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Comparison

Ninja AF300UK vs Ninja AF451UK vs Ninja FN101UKST: specifications

Manufacturer-listed specifications for Ninja AF300UK, Ninja AF451UK, Ninja FN101UKST, presented by product with source links.

By MainBuyer Editorial TeamPublished 20 October 2026Updated 20 October 2026Research-based assessment
Products referenced

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Specifications side by side

The approved specifications are grouped by topic below. Entries may describe different features or use different units. A missing entry means this article has no approved claim for that topic, not that the product lacks a feature.

Manufacturer-listed specifications by topic
TopicNinja AF300UKNinja AF451UKNinja FN101UKST
Capacity
  • Each drawer fits up to 1kg of fries or a 1.6kg chicken.
  • The air fryer has a total capacity of 9.5L.
  • Each drawer fits up to 1.4kg of fries or a 2kg chicken.
Not covered in this article’s approved evidence.
DimensionsNot covered in this article’s approved evidence.
  • Product dimensions are 50.8 cm L x 40.59 cm W x 41.5 cm H.
  • Product dimensions are 24.84 cm L x 29.74 cm W x 29.26 cm H.
WeightNot covered in this article’s approved evidence.
  • The air fryer weighs 12.9 kg.
  • The Ninja CRISPi FN101UKST weighs 5.08 kg.
PowerNot covered in this article’s approved evidence.Not covered in this article’s approved evidence.
  • Electrical rating is 240 volts, 1,700 watts and 8 amps.
Documented modes
  • The air fryer offers 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Reheat and Dehydrate.
  • The air fryer has 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate and Reheat.
  • The Ninja CRISPi is a 4-in-1 portable glass air fryer cooking system.
Documented controls
  • It has 2 separate cooking drawers, and cooking programs and times can be synced or matched between the drawers.
  • The air fryer has variable temperature controls.
  • The two separate cooking drawers allow cooking programs and times to be set to SYNC or MATCH.
Not covered in this article’s approved evidence.
Documented components
  • Parts of the air fryer are dishwasher safe.
  • The unit includes a Digital Cooking Probe that monitors food temperature.
  • Box contents: main unit, 2 non-stick drawers, 2 non-stick crisper plates and 1 digital cooking probe.
  • The box includes a 1.4L glass container, a 3.8L Ninja glass container, an adaptor, a large crisper plate, a small crisper plate, a large lid and a small lid.
Documented design details
  • The air fryer has 2 independent cooking zones, allowing different foods, times and programs to be cooked in each zone.
  • The air fryer has 2 independent cooking zones, so different foods can be cooked with different programs and times.
  • The CleanCrisp glassware is dishwasher-safe.
SourceNinja AF300UK manufacturer sourceNinja AF451UK manufacturer sourceNinja FN101UKST manufacturer source

Ninja AF300UK

  • Each drawer fits up to 1kg of fries or a 1.6kg chicken.
  • The air fryer has 2 independent cooking zones, allowing different foods, times and programs to be cooked in each zone.
  • It has 2 separate cooking drawers, and cooking programs and times can be synced or matched between the drawers.
  • The air fryer offers 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Reheat and Dehydrate.
  • The air fryer has variable temperature controls.
  • Parts of the air fryer are dishwasher safe.

Ninja AF451UK

  • The air fryer has a total capacity of 9.5L.
  • The air fryer has 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate and Reheat.
  • The unit includes a Digital Cooking Probe that monitors food temperature.
  • Product dimensions are 50.8 cm L x 40.59 cm W x 41.5 cm H.
  • The air fryer weighs 12.9 kg.
  • Box contents: main unit, 2 non-stick drawers, 2 non-stick crisper plates and 1 digital cooking probe.
  • The air fryer has 2 independent cooking zones, so different foods can be cooked with different programs and times.
  • The two separate cooking drawers allow cooking programs and times to be set to SYNC or MATCH.
  • Each drawer fits up to 1.4kg of fries or a 2kg chicken.

Ninja FN101UKST

  • The Ninja CRISPi FN101UKST weighs 5.08 kg.
  • Product dimensions are 24.84 cm L x 29.74 cm W x 29.26 cm H.
  • Electrical rating is 240 volts, 1,700 watts and 8 amps.
  • The box includes a 1.4L glass container, a 3.8L Ninja glass container, an adaptor, a large crisper plate, a small crisper plate, a large lid and a small lid.
  • The Ninja CRISPi is a 4-in-1 portable glass air fryer cooking system.
  • The CleanCrisp glassware is dishwasher-safe.

Manufacturer sources

Bottom line

These are manufacturer-listed specifications. This overview does not report hands-on testing or make a recommendation.

Methodology

How this article was prepared

This is a research-based MainBuyer article using current web evidence, official product information and verified MainBuyer product records. It does not claim hands-on laboratory testing.

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