Agent Review Data
Ranked #5 of 20 air fryers · evidence checked 27 Jul 2026, 22:04 BST
Ninja DoubleStack XL Air Fryer with Smart Cook System product imageNinja UK product page · source-hosted
Air fryers / Ninja / SL451UK

Ninja Double Stack XL 2-Level Air Fryer with Smart Cook System 9.5L SL451UK

Ninja DoubleStack XL Air Fryer with Smart Cook System exact UK model, compared using published specifications, a timestamped source offer and claim-level evidence limits.

Category score69.2/ 100
Category rank#5Ranked
Owner evidenceNot recorded0 unique pools
Checked offer£289.99in stock
Check price at Ninja UK →£289.99 · in stock · checked 22:04 · direct non-affiliate linkView evidence ↓
The short answer

Specification rank #5 among air fryers: capacity 9.5 L; published power 2,460 W. Published inputs, not our lab test.

This score is reproducible from the factors below and applies only within air fryers. It is not a cross-category score or a claim that we physically tested this unit.

Why it scored 69.2

Value at checked price22% weight
49.979585502948375

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

Published capacity22% weight
87.25

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

Cooking flexibility22% weight
86

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

Convenience features22% weight
68

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

Evidence coverage12% weight
52

0 separate third-party sources passed the URL check at refresh.

Published comparison inputs

Capacity
9.5 L
source ↗ · checked 27 Jul
Published power
2,460 W
source ↗ · checked 27 Jul
Cooking zones
2
source ↗ · checked 27 Jul
Checked price
£289.99
retailer ↗ · checked 27 Jul

Published features

Dual zoneSmart probeDishwasher-safe parts

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.

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.

Sources

Exact product and offer receiptNinja UK ↗