BLUEAIR Blue Pure 311i Max vs BLUEAIR Blue Signature SP3i

BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than BLUEAIR Blue Signature SP3i.

Which purifier has higher CADR?

BLUEAIR Blue Pure 311i Max has higher CADR (365 vs 321 CFM).

Which purifier is quieter?

BLUEAIR Blue Pure 311i Max is quieter (23 vs 54 dB).

Which purifier covers a larger room?

BLUEAIR Blue Pure 311i Max fits a larger room (about 566 vs 498 sq ft recommended from CADR).

Which purifier has better smart features?

Both list smart features (None vs None).

Which purifier has longer filter life?

BLUEAIR Blue Pure 311i Max lists 9 months; BLUEAIR Blue Signature SP3i lists 1. Intervals are as published and are not converted to a single unit.

Bottom line

BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than BLUEAIR Blue Signature SP3i.

MetricBLUEAIR Blue Pure 311i MaxBLUEAIR Blue Signature SP3i
CADR (smoke)365 CFM321 CFM
Recommended room size566 sq ft498 sq ft
Claimed coverage2107 sq ft2250 sq ft
Noise23 dB54 dB
Filter typeHEPASilentHEPASilent
Filter interval9 months1
Smart featuresNoneNone

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Methodology