Introduction
Welcome to the user manual for your Ninja SL401 DoubleStack XL 10-Qt 2-Basket Air Fryer. This innovative appliance is designed to revolutionize your cooking experience by allowing you to prepare up to four different foods simultaneously, all within a space-saving vertical design. With its Double Stack Air Frying Technology, Smart Finish, and Match Cook functions, you can achieve perfectly cooked meals with ease and efficiency. This manual provides essential information for safe operation, setup, usage, and maintenance of your air fryer.

The Ninja DoubleStack XL Air Fryer, showcasing its dual basket design with food being cooked.
Important Safety Information
Please read all instructions carefully before using your Ninja DoubleStack XL Air Fryer to ensure safe operation and prevent property damage. Keep this manual for future reference.
- Electrical Safety: Always plug the appliance into a grounded outlet. Do not use with extension cords unless absolutely necessary and ensure the cord is rated for the appliance's wattage.
- Hot Surfaces: The air fryer and its accessories become extremely hot during and after operation. Always use oven mitts or insulated gloves when handling hot components.
- Ventilation: Ensure adequate air circulation around the appliance. Do not block air vents. Do not operate in an enclosed space.
- Cleaning: Always unplug the unit and allow it to cool completely before cleaning. Refer to the "Cleaning and Maintenance" section for detailed instructions.
- Children and Pets: Keep the appliance out of reach of children and pets. Close supervision is necessary when any appliance is used near children.
- Intended Use: This appliance is for household use only. Do not use it for anything other than its intended purpose.
What's Included
Your Ninja SL401 DoubleStack XL Air Fryer package includes the following components:
- 10-Quart Air Fryer Base Unit
- 2 Independent Cooking Baskets
- 2 Stacked Meal Racks
- 2 Crisper Plates
- Quick Start Guide & Recipe Book

An illustration of all components included with the Ninja DoubleStack XL Air Fryer, including the main unit, baskets, racks, crisper plates, and recipe book.
Setup
- Unpack: Carefully remove all packaging materials and any promotional labels from the appliance.
- Clean Components: Wash the cooking baskets, stacked meal racks, and crisper plates in warm, soapy water or place them in the dishwasher before first use. Rinse thoroughly and dry completely.
- Wipe Down Unit: Wipe the main unit with a damp cloth. Do not immerse the main unit in water or any other liquid.
- Placement: Place the air fryer on a clean, dry, level surface. Ensure there is at least 6 inches of clearance from the wall and on all sides to allow for proper air circulation. The space-saving design allows it to fit under most standard cabinets.

The Ninja DoubleStack XL Air Fryer positioned on a kitchen counter, demonstrating its space-saving design.
Operating Instructions
The Ninja DoubleStack XL Air Fryer offers versatile cooking options with its 6-in-1 functions and dual-zone technology.
Control Panel Overview
The digital control panel allows you to select cooking functions, adjust time and temperature, and utilize the Smart Finish and Match Cook features. The display shows cooking time, temperature, and selected zone (TOP/BOTTOM).
Cooking Functions (6-in-1)
- Air Fry: For crispy results with little to no oil. Ideal for fries, chicken wings, and vegetables.
- Air Broil: For quick cooking and browning.
- Roast: For tender meats and roasted vegetables.
- Bake: For baking cakes, pastries, and other baked goods.
- Reheat: To warm up leftovers while maintaining texture.
- Dehydrate: To remove moisture from foods for snacks like fruit leathers or jerky.
Double Stack Air Frying Technology
This technology allows you to cook up to four different foods simultaneously across two independent baskets. Each basket can be set to different cooking functions, times, and temperatures.

A diagram illustrating the Double Stack Air Frying Technology with two stacked baskets, allowing for cooking of four foods at once.
Using Stacked Meal Racks
The removable stacked meal racks allow you to create two levels within each basket, maximizing capacity and ensuring even cooking for smaller items or multiple portions.

The Ninja DoubleStack XL Air Fryer with a basket removed, showing the stacked meal rack holding salmon fillets above brussels sprouts.
Smart Finish & Match Cook
- Smart Finish: This feature synchronizes cooking times across both baskets so that different foods, set with different cooking programs, finish simultaneously. Select your desired settings for each zone, then press "Smart Finish" to begin.
- Match Cook: Use this function to apply the same cooking settings (function, time, temperature) to both baskets. This is ideal when cooking a large quantity of the same food, utilizing the full 10-quart capacity.

An illustration demonstrating the Match Cook feature, showing two 5-lb whole chickens being cooked simultaneously in the top and bottom baskets.
Cleaning and Maintenance
Proper cleaning and maintenance will extend the life of your Ninja DoubleStack XL Air Fryer and ensure optimal performance.
- Before Cleaning: Always unplug the air fryer from the power outlet and allow it to cool completely before disassembling or cleaning.
- Dishwasher Safe Components: The nonstick cooking baskets, crisper plates, and stacked meal racks are dishwasher safe for convenient cleanup. Place them on the top rack for best results.
- Hand Washing: For stubborn food residue, soak components in warm, soapy water before scrubbing with a non-abrasive sponge or brush.
- Main Unit: Wipe the exterior of the main unit with a clean, damp cloth. Do not use abrasive cleaners or scouring pads, as they may damage the finish. Never immerse the main unit in water or any other liquid.
- Storage: Ensure all parts are clean and dry before storing the appliance. Store it in a cool, dry place.

The cooking baskets, stacked meal racks, and crisper plates from the Ninja DoubleStack XL Air Fryer placed in a dishwasher for easy cleaning.
Troubleshooting
If you encounter any issues with your Ninja DoubleStack XL Air Fryer, refer to the following common troubleshooting tips:
- Appliance Not Turning On:
- Ensure the power cord is securely plugged into a grounded electrical outlet.
- Check your household circuit breaker or fuse box.
- Food Not Crispy Enough:
- Do not overcrowd the baskets. Cook in smaller batches if necessary.
- Ensure crisper plates are inserted correctly.
- Increase cooking time or temperature slightly.
- Shake or flip food halfway through cooking for even crisping.
- White Smoke from Unit:
- This may indicate cooking fatty foods. Ensure baskets and crisper plates are clean.
- A small amount of smoke during initial use is normal.
- Unit Emitting Burning Smell:
- Unplug immediately. Allow to cool. Check for any food debris or packaging material inside the unit or heating element. Clean thoroughly.
If the issue persists, please contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Name | DualZone XL 2-Basket Air Fryer (SL401) |
| Capacity | 10 Quarts (total) |
| Wattage | 120 watts |
| Material | Stainless Steel |
| Color | Grey |
| Product Dimensions (L x W x H) | 17.1 x 13.9 x 12.8 inches |
| Item Weight | 20 pounds |
| Control Method | Touch |
| Nonstick Coating | Yes |
| Dishwasher Safe Components | Yes (Baskets, Crisper Plates, Meal Racks) |
| UPC | 703670881749 |
Warranty and Support
For warranty information, product registration, or customer support, please refer to the contact information provided in your product packaging or visit the official Ninja Kitchen website. Please have your model number (SL401) and UPC (703670881749) ready when contacting support.





