# Ninja Double Stack XL SL400UK 9.5L Air Fryer

SL400UK: The Ninja Double Stack XL is a 9.5-litre air fryer with two independent drawers and six cooking functions. Its stacked layout provides four cooking levels with the included racks, while the two drawers can be used with Sync and Match functions.

- [Original product page](https://bargainpostbox.co.uk/product/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [View offer](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Ninja
- Model: Ninja Double Stack XL
- Category: Home & Kitchen > Kitchen Appliances > Air Fryers
- Price: 179.00 GBP
- Previous price: 269.99 GBP
- Discount: 34%
- Price checked: 2026-11-12T18:10:19.909Z
- Rating: 4.6 / 5
- Reviews: 1297

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Two drawers and two racks provide four cooking levels in a stacked design.
- Six functions cover Max Crisp, Air Fry, Roast, Bake, Reheat and Dehydrate.
- The two drawers have independent cooking zones, with Sync and Match functions listed.
- The listing claims capacity for up to eight portions and a space-saving design compared with the AF400. These are manufacturer claims, not independent measurements.

## Pros

- The 9.5-litre capacity and two drawers suit preparing food for a larger household or cooking different items separately.
- The supplied racks add two cooking levels above the drawers, allowing more food to be arranged within the stacked design.
- Dishwasher-safe parts and non-stick coating may make routine clean-up easier.

## Cons

- At 10.3kg, it is a substantial appliance to move around or store away between uses.

## Specifications

### Identity
- Brand: Ninja
- Model: Ninja Double Stack XL
### Capacity and cooking
- Capacity: 9.5 litres
- Cooking functions: Max Crisp, Air Fry, Roast, Reheat, Dehydrate, Bake
- Cooking zones: 2 independent cooking zones
- Temperature range listed: 80 Degrees Celsius to 190 Degrees Celsius
- Air frying technology: Rapid Air Circulation
### Power and controls
- Wattage: 2470 watts
- Output wattage also listed: 1500 Watts
- Voltage: 240 Volts
- Control method: Touch
### Dimensions and installation
- Dimensions listed: 47D x 28W x 38.5H centimetres
- Weight listed: 10.3 Kilograms
### Materials and care
- Material listed: Aluminium, Plastic
- Non-stick coating: Yes
### Appearance
- Colour: Grey

## Before you buy

- The listing gives two different power figures, 2470 watts and 1500 Watts, so confirm which applies to this model. It also separately lists a maximum setting of 190 Degrees Celsius and a feature claim of cooking up to 55% faster than fan ovens based on fish fingers and sausages. The speed and energy-saving percentages are test-specific manufacturer claims, not general guarantees.

## A good fit for

- Households wanting a large-capacity air fryer with two separate drawers and rack-based cooking levels.
- Buyers with limited counter width who prefer a stacked layout, provided the listed 47D x 28W x 38.5H centimetres dimensions fit their space.
- People who want air frying alongside roasting, baking, reheating, dehydrating and Max Crisp functions.

## Less suited to

- Buyers who need a lightweight appliance for frequent lifting or compact storage.
- Shoppers who need one definitive power rating before choosing, as two wattage figures are listed.

## Customer feedback

Customer feedback describes the appliance as space-saving for its capacity, useful for larger households and easy to clean, with reports of reliable performance. Cooking results and value are mixed, including reports of uneven cooking alongside praise for how it cooks. For buyers using both drawers and racks, those differing cooking experiences matter when planning meals across multiple levels. The overall rating distribution is mostly five-star but includes a smaller spread of low ratings, which does not establish why customers rated it that way.
- Positive themes: Customers describe it as space-saving and suitable for larger households.
- Positive themes: Customers mention ease of cleaning and reliable performance.
- Mixed feedback: Cooking performance receives mixed feedback, including reports of uneven cooking.
- Mixed feedback: Value for money is also assessed differently by customers.

## Frequently asked questions

### How many cooking functions does the Ninja Double Stack XL have?
The listing names six: Max Crisp, Air Fry, Roast, Bake, Reheat and Dehydrate.
### Can the drawers cook independently?
The product details specify two independent cooking zones. The listing also names Sync and Match functions across the two drawers.
### What comes with the air fryer?
The listing claims a UK-plug air fryer, two 4.75L drawers, two non-stick crisper plates and two racks. Confirm the selected listing's package details before ordering.
### Are the parts dishwasher safe?
The listing says the parts are dishwasher safe and specifies a non-stick coating.

## Offer details

- The listing claims a free two-year guarantee upon registration with Ninja, for the UK and Republic of Ireland only.

## Alternative options

- [XXL 12.4L Stacked Dual Basket KönigChef Double Drawer Vertical Family Air Fryer, 2800W, FRY FORCE 360°, 10 Presets, Match & Sync, LED Touch Display - ZHAF-968A](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
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- [Ninja MAX Dual Zone 9.5L Air Fryer, 2 Drawers, Gunmetal DZ400UK \| 6 functions: Air Fry, Max Crisp, Roast, Bake, Reheat and more. Cook up to 8 Portions, Non-Stick Dishwasher Safe Drawers.](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [Salter VertiCook Ultra Air Fryer, Vertical 9L Dual Drawer Digital \| 2 x 4.5L Baskets With Racks, 9 Presets With Sync And Match, PFAS-Free Nonstick, Dishwasher Safe Drawers, 60-230°C](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [Salter Toronto VertiCook Ultra Air Fryer, 9L Vertical Dual Drawer, Digital \| 2 x 4.5L Baskets With Racks, 9 Presets With Sync And Match, PFAS-Free Nonstick, Dishwasher Safe Drawers, 60-230 °C](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [Philips 4000 Series Stacked Dual Basket Airfryer 10L – RapidAir Technology \| Sync Finish, 2 Meals at Once, 45% Less Countertop Space, PFAS-Free Ceramic Coating, Easy View Windows \(NA460/09\)](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [Ninja Foodi 6-in-1 Dual Zone 7.6L Air Fryer, 2 Drawers, Black AF300UK \| 6 functions: Air Fry, Max Crisp, Roast, Bake, Reheat & Dehydrate. Cooks 4-6 Portions, Non-Stick, Dishwasher Safe Drawers](https://bargainpostbox.co.uk/visit/ninja-foodi-af300uk-dual-zone-air-fryer-76l)
- [FryEasy 150pcs Disposable Paper Air Fryer Liners for Ninja Air Fryer Double Stack, Ninja Double Stack Air Fryer Liners, Ninja Double Stack XL 9.5L Air Fryer SL400UK and 7.6l SL300UK](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [Salter Toronto VertiCook Ultra Air Fryer, 9L Vertical Dual Drawer, Digital \| 2 x 4.5L PFAS-Free Coated Baskets, 4-Level Cooking With Racks, 9 Presets With Sync & Match, LED Touchscreen, 2400W](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [Air Fryer Paper Liners for Ninja Double Stack: Fits SL400UK 9.5L and SL300UK 7.6L, Disposable Non-Stick Parchment Paper Baking Sheets, 50 Pieces](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
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- [120Pcs Air Fryer Liners for Ninja Dual, Stone TH Disposable Airfryer Parchment Paper Liners Accessories Compatible with Ninja AF300UK AF400UK SL400UK AF500UK, Other Dual Zone Air Fryer](https://bargainpostbox.co.uk/visit/stone-th-disposable-air-fryer-paper-liners-120-sheets)

## Add-ons

- [100PCS Ninja Double Stack XL 9.5L Air Fryer Liners, Dual Air Fryer Paper Liners for Ninja SL400UK, AF400UK, AF300UK, DZ400UK, Air Fryer Liners Disposable for Ninja, Keplin, Tower, Other Dual Airfryer](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)
- [BYKITCHEN Silicone Liners for Ninja Double Stack SL400UK, 2 Count \| 2 Perforated Gray Silicone Air Fryer Liners,Fit for Ninja Double Stack XL SL400UK 9.5L, Air Fryer Accessories](https://bargainpostbox.co.uk/visit/ninja-double-stack-xl-sl400uk-95l-air-fryer)

## Images

![Ninja Double Stack XL SL400UK 9.5L Air Fryer — 1](https://bargainpostbox.co.uk/i/e_rY71kppnGu4e02aQmlXyCVaGEqcjc6SIqSHGJUf8Dvs5qGQTKNbsdnTqfzIPGMK10NQiQXLseMOJ9T-c8zTpZoQ77O6VBLEFFT45K8TA25m2mS-Stqsn6N.jpg)

![Ninja Double Stack XL SL400UK 9.5L Air Fryer — 2](https://bargainpostbox.co.uk/i/BxCDJ-v-DX5le5oSkUVuxd-1QTGAx2T88t2M8fFeTMG3g58oA_wa-sdSAnUvpbUZ997dmhDCrqBNUluoUX3KMCe_UCswwcaxPwB7QRXcFE3Ya6Nw.jpg)

![Ninja Double Stack XL SL400UK 9.5L Air Fryer — 3](https://bargainpostbox.co.uk/i/dm587Ja12a0Lf7DHWG1jfbLRM7rAdrduEtypznQlccav7zmLbrcMM4dWgDIL-Pu1pmdwrHtcTAaSCNzyPtaFcjfs5srGqPiYfAuPChYmDt6Grcsp.jpg)

![Ninja Double Stack XL SL400UK 9.5L Air Fryer — 4](https://bargainpostbox.co.uk/i/ejI7dg54nh_hAr6jN9jeXATT1TQ8iKoCl_Edo1LGVGhmYNkDxcD1hvebknGvpeQwHyiw7uJh9kYgFLmg2a05xThhSV083YKBkY7zBoKboXhA3ce7.jpg)

![Ninja Double Stack XL SL400UK 9.5L Air Fryer — 5](https://bargainpostbox.co.uk/i/X_W-hpbjQkByHJDUWBfwOix_RatJ2gJoUYOkAJTvz6WdhE3OLEyWOIDmX5_y1u5pAZYLPkcOwJ9wwyMJ-91wB-hhTHtHVEBeCutSn5lRYV9bSdWk.jpg)

![Ninja Double Stack XL SL400UK 9.5L Air Fryer — 6](https://bargainpostbox.co.uk/i/MI_99Ily956U88bVTbztPS6my5X5DeINWFIJzyTsuOoe5oawqzfTEKyTUayL2aWFXrVIPJyezDGs5Uiu8Cpv4wifjgCbMaeEb-CGR25j0XcBKmNe.jpg)

![Ninja Double Stack XL SL400UK 9.5L Air Fryer — 7](https://bargainpostbox.co.uk/i/5rUVLZuZCkijnTLXjFoY14784OWLf-1_04jZccT2DEOaolj6E7WNsa2eeOM6QDD3l9zQaCKsGYB7E9l6urCGKVIBYWt0q-QR5umRVbvVQwsDOZ9b.jpg)