Agent Review Data
Blue Signature Medium Nordic Fog product image

Image source ↗

Air purifiers / Blueair / 113861

Blue Signature™ Medium Nordic Fog

Blue Signature Medium Nordic Fog exact UK model, compared using published specifications, a timestamped source offer and claim-level evidence limits.

Product score77.9/100Category-specific technical scoreTechnical rank #7
Conservative CADR input
525 m³/h
source ↗ · checked 29 Jul
Raw published CADR
Smoke 545; dust 525; pollen 561 m³/h
source ↗ · checked 29 Jul
Exact identity
SKU 113861
source ↗ · checked 29 Jul
Review verdictNot ranked from reviews

There is not enough comparable hands-on evidence for this model yet.

See the reviewed models →

The stored offer is older than 48 hours, so price and stock claims are hidden until the next source check.

Retailer listingView retailer listing at Blueair UK Current price withheld because the tracked offer is older than 48 hours
About this result
Secondary specification scopeEligible for specification comparison
Purchase adviceNot currently supported

Secondary specification rank #7 compares published inputs inside the tracked category cohort. It is not the review-led quality result or a reviewed instruction to buy this product.

Candidate-set and method sensitivity are now retained for this leading cohort. They do not satisfy the missing evidence or human review gates.

  • independent exact model evidence missing
  • controlled measurement missing
  • safety not structured
  • claim level trace missing

Reviews checked 30 Jul 2026, 21:39 BST · product data checked 29 Jul 2026, 18:17 BST.

Technical comparisonSpecification context

Specification rank #7 among air purifiers: conservative cadr input 525 m³/h. Published inputs, not our lab test.

Published comparison inputs

Conservative CADR input
525 m³/h
source ↗ · checked 29 Jul
Raw published CADR
Smoke 545; dust 525; pollen 561 m³/h
source ↗ · checked 29 Jul
Exact identity
SKU 113861
source ↗ · checked 29 Jul

Published features

HEPASilent particle and carbon filtration

Why the specification score is 77.9

Value at checked price55% weight
74

Score uses the exact model's published specification and checked offer; it is not a laboratory result.

Published CADR throughput45% weight
82.6

Score uses the exact model's published specification and checked offer; it is not a laboratory result.

Evidence report
Product evidence report

What matters, what we know and what is missing

Open evidence report JSON ↗

This is a specification-ranked comparison report, not purchase advice. It uses the category evidence profile below and keeps hands-on findings separate from the published specification score.

Primary real-world questionCADR and pollutant basis

Attributable smoke, dust or pollen CADR with units, test standard and filter configuration.

Hands-on synthesisnot collected

No exact-model hands-on synthesis is published. This report covers sourced comparison inputs, coverage and open gaps; it makes no claim about real-world performance beyond retained sources.

Specification rank#7

Inside the bounded published category method.

Stress-test range#6–#10

Across 6 factor-removal and weight-change scenarios.

Purchase adviceBlocked

6 blocking gaps remain.

Official sourceRetained
Independent editorial0
Owner pools0
Retailer observations1/2
Controlled measurements0
Human second reviewNot completed
Category evidence needs, decision cruxes and constraints
CADR and pollutant basis

Attributable smoke, dust or pollen CADR with units, test standard and filter configuration.

Hands-on state: not collected
Pollutant removal performance

Controlled concentration-decay testing with pollutant, room, duration and background conditions.

Hands-on state: not collected
Room size and air changes

A calculation tied to verified airflow or CADR, room volume and target air changes.

Hands-on state: not collected
Noise

Mode-specific measurement with distance and room background disclosed.

Hands-on state: not collected
Energy use

Measured consumption by operating mode.

Hands-on state: not collected
Filter cost and life

Exact replacement-filter identity, checked cost and observed or bounded life assumptions.

Hands-on state: not collected
Sensors and controls

Direct tests of sensor response, automatic mode, display, app and connectivity.

Hands-on state: not collected

Hands-on gate: Resolve the exact model and filter. Pollutant-removal conclusions require an attributable controlled measurement with pollutant basis and units.

Decision cruxes
Pollutant-specific CADR

Mixed or incomplete pollutant bases can materially change the throughput comparison.

Noise, filter and room performance

Published CADR alone does not establish acoustic performance, filter life or room clearing under shared conditions.

Buying constraints
Warranty
Not structured
Returns
not structured
Safety
not structured
Installation or setup
not structured
Normalized decision receipt

2 mapped fields each carry a canonical receipt hash and an origin status. Source access time is kept separate from field observation, so a configured value is not presented as freshly re-extracted.

sha256:dae4693313b162de73112049feaad2a4c91f95c682ac8d829d4f47fae222c567

The score and rank compare retained specification inputs inside this bounded category cohort. They are not a hands-on quality verdict and are not comparable across categories. Open evidence gaps block purchase advice regardless of specification score, rank, offer state or review-synthesis verdict.

Source notes and limitations

Evidence limitations

  • Published specifications are not Agent Review Data laboratory measurements.
  • The manufacturer-direct source offer and availability can change after the checked time.
  • Exact model identity is keyed to the model/SKU in the source register; related colours and bundles are not merged.

Recommendation caveats

  • The score compares published specifications and a checked offer; it is not a controlled performance test.
  • Scores are comparable only within this category.
  • Published CADR bases can differ by pollutant and test disclosure; the raw basis remains visible.
  • No separate third-party source passed the exact-model URL check at refresh.

Owner feedback across the web

No trustworthy exact-model owner-review pool was captured on the source page.

No exact-model review pool passed the current inclusion check.

Independent tests and owner discussion

No separate third-party source passed the exact-model check at this refresh.

No separate editorial, owner-pool or Reddit source passed the exact-model check at the last refresh.
  • No separate editorial, owner-pool or Reddit source was captured for this exact model.
Claim-level trace not yet modelled · 2 of 160 available

This record exposes source-linked inputs and their provenance status, but it does not yet model individual claims, relations and criterion contributions.

Inspect the trace build-out →

Sources

Exact product source and offer observationBlueair UK ↗

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