The "BIFL" Lifetime Legend: Alen BreatheSmart 75i
One_Mess525 in r/HomeClimateTech
Source12 Reddit comments and posts discuss both products: 0 lean toward Blueair Blue Pure 311i Max, 10 toward Alen 75i, and 2 don't pick a side.
Green marks the row winner: the strongest supported feature sentiment with at least 3 mentions, or the lowest listed price. Everything else stays neutral.
We may earn a small commission.
We may earn a small commission.
| Feature | Blueair Blue Pure 311i Max | Alen 75i |
|---|---|---|
| Price | ||
| noise level | ||
| purification performance | ||
| coverage area | ||
| odor control | ||
| value | ||
| warranty | No mentions | |
| filter quality | ||
| build quality | ||
| airflow | ||
| allergen control |

Blueair
$229.00
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
$799.00
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: 0 lean toward Blueair Blue Pure 311i Max, 10 toward Alen 75i, and 2 don't pick a side. Overall, Reddit leans toward Alen 75i.
Across all discussions RedDB tracks, Blueair Blue Pure 311i Max has 86% positive sentiment over 43 Reddit mentions, while Alen 75i has 86% positive sentiment over 110 mentions.