Double Stack Air Fry Technology
Enjoy crispy, even results across four cooking layers using the included stainless steel Stacked Meal racks. Each drawer features its own heating element and rear fan, ensuring 360° hot air circulation for perfect all-over crisping.
Two Independent Cooking Drawers
Mix and match different cooking functions, temperatures and times in each drawer. Use SYNC to ensure both drawers finish at the same time or MATCH to duplicate settings for double portions. Perfect for catering to dietary needs or preparing mains and sides simultaneously.
Six Versatile Cooking Functions
Choose from six preset cooking modes to suit every recipe:
• Air Fry – Crisp results with little to no oil (up to 75% less fat****)
• Max Crisp – Cook frozen favourites at 240°C for ultimate crunch
• Roast – Perfect potatoes, meat joints & vegetables
• Bake – Cakes, pastries, traybakes & desserts
• Reheat – Restore leftovers to fresh-out-of-the-oven goodness
• Dehydrate – Make fruit snacks, herbs & vegetable crisps
Feeds Up to 8 People
Each 4.75L drawer fits up to 1.4kg of food — even a whole roast chicken. Using the stacked racks doubles your cooking area for multi-level meals or party snacks.
Description
The Ninja Double Stack XL SL400UK is designed for cooks who want maximum capacity without losing valuable countertop space. Its innovative stacked vertical design allows for two large 4.75L drawers in a slimmer footprint, making it ideal for compact kitchens or busy families.
With Double Stack Air Fry Technology, each drawer includes a multi-layer stainless-steel rack, allowing you to cook up to four layers of food at once. Both drawers operate independently, using rear fans and individual heating elements to ensure even crisping from top to bottom.
Use SYNC to coordinate two totally different meals — for example, salmon in one drawer and crispy potatoes in the other — so everything finishes together. Or choose MATCH to double your portions using identical settings across both drawers.
The SL400UK offers six versatile functions, from Air Frying and Max Crisp to Roasting, Baking, Dehydrating and Reheating. Whether you're preparing snacks, full meals, desserts, or batch-cooking for the week, this air fryer delivers results fast — up to 55% quicker than a fan oven***.
Designed for convenience, its drawers, crisper plates and stacked racks are fully non-stick and dishwasher safe. With a powerful 2470W motor, energy-efficient performance**, and Ninja’s signature reliability, the Double Stack XL is a premium solution for effortless, family-sized cooking.
Technical Data
| Specification | Details |
|---|---|
| Brand | Ninja |
| Model | SL400UK |
| Total Capacity | 9.5L (2 × 4.75L drawers) |
| Cooking Functions | Air Fry, Max Crisp, Roast, Bake, Reheat, Dehydrate |
| Stacked Cooking | Yes – includes 2 × multi-layer racks |
| Technology | Double Stack Air Fry Technology with dual heating zones |
| Energy Savings | Up to 55% less energy vs. ovens** |
| Cooking Speed | Up to 55% faster than fan ovens*** |
| Fat Reduction | Up to 75% less fat than deep frying**** |
| Power | 2470W |
| Dimensions (H × W × D) | 38.5 × 28 × 47 cm |
| Weight | 10.3 kg |
| Colour | Grey |
| Cord Length | 0.8 m |
| Non-stick | Yes – drawers, racks & crisper plates |
| Dishwasher Safe | Yes |
| Accessories Included | 2 × drawers, 2 × crisper plates, 2 × stainless steel racks, recipe guide |
| Warranty | 2 years (with registration) |
*Based on recommended cook time for sausages using Air Fry vs conventional ovens. ***Tested against fish fingers & sausages. ****Tested against deep-fried, hand-cut French fries.
