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Alen 45i

Physical Product · Air purifiers & air quality · 12 mentions · 1 subreddit · discussed in r/AirPurifiers

Reddit take

Not enough linked mention summaries yet; the source excerpts below are the evidence.

Pros

  • I have an Alen 45i for VOcs, but I just have a 750 ft sq apartment. And 8x units in here though, inherited an old smelly carpet, mold was present, allergies etc. So I needed extreme coverage...and 8-11ach.
  • Depends on your room sizes. But likely a 75i for your living room and 45i or flex for the bedroom.
  • Alen has a little more, so an Alen 45i with their best filter is like 450 and has maybe 1-2 pounds. That's what I have.
  • Alen is exceptionally quiet and has a lifetime warranty for as long as you buy genuine Alen filters. Get the filters with carbon as well. The filters last about a year.
  • If you want a quietish brand with a lifetime warranty...then you might like Alen. They don't move as much air as an equal priced Winix/Levoit/Coway...but they are decently powerful and good against VOCs with their best filter. And come w...

Cons

  • I have an Alen 45i which is good with their best filters, but like 2-3 pounds of carbon vs 10-15 for those others. ... They don't move the most air though
  • the 45i lists Covers up top 1,900 sq ft every hour or 950 sq ft every 30 minutes. which is 1 or 2 air changes ratings.
  • Say the 45i which is similar to the vital 200s is only 70 vs 50. But the vital 200 is also 169-189 so it’s not quite as bad as the larger unit at 8-10 years for filters cost difference to pay a new unit it’s self. ... looking at house fr...
  • Almost went with two Alen 45i units, probably due to FB ads. Phone knew I've been wanting to buy. Then Gemini and chat are giving different recommendations and it seems from here I should consider Coway or Winix and once again, I'm ove...

Sentiment

8 positive (67%) · 4 mixed (33%) · 0 negative (0%)

Trust + time weighted score: +66% · raw score 67%

What redditors said (10 of 12)

I have an Alen 45i for VOcs, but I just have a 750 ft sq apartment. And 8x units in here though, inherited an old smelly carpet, mold was present, allergies etc. So I needed extreme coverage...and 8-11ach.
positive · u/P****9 · r/AirPurifiers · comment · Sep 8, 2026 · open on Reddit ↗
I have an Alen 45i which is good with their best filters, but like 2-3 pounds of carbon vs 10-15 for those others. ... They don't move the most air though
mixed · u/P****9 · r/AirPurifiers · comment · Sep 3, 2026 · open on Reddit ↗
Depends on your room sizes. But likely a 75i for your living room and 45i or flex for the bedroom.
positive · u/C****7 · r/AirPurifiers · comment · Sep 1, 2026 · open on Reddit ↗
Alen has a little more, so an Alen 45i with their best filter is like 450 and has maybe 1-2 pounds. That's what I have.
positive · u/P****9 · r/AirPurifiers · comment · Aug 25, 2026 · open on Reddit ↗
the 45i lists Covers up top 1,900 sq ft every hour or 950 sq ft every 30 minutes. which is 1 or 2 air changes ratings.
mixed · u/d****9 · r/AirPurifiers · comment · Aug 6, 2026 · open on Reddit ↗
Alen is exceptionally quiet and has a lifetime warranty for as long as you buy genuine Alen filters. Get the filters with carbon as well. The filters last about a year.
positive · u/C****7 · r/AirPurifiers · comment · Jul 17, 2026 · open on Reddit ↗
Say the 45i which is similar to the vital 200s is only 70 vs 50. But the vital 200 is also 169-189 so it’s not quite as bad as the larger unit at 8-10 years for filters cost difference to pay a new unit it’s self. ... looking at house freshes review the levoit did quite a bit better than the 45i.
mixed · u/d****9 · r/AirPurifiers · comment · Jul 11, 2026 · open on Reddit ↗
If you want a quietish brand with a lifetime warranty...then you might like Alen. They don't move as much air as an equal priced Winix/Levoit/Coway...but they are decently powerful and good against VOCs with their best filter. And come with a lifetime warranty if you stay in the filter replacment program. They are the quietest brand I own.
positive · u/P****9 · r/AirPurifiers · comment · Jul 11, 2026 · open on Reddit ↗
Almost went with two Alen 45i units, probably due to FB ads. Phone knew I've been wanting to buy. Then Gemini and chat are giving different recommendations and it seems from here I should consider Coway or Winix and once again, I'm overwhelmed and can't decide.
mixed · u/n****9 · r/AirPurifiers · comment · May 25, 2026 · open on Reddit ↗
Alen is a good brand too that is kind of good at both particulate and VOCs, with their best filter. And they have a lifetime warranty if you stay in filter replacement program.
positive · u/P****9 · r/AirPurifiers · comment · May 8, 2026 · open on Reddit ↗

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