25% OFF
$104.99
$139.99
Updated October 2026
Data from the official Blueair site.
2026 verdict
Blueair Blue Signature Small has the better all-around case than Blueair Blue Pure 511i Max in 2026, starting with sensors.
The comparison tilts its way because of sensors, with its broader overall balance keeping it in front. Blueair Blue Pure 511i Max is still relevant if you care most about price, but Blueair Blue Signature Small is the stronger recommendation overall. For most setups, Blueair Blue Signature Small is the smarter buy.
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| Feature | Blueair Blue Pure 511i Max | Blueair Blue Signature Small | Winner |
|---|---|---|---|
| Price | $104.99 | $179.00 | Blueair Blue Pure 511i Max |
| Sensors | PM1, PM2.5, PM10 | PM2.5, TVOC | Blueair Blue Signature Small |
| Rating | 4.5 | 4.5 | Tie |
| Warranty | 1 year | 1 year | Tie |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Integrations | Google Home, Alexa | Google Home, Alexa | Tie |
| Filtration | HEPA Filter, Activated Carbon Filter, Washable Pre-Filter | HEPA Filter, Activated Carbon Filter | Tie |
| Auto Mode | YES | YES | Tie |
25% OFF
$104.99
$139.99
- + Price: $104.99
- - Sensors: PM1, PM2.5, PM10 vs PM2.5, TVOC
Winner
$179.00
- + Sensors: PM2.5, TVOC
- - Price: $179.00 vs $104.99
Frequently Asked Questions
Which is better overall: Blueair Blue Pure 511i Max or Blueair Blue Signature Small?
Blueair Blue Signature Small has the stronger overall profile in this comparison, especially for sensors.
What is the biggest difference between Blueair Blue Pure 511i Max and Blueair Blue Signature Small?
Price is one of the clearest differences: Blueair Blue Pure 511i Max lists $104.99, while Blueair Blue Signature Small lists $179.00.
Which one looks better on price?
Blueair Blue Pure 511i Max is listed at $104.99, while Blueair Blue Signature Small is listed at $179.00. Blueair Blue Pure 511i Max (better spec).
Who should buy Blueair Blue Pure 511i Max?
Choose Blueair Blue Pure 511i Max if your priority is price and that matters more than sensors.
Who should buy Blueair Blue Signature Small?
Choose Blueair Blue Signature Small if your priority is sensors and that matters more than price.
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