Ninja Double Stack XL 9.5 litre Air Fryer – SL400UK


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Standard Delivery From Wednesday 22nd May

Further details can be found on our delivery information page.

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Key Features

  • Space-saving stacked drawers: 30% slimmer*
  • Evenly cook 4 layers of food with included Stacked Meal racks
  • Perfect for up to 8 people, large families & entertaining
  • Cook using up to 55% less energy than an oven**
  • Fast family favourites: up to 55% faster than fan ovens***
  • 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, Recipe Guide
  • H38.5cm x W28cm x D47cm. Weight: 10.3kg. Colour: Black.
  • 2-year guarantee upon registration with Ninja (UK & ROI only)

Wish you could fit a double air fryer in your kitchen, but running low on worktop space?
Introducing the Ninja Double Stack XL 2-Drawer Air Fryer.

This double air fryer towers above the rest, with 2 vertical stacked drawers that take up less space on your worktop than traditional side-by-side 2-drawer air fryers.

Now you can mix and match 6 cooking functions, cooking times and temperatures across 2 individually-controlled drawers, and have all your food ready at the same time – even in smaller kitchen spaces!

Ninja Double Stack XL Features

Ninja Double Stack XL 9.5L Air Fryer SL400UK at Gerald Giles

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. At 38.5cm tall, it’s designed to fit under cabinets.

Ninja Double Stack XL 9.5L Air Fryer SL400UK at Gerald Giles

Cook 4 foods at once
Only Ninja has Double Stack Air Fry Technology. Cook on 4 levels at the same time, layering your foods with 2 included racks. Food is evenly cooked and crisped on all levels, so you can cook chicken tenders in the same drawer as fries, salmon in the same drawer as asparagus, or the ultimate combo of party foods. Perfect for mix-and-match meals, buffet food, and feeding a crowd.

6 cooking functions
Mix. Match. Stack. Use a different program, temperature and cook time in each drawer, with 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate, Reheat. The SYNC function ensures both drawers finish cooking at the same time. The MATCH function uses the same settings in each drawer to cook larger quantities of one food.

Fast family favourites
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.

30% slimmer* without compromising on capacity:
This double-drawer air fryer is perfect for large families and entertaining, fitting a whole 1.4kg roast chicken in each 4.75L drawer. Perfect for feeding up to 8 people.

At 38.5cm tall, it’s designed to fit under cabinets – so you can enjoy clear countertops with less clutter.

2x capacity** with Double Stack Air Fry Technology:
Cook on 4 levels at once for evenly crispy results. Simply insert the included Stacked Meal racks into each drawer to double your cooking surface.

Even cooking and crisping on 4 levels: each drawer has an individual heat source and rear fan, delivering 360° air circulation for all-over crispy results. Layer your food on the racks for multi-level cooking – perfect for making chicken thighs with asparagus, salmon fillets with new potatoes, beef burgers with French fries, or a selection of party food.

2 independently controlled drawers:
Mix and match different cooking functions, times and temperatures in each drawer. The SYNC functions ensures both drawers finish cooking at the same time – so you can enjoy freshly-cooked mains and sides together, serve up a party buffet with everything freshly cooked, or easily cater for different tastes and dietary requirements.

Cooking up to 55% faster than fan ovens***, you can have family favourites on the table in minutes. Only cooking for yourself? Just cook in 1 drawer to make smaller portions. Each drawer also includes a crisper plate to help the hot air surround your food and cook it to perfection.

6 cooking functions:
Air Fry your favourite foods using little to no oil – up to 75% less fat than traditional frying methods****. More than an air fryer, you can also Roast, Bake, Dehydrate, Reheat, and cook from frozen to extra-crispy with Max Crisp.
What’s more, cooking with this air fryer uses up to 55% less energy than an oven† making it energy-efficient to run.

Easy to use:
The sleek control panel is positioned to the side for easy access, so it’s simple to select your desired settings in each drawer.
We know life is busy and full of distractions, so Ninja air fryers automatically stop cooking when the digital timer ends. There’s a chef-created Recipe Guide in the box, packed with ideas to get you started and cooking charts to help make the most of your new appliance.

Easy to clean:
The non-stick drawers, crisper plates and wire racks are all dishwasher-safe and easy to wipe clean.

For your peace of mind, Ninja offers a free 2-year guarantee upon registration (UK & ROI only).

What’s Included in the box?

  • Main Unit 2470W
  • 2 x 4.75L Non-Stick Drawers
  • 2 x Non-Stick Crisper Plates
  • 2 x Multi-Layer Rack
  • Instruction Booklet

*vs Ninja AF400UK
**when using removable racks
***tested against fish fingers and sausages
****tested against deep fried, hand-cut French fries.


The Ninja Double Stack XL 9.5 litre Air Fryer – SL400UK is a versatile kitchen appliance designed to revolutionize the way you cook. With its innovative features and numerous benefits, it has become a favorite among home chefs and cooking enthusiasts alike. Let’s delve into what makes this air fryer stand out:

  • Double Stack Design: One of the most notable features of the Ninja Double Stack XL Air Fryer is its double stack design, allowing you to cook two separate dishes simultaneously. This not only saves time but also enables you to prepare a complete meal all at once, making it ideal for busy weeknights or entertaining guests.
  • Large Capacity: With a generous 9.5-liter capacity, this air fryer provides ample space for cooking large portions of food, making it perfect for families or gatherings. Whether you’re frying, roasting, or dehydrating, you can easily accommodate enough food to satisfy everyone’s appetite.
  • Versatility: Beyond just air frying, the Ninja Double Stack XL Air Fryer offers a wide range of cooking functions, including roasting, baking, dehydrating, and even grilling. This versatility eliminates the need for multiple appliances cluttering your kitchen countertops, saving both space and money.
  • Precision Cooking: Equipped with precise temperature control and customizable cooking settings, this air fryer ensures consistently delicious results every time. Whether you prefer crispy fries, juicy meats, or perfectly baked goods, you can achieve the desired texture and flavor with ease.
  • Healthier Cooking: Air frying technology allows you to enjoy your favorite fried foods with significantly less oil, reducing calories and fat intake without sacrificing taste or texture. The Ninja Double Stack XL Air Fryer promotes healthier cooking habits, making it easier to stick to a balanced diet without compromising on flavor.
  • Easy to Clean: Cleaning up after cooking is a breeze with the Ninja Double Stack XL Air Fryer. The non-stick surfaces and dishwasher-safe components make maintenance hassle-free, allowing you to spend less time scrubbing and more time enjoying your meals.
  • Time-Saving Convenience: With its rapid cooking technology, this air fryer can significantly reduce cooking times compared to traditional methods. Whether you’re preparing a quick snack or a full-course meal, you can enjoy delicious food in a fraction of the time, leaving you with more time to spend with family and friends.
  • Smart Features: The Ninja Double Stack XL Air Fryer is equipped with intelligent features such as programmable cooking presets, preheat functions, and timer settings, allowing you to customize your cooking experience according to your preferences. Additionally, it features a sleek digital display and intuitive controls for effortless operation.
  • Durable Construction: Built to last, this air fryer is constructed from high-quality materials that can withstand regular use and maintain optimal performance over time. Its sturdy design ensures stability and durability, providing peace of mind for years to come.
  • Recipe Inspiration: To help you get the most out of your Ninja Double Stack XL Air Fryer, it comes with a variety of delicious recipes and cooking tips to inspire your culinary creations. From appetizers and main courses to desserts and snacks, the possibilities are endless with this versatile kitchen appliance.

In conclusion, the Ninja Double Stack XL 9.5 litre Air Fryer – SL400UK offers a winning combination of innovative features and practical benefits that make it a must-have addition to any kitchen. Whether you’re a seasoned chef or a novice cook, this versatile appliance simplifies meal preparation, promotes healthier eating habits, and delivers delicious results with every use.


  • Cook using less energy than an oven
  • Feeds up to 8 people
  • Includes Chef-created recipe guide
  • Automatically stops cooking when the digital timer ends
  • SYNC and MATCH functions
  • CategoryHeated - Air Fryers
  • Colour Grey
  • Product Weight 10.3kg
  • Product Dimensions (cm) H:38.5 x W:28 x D:47 cm
  • Cord Length 0.8m
  • Capacity9.5L (4.75L per drawer)
  • Wattage2470W
  • Dish Washer Safe Components - Yes
  • Timer- Yes
  • Pre-Set Functions 1. Max Crisp 2. Air Fry 3. Roast 4. Reheat 5. Dehydrate 6. Bake
  • Non-Slip Feet- Yes
  • Guarantee 2 years
  • Barcode 622356280815
  • Free 2-year guarantee only upon registration with Ninja (UK & ROI only)

We offer FREE delivery on orders over £100. Deliveries of small items are made by DHL or Royal Mail.

Large appliances are delivered by our own delivery teams, installation services can also be selected during the checkout process. Unfortunately, we are not able to deliver some large appliances outside of Norfolk and North Suffolk at the moment; you will be informed of this during the order process if you enter a postcode outside of our delivery zone.

Some manufacturers offer direct delivery of large appliances; you will be informed if this is available during the order process.

We aim to dispatch within 2 workings days of the order being placed. You will receive an email confirming your delivery date.

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We offer installation services on large home appliances, you can select additional services at checkout.
We offer the following installation services:

Televisions & Associated Devices - from £45.00
Washing Machines - from £30.00
Washer Dryers - from £30.00
Tumble Dryers - from £15.00
Dishwashers - from £30.00
Refrigeration - from £15.00
Ovens & Cookers - from £90.00

All installations are carried out by our own experienced engineers. Our installation services are only available in Norfolk and North Suffolk, you will be asked for your postcode during the checkout process to see if these services are available to you.

Upon receipt of your order, we will call you to arrange a convenient time for your delivery and installation to take place.

For full details follow the link below.

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