Ninja Double Stack XL 2-Level Air Fryer with Smart Cook System 9.5L SL451UK
Model: SL451UK
Add-ons & Accessories
- Digital Cooking Probe monitors food temperature for perfect results 30% slimmer*:
- Perfect for 8+ people, large families & entertaining.
- Evenly cook 4 layers of food with 2x Double Stack meal racks Cook using less up to 55% energy than an oven**.
- 6 functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate, Reheat.
- Includes 2x non-stick, dishwasher-safe 4.75L drawers & crisper plates, 2x stainless steel racks, Digital Cooking Probe, Recipe Guide.
- 2-year guarantee
*vs AF400
**Testing and calculations based on recommended cook time for sausages, using air fry function versus conventional ovens.
- Main Unit
- 2x non-stick, dishwasher-safe 4.75L drawers & crisper plates
- 2x stainless steel racks
- Digital Cooking Probe
- Recipe Guide
Free Next Day Delivery (over £30), 7 days a week†
We know life is busy, so our delivery service is designed to fit around you. Order before 8pm to get Free Next Day Delivery on orders over £30 every day, including weekends‡ – plus, flexible options to make receiving your order easy and convenient.
Not satisfied with your purchase? We offer Free 30-Day Returns on all main units.
†on Main Units. Free 2-Day Delivery on all FlexFlame Outdoor Cooking System purchases.
‡on orders of £30 or more. Please note – main unit orders will be delivered by DPD, the carrier will confirm once your order is dispatched. Parts & Accessories are delivered by DPD. Excludes Bank Holidays.
Ninja Double Stack XL 2-Level Air Fryer with Smart Cook System 9.5L SL451UK
Key Product Features
Space-saving design
With two cooking drawers stacked on top of each other, this compact double air fryer is 30% slimmer*, without compromising on capacity. Perfect for small kitchens, large families, and anyone who loves entertaining a crowd, fitting enough food for up to 8 people.
Cook 4 foods at once
Cook up to 4 foods at the same time with Double Stack Air Fry Technology and the included racks. With 6 cooking functions and independent drawer settings, you can air fry, roast, bake, crisp, dehydrate or reheat different dishes—all in one appliance.
Integrated digital cooking probe
The integrated Digital Cooking Probe continuously monitors your food's internal temperature and automatically stops cooking when it's perfectly done. From medium-rare steaks to juicy roasted chicken, enjoy precise, consistent results without the guesswork.
Easy family-size meals
The large 9.5L capacity feeds up to 8 people, fitting a 1.4kg roast chicken in each 4.75L drawer. Cooking up to 55% faster than fan ovens***, you can have family meals on the table in minutes.
See it in action
*vs AF400.
**Testing and calculations based on recommended cook time for sausages, using air fry function versus conventional ovens.
***tested against fish fingers and sausages.
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