significantly quieter than the previous generation
One_Mess525 in r/HomeClimateTech
Source12 Reddit comments and posts discuss both products: 3 lean toward Blueair Blue Pure 311i Max, 8 toward Alen BreatheSmart 75i, and 1 don't pick a side.
significantly quieter than the previous generation
One_Mess525 in r/HomeClimateTech
Sourcesignificantly quieter than the previous generation
One_Mess525 in r/HomeClimateTech
Sourcesignificantly quieter than the previous generation
One_Mess525 in r/HomeClimateTech
SourceThe "BIFL" Lifetime Legend: Alen BreatheSmart 75i
One_Mess525 in r/HomeClimateTech
SourceThe "BIFL" Lifetime Legend: Alen BreatheSmart 75i
One_Mess525 in r/HomeClimateTech
SourceThe "BIFL" Lifetime Legend: Alen BreatheSmart 75i
One_Mess525 in r/HomeClimateTech
SourceGreen marks the row winner: the strongest supported feature sentiment with at least 3 mentions, or the lowest listed price. Everything else stays neutral.
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We may earn a small commission.
| Feature | Blueair Blue Pure 311i Max | Alen BreatheSmart 75i |
|---|---|---|
| Price | ||
| noise level | ||
| coverage area | ||
| build quality | ||
| purification performance | ||
| filter quality | ||
| warranty | No mentions | |
| design | ||
| odor control | ||
| allergen control | ||
| smart features |

Blueair
CA$319.99
Reddit score
RedDB's algorithmic rating based only on relevant Reddit opinions.
It uses one opinion per author: their highest-upvoted mention.
Evidence volume, recency, and votes affect the result.
The opinion count and sentiment bar include all analyzed relevant opinions; the bar does not represent the score out of 100.
We may earn a small commission.

Alen
CA$1,533.65
Reddit score
RedDB's algorithmic rating based only on relevant Reddit opinions.
It uses one opinion per author: their highest-upvoted mention.
Evidence volume, recency, and votes affect the result.
The opinion count and sentiment bar include all analyzed relevant opinions; the bar does not represent the score out of 100.
We may earn a small commission.
12 Reddit comments and posts discuss both products: 3 lean toward Blueair Blue Pure 311i Max, 8 toward Alen BreatheSmart 75i, and 1 don't pick a side. Overall, Reddit leans toward Alen BreatheSmart 75i.
Across all discussions RedDB tracks, Blueair Blue Pure 311i Max has 86% positive sentiment over 43 Reddit mentions, while Alen BreatheSmart 75i has 94% positive sentiment over 70 mentions.