BLUEAIR Blue Signature SP3i Air Purifier: CADR, Noise, Coverage & Specs
Last updated: Aug 22, 2026
Overview
BLUEAIR Blue Signature SP3i Air Purifier for Medium Rooms up to 2,250 sq ft, HEPASilent Filtration, WiFi Smart Control, Auto Mode, Odor & Smoke Removal, Pet…
CADR and room size
CADR (smoke): 321 CFM.
What room size is the BLUEAIR Blue Signature SP3i suitable for?
Recommended room size based on CADR: about 498 sq ft (CADR × 1.55).
Manufacturer claimed coverage: 2250 sq ft. This claim is higher than 3× CADR, so it is not used for ranking.
Filtration
What filter does it use?
HEPASilent.
Replacement interval: 1.
Noise
How loud is it?
Minimum reported noise: 54 dB.
Smart features
Does it have Wi-Fi?
Yes — app or Wi-Fi features are listed.
WiFi Smart Control, Auto Mode, Odor & Smoke Removal, AHAM Verified
Specifications
- CADR (smoke)
- 321 CFM
- Recommended room size
- 498 sq ft
- Manufacturer claimed coverage
- 2250 sq ft
- Noise
- 54 dB
- Filter type
- HEPASilent
- Filter replacement interval
- 1
- Power
- 36
- Dimensions
- 19.3" x 11.7" x 11.7"
- Weight
- 9.5
- Wi-Fi / app
- Yes
Comparisons
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Methodology
Specifications are compiled from manufacturer documentation, product listings and other cited sources. See methodology.