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Ninja Double Stack SL201 specifications and in-depth review

Ninja Double Stack SL201

Manufacturer: Ninja

The Ninja Double Stack SL201 is a basket-style air fryer designed around the convenience of dual independent cooking zones, each holding 4 litres of capacity. With six preset functions — air fry, bake, roast, toast, reheat, and dehydrate — it covers a broad range of everyday cooking tasks from a single countertop appliance. Digital controls make adjusting settings straightforward, and a preheat function helps bring the cooking chamber up to temperature before use.

Running at 1690W, the SL201 supports temperatures between 40°C and 210°C, giving reasonable flexibility across different cooking methods. It features dual heating elements and a dual zone sync option, allowing both baskets to finish cooking at the same time. The unit measures 452 mm wide, 286 mm deep, and 385 mm tall, weighing approximately 9.65 kg. Dishwasher-safe baskets simplify cleanup, and the appliance carries a one-year warranty. It does not include a window, interior light, shake reminders, or any smart home connectivity.

Pros
  • Dual-basket design with two separate 4-litre compartments allows two different foods to be cooked at the same time
  • Dual zone sync feature coordinates both baskets to finish cooking simultaneously, reducing the need for manual timing
  • Six preset cooking functions — air fry, bake, roast, toast, reheat, and dehydrate — cover a wide range of everyday cooking tasks
  • Wide temperature range from 40°C to 210°C provides flexibility across different cooking methods
  • Dishwasher-safe baskets simplify cleaning after use
  • Preheat function allows the cooking chamber to reach the target temperature before food is added
Cons
  • No viewing window or interior light, making it impossible to check on food without opening the baskets
  • No shake reminders, requiring the user to manually track when food needs to be turned or shaken
  • No smartphone remote control or smart home compatibility, limiting automation and remote monitoring
  • At 9,653 g, the unit is relatively heavy, which may make it difficult to move or reposition on a countertop
  • Warranty period is limited to one year
  • Lacks shake reminder functionality entirely, offering no assisted guidance during the cooking process
Who is this for?

This air fryer suits households that regularly cook multiple dishes at once, thanks to its dual 4-litre baskets with zone sync that lets both compartments finish at the same time. The broad selection of six preset functions — covering everything from air frying to dehydrating — makes it a practical fit for users who want versatile everyday cooking from a single appliance. The dishwasher-safe baskets also make it a reasonable choice for those who prioritise easy cleanup after meals.

Who is this NOT for?

Users with limited counter space may find the unit's footprint of 452 mm wide and 286 mm deep, combined with a weight of nearly 9.7 kg, difficult to accommodate or reposition regularly. Those who prefer to monitor their food visually during cooking will be hindered by the lack of a viewing window and interior light, as checking progress requires opening the basket each time. Additionally, anyone looking for smart home integration or remote control via a smartphone will find this model unsuitable, as it offers no connectivity features of that kind.

General info:

style Basket
capacity 4 & 4 l
is a dual-basket air fryer ✓
preset functions Air fry, Bake, Roast, Toast, Reheat, Dehydrate
number of functions 6
maximum cooking temperature 210°C
minimum cooking temperature 40°C
operating power consumption 1690W
warranty period 1 years

The Ninja Double Stack SL201 is a basket-style air fryer with two independent 4-litre compartments, making it a dual-basket unit suited to cooking separate dishes simultaneously. It offers six preset functions — air fry, bake, roast, toast, reheat, and dehydrate — with a operating temperature range spanning from 40°C up to 210°C. The appliance draws 1690W during operation and comes with a one-year warranty.

Features:

has dual zone sync ✓
has dual heating elements ✓
has digital controls ✓
shake reminders None
has a window ✕
has a preheat function ✓
has an interior light ✕
supports a remote smartphone ✕
works with Alexa ✕
compatible with Google Assistant ✕

The unit includes dual zone sync and dual heating elements, allowing both cooking compartments to operate in a coordinated manner. Digital controls handle all adjustments, and a preheat function is available to bring the fryer up to temperature before cooking begins. There are no shake reminders, and the fryer lacks both a viewing window and an interior light. It does not support smartphone remote control and has no compatibility with Alexa or Google Assistant.

Design:

has a dishwasher-safe basket/pot ✓
width 452 mm
thickness 286 mm
height 385 mm
weight 9653 g
volume 49769.72 cm³

The Ninja Double Stack SL201 measures 452 mm wide, 286 mm deep, and 385 mm tall, with a total volume of 49,769.72 cm³, giving a clear sense of the countertop space it occupies. It weighs 9,653 g, reflecting the substantial build that comes with a dual-basket configuration. The baskets are dishwasher-safe, making post-cooking cleanup more convenient.

Final Verdict

The Ninja Double Stack SL201 is a well-specified dual-basket air fryer that delivers genuine cooking flexibility through its dual zone sync and six preset functions, making it a practical choice for households that regularly prepare multiple dishes at the same time. Its wide temperature range, dishwasher-safe baskets, and preheat capability round out a functional feature set aimed at everyday use. That said, the absence of a viewing window, interior light, and any smart connectivity means it caters to users who value cooking performance over convenience extras. For those whose priority is versatile, simultaneous cooking without reliance on app control or visual monitoring, the SL201 presents a capable and straightforward option.