate filter. Small kitchen and if I cook a burger, the smell is still there in the morning-even on turbo. 75i makes a knocking sound even on the lowest speed and that is right o

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blues2u in r/AirPurifiers

June 2, 2026 2:47 AM

2

Looking for plain HEPA filter to reduce cigarette smoke content, no ionizer options please!

HEPA purifiers reduce the particulate component of cigarette smoke, especially fine PM2.5 and even a portion of ultrafine particles, but they don’t eliminate gaseous toxins or all odors. You would need plenty of sorbent media for the latter. You could try a Levoit Vital 200S-P, it’s $20 cheaper at V

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xPurplexAnarchyx in r/AirPurifiers

March 31, 2026 7:08 PM

2

Need a filter for odors please deadly allergic

The ventilator is a good idea as someone else suggested, as no purifier under 200ish bucks will do much for odors. A good unit for odors is an Alen45i, but it's 350 bucks. An Alen 35i I think is 290. One of the best is AustinAir and they are 750. So is suggest Austin Air, or maybe an Alen. For a ven

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Person51389 in r/AirPurifiers

March 13, 2026 12:00 AM

2

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

My first air purifier for my living room! Help!

Great...although I just noticed about your 12 feet cielings not being in the 400 sq. Ft...meaning it's really more than 400 for the calculations. In which case an Alen 75i would be an even better choice. Or perhaps one of the other more powerful units. If you do get the 45i make sure you let it run

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Person51389 in r/AirPurifiers

May 11, 2026 9:48 PM

1

Recommendation for small bedroom

Filters always come with new units. A good mid-range unit for odors is an Alen 45i, with their best filter. Although it's 350. (35i smaller one is 290 I think.). So they have good filters for odors/VOCs with carbon pellets that absorb odors. (Their filters are 60 normal, 90 for that one for odors/VO

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Person51389 in r/AirPurifiers

March 17, 2026 2:19 AM

1

Levoit or Coway - indoor housework & paint

The Alen 35i and the Levoit Core 400S are tailored to particulates removal. Your issue is with odors. 400 grams of activated carbon is very little. And if it's plain/chemically untreated, it may not get rid of odors entirely. Unfortunately if your budget is $300 and you don't have much physical spac

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sissasassafrastic in r/AirPurifiers

October 4, 2025 2:39 PM

1

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