25i

Alen

25i

7 positive 0 neutral 1 negative

Based on 8 Reddit mentions

$179.00

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.

How many air purifiers should I get for my apartment?

I just got an Alen Air 25i for my little office and it’s been a really great unit for the last few weeks. Alen sells bundle “whole house” solutions that might work for you. For me, I put a smart air blast in my living room, a iqair GCX in my kitchen, iqair gc in my dining room/front foyer, Alen 25i

...

NumerousAssumption47 in r/AirPurifiers

December 26, 2025 8:26 AM

8

Recommendation for small bedroom

Right so the germ guardians are not that great in terms of power, so they are just OK. The Levoit core 300 probably outperforms them. Although they have the UVC which is nice. But the weak uvc in such units means germs would need to pass through multiple times in order to kill or inactivate it. (Hel

...

Person51389 in r/AirPurifiers

March 20, 2026 1:17 PM

2

Is the consensus Coway Air Purifiers?

Considering the current Coway price tags, I prefer Alen. I have the Coway Airmega 400S and 300S and then recently got the Alen 25i for my small office. Alen hands down has the most pleasant sound. Plus they come with a lifetime warranty if you buy their filters which are reasonably priced.

NumerousAssumption47 in r/AirPurifiers

February 16, 2026 5:53 PM

1

Quiet air purifier for bedroom

The "not Hepa" thing is really not that important, and I think some technicality. As Levoits still do an excellent job filtering the air. It just might take a few seconds longer or some such. As even running it on different speeds can sometimes determine if it's officially that threshold or not. If

...

Person51389 in r/AirPurifiers

April 4, 2026 7:28 PM

1

Levoit Core 300S or Philips Puretech Mini 900?

Here In US we don't have Phillips so much, so I've never had one, although they do some popular/common in posting in here and are probably OK. I have multiple Levoits though and love them. As for being quiet in sleep mode you might want to look at th Levoit unit sprout, that is more for a nightstand

...

Person51389 in r/AirPurifiers

April 8, 2026 12:38 PM

1

Recommendation for small bedroom

Thank you very much for your thorough recommendation(s). As for the moisture problem, we waterproofed the basement last summer as water had been penetrating the basement wall. While that problem has been addressed, there is still efflorescence on the basement slab so we do run a dehumidifier down th

...

Much_Injury_3479 in r/AirPurifiers

March 19, 2026 5:26 PM

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

...

NumerousAssumption47 in r/AirPurifiers

January 23, 2026 3:49 AM

1

Top alternatives in Air Purifiers

#1