If you are looking for the Best Air Fryer for a busy UK kitchen, Ninja is one of the brands worth considering. Its range covers everything from relatively compact dual-drawer machines to large-capacity models designed for family meals and entertaining.
But choosing between the Ninja Foodi MAX Dual Zone AF400UK, Foodi FlexDrawer AF500UK, Double Stack XL SL400UK, Double Stack SL300UK and Foodi Dual Zone AF200UK is not as straightforward as it first appears. They use different layouts, capacities and cooking systems, and the biggest model is not automatically the best choice for every household.
This guide compares the five models in detail, looking at capacity, cooking flexibility, countertop space, cleaning, energy use, controls, value and suitability for different types of buyer.
Specification and price note: specifications below are based primarily on current UK manufacturer information, with retailer listings used where appropriate. Prices are UK snapshots checked around late August/early September 2026 and can change with promotions. Always check the latest price before purchasing.
If you want to compare these models with other brands first, our guide to the best air fryers in the UK is a useful starting point.
Quick Verdict: Which Ninja Air Fryer Is Best?
For most households, there are four particularly strong choices, depending on what you need.
- Best overall: Ninja Foodi FlexDrawer AF500UK
- Best for families and value: Ninja Foodi MAX Dual Zone AF400UK
- Best for small kitchens: Ninja Double Stack XL SL400UK
- Best for couples and smaller households: Ninja Foodi Dual Zone AF200UK
- Best compact stacked option: Ninja Double Stack SL300UK
The AF500UK is the most flexible machine here because its 10.4-litre drawer can operate as one large cooking zone or be divided into two separate zones. The AF400UK, meanwhile, remains arguably the easier recommendation if you want large capacity and straightforward dual-zone cooking without paying extra for the FlexDrawer concept.
The SL400UK is particularly interesting if countertop width is your main limitation because its two cooking drawers are stacked vertically rather than positioned side by side.
Ninja Air Fryer Comparison Table
| Model | Capacity | Zones / Baskets | Design | Cooking Functions | Dimensions | Weight | Temperature Range | Dishwasher-Safe Parts | Best Suited To | Key Advantage | Main Drawback | Typical UK Price* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ninja Foodi MAX AF400UK | 9.5L | 2 x 4.75L | Side-by-side | 6 | H32.5 x W41.5 x D27cm | 8.8kg | 40–240°C depending on function | Yes | Families | Excellent dual-zone cooking | Wide countertop footprint | ~£180–£240 |
| Ninja Foodi FlexDrawer AF500UK | 10.4L | 1 x 10.4L or 2 x 5.2L | Convertible drawer | 7 | H32.7 x W49.6 x D31.6cm** | 9.4kg | 40–240°C depending on function | Yes | Families, flexible cooking | One huge zone or two zones | Large footprint | ~£200–£270 |
| Ninja Double Stack XL SL400UK | 9.5L | 2 x 4.75L | Vertical | 6 | H38.5 x W28 x D47cm | 10.3kg | 40–240°C depending on function | Yes | Large families, smaller worktops | Large capacity in a narrow footprint | Tall and relatively deep | ~£200–£270 |
| Ninja Double Stack SL300UK | 7.6L | 2 x 3.8L | Vertical | 6 | H38.5 x W28.6 x D45.2cm | 9.76kg | 40–240°C depending on function | Yes | Small families, compact kitchens | Space-saving design | Less capacity than SL400/AF400 | ~£200–£230 |
| Ninja Foodi Dual Zone AF200UK | 7.6L | 2 x 3.8L | Side-by-side | 4 | H31.5 x W38 x D33cm | 8.2kg | 180–240°C listed by retailer | Yes | Couples, smaller families | Simple dual-zone operation | Fewer cooking functions | ~£130–£160 |
*Prices are indicative rather than fixed retail prices and vary by retailer and promotion.
**Ninja’s current product specification lists the AF500UK at H32.7 x W49.6 x D31.6cm, while its support FAQ gives a different external measurement. The product specification has been used in this comparison, so buyers should check the manufacturer’s current listing when planning countertop space.
The AF400UK’s official specification is 9.5 litres, 8.8kg, 2470W and H32.5 x W41.5 x D27cm. The AF500UK is 10.4 litres and 9.4kg, with seven cooking functions including Prove.
The SL400UK and SL300UK both offer six cooking functions and a temperature range running from 40°C for Dehydrate to 240°C for Max Crisp, while their other main cooking modes reach up to 210°C.
1. Ninja Foodi MAX Dual Zone AF400UK Review
Best Ninja Air Fryer for Families
The Ninja Foodi MAX Dual Zone AF400UK is one of the most established models in this comparison and remains an excellent choice for households that regularly cook two foods at the same time.
It has a 9.5-litre capacity, split between two independent 4.75-litre drawers. Ninja says the capacity is suitable for eight or more people and each drawer can accommodate a large amount of food.
Design and build quality
The AF400UK uses Ninja’s familiar side-by-side drawer design. It is substantial, but its relatively low height makes it easier to position beneath many kitchen cabinets than a tall stacked machine.
At 32.5cm high, 41.5cm wide and 27cm deep, it has a fairly broad footprint. The advantage is that both drawers are immediately accessible at the front.
Its 8.8kg weight also means it is not an appliance you will necessarily want to move around every day.
DualZone cooking
This is where the AF400UK makes the most sense.
Each drawer can have its own cooking function, temperature and cooking time. The SYNC function allows two foods requiring different settings to finish together, while MATCH can duplicate settings across both drawers when you want to cook a larger quantity of the same food.
For example, you could cook chicken in one drawer and chips in the other, even if the two foods require different cooking times.
Cooking functions
The AF400UK has six functions:
- Air Fry
- Max Crisp
- Roast
- Bake
- Reheat
- Dehydrate
The temperature range varies according to the selected function. Max Crisp reaches 240°C, while Air Fry, Roast, Reheat and Bake can reach up to 210°C; Dehydrate operates at the lower end of the range.
Cooking performance
The AF400UK’s greatest strength is consistency when preparing a complete meal. The separate heating elements and fans allow the two zones to operate independently.
Independent testing has also found strong cooking results, particularly when using the two drawers for different foods.
It is particularly useful for family meals where one drawer can handle a main course and the other a side dish.
Ease of use
The controls are straightforward, and the SYNC and MATCH functions remove much of the timing calculation involved in preparing two different foods.
You do not need to preheat the AF400UK, according to Ninja.
Cleaning
The drawers and crisper plates are dishwasher safe, making post-meal cleaning relatively simple. Ninja nevertheless recommends hand washing the components where possible to extend their life.
Energy efficiency
Ninja claims the AF400UK can use up to 65% less energy than an oven, with the comparison based on specific cooking tests. That should be treated as a manufacturer test result rather than a guarantee of savings for every recipe or household.
Noise
Ninja does not publish a standard dB noise figure for this model in the specifications reviewed. Like most high-powered air fryers, you should expect to hear the fan and airflow during operation.
Countertop footprint
The main disadvantage is width. The side-by-side layout is convenient but consumes more horizontal worktop space than the Double Stack models.
Pros
- Large 9.5L capacity
- Two independent cooking zones
- Excellent for family meals
- SYNC and MATCH functions
- Six cooking modes
- Dishwasher-safe drawers and crisper plates
- Strong balance between capacity and price
Cons
- Takes considerable horizontal countertop space
- Heavy compared with smaller air fryers
Best for
Families, batch cooking and people who regularly prepare two different foods simultaneously.
Who should avoid it?
If your main problem is limited worktop width, the SL400UK is a better option. If you mostly cook for one or two people, the AF200UK may make more sense.
Value for money
At around £180–£240 depending on retailer and promotion, the AF400UK offers a compelling combination of capacity and dual-zone functionality. Ninja currently lists the model at £179.99, while retailer pricing can differ.
Buy Now
Verdict: One of the safest all-round choices in this group and arguably the best value option for larger households.
2. Ninja Foodi FlexDrawer AF500UK Review
Best Ninja Air Fryer for Flexibility
The Ninja Foodi FlexDrawer AF500UK takes the dual-zone concept further.
Instead of permanently having two separate baskets, it uses a single large 10.4-litre MegaZone drawer with a removable divider.
With the divider installed, it effectively becomes two independent 5.2-litre zones. Remove the divider and you have one large cooking area.
Design and build quality
The AF500UK is a large countertop appliance, but its convertible drawer is its defining feature.
It weighs approximately 9.4kg and has a 2470W power rating. The manufacturer lists seven cooking functions and dishwasher-safe components.
FlexDrawer design
This is the model to consider if you frequently switch between different types of cooking.
With the divider in place, you can prepare two foods independently.
Without it, you can cook larger items that would be awkward in two conventional drawers.
That makes the AF500UK more adaptable than the AF400UK for users who regularly cook whole joints, larger portions or one large tray-style meal.
Cooking functions
The seven functions are:
- Max Crisp
- Air Fry
- Roast
- Reheat
- Dehydrate
- Bake
- Prove
The Prove function is an unusual addition that allows the appliance to create an environment for dough to rise.
Its maximum temperature reaches 240°C on Max Crisp, while Air Fry can operate from 150°C to 240°C. Other functions have their own temperature ranges.
Cooking flexibility
This is arguably the AF500UK’s biggest advantage.
The AF400UK gives you two separate drawers. The AF500UK gives you two zones or one large zone.
That distinction matters.
If you are cooking a large roast or a sizeable family meal, the full-width MegaZone can be more convenient. If you are making chicken and chips, install the divider and use the two-zone setup.
Cooking performance
The combination of high capacity and independent zones makes the AF500UK highly suitable for larger meals.
Ninja states that the MegaZone can accommodate a 2kg chicken or up to 1.4kg of fries.
As with all large air fryers, however, capacity should not be confused with the amount of food that can be spread into a single layer. Overfilling can restrict airflow and affect browning.
Ease of use
The digital controls are straightforward, although the FlexDrawer introduces more options than the simpler AF200UK.
The main learning point is understanding when to use the divider and when to remove it.
Cleaning
The drawer, divider and crisper plates are dishwasher safe. Ninja recommends hand washing where practical to help prolong the life of the components.
Energy efficiency
Ninja currently advertises up to 45% less energy use than an oven for the AF500UK, based on its own testing methodology. As with all manufacturer energy comparisons, real-world consumption depends on what you cook and what appliance you are comparing against.
Countertop footprint
This is where the AF500UK loses some ground.
Its large drawer requires a substantial amount of worktop width and depth. It is not the obvious choice for a narrow kitchen.
Pros
- Huge 10.4L capacity
- Converts between one large zone and two zones
- Seven cooking functions
- Includes Prove
- Excellent family flexibility
- Dishwasher-safe components
- Useful for both everyday meals and larger dishes
Cons
- Large countertop footprint
- More expensive than simpler Ninja models
Best for
Families, entertainers and cooks who want maximum flexibility.
Who should avoid it?
Buyers with very limited worktop space or people who mainly cook small portions may be paying for capacity they rarely use.
Value for money
With current UK prices around £200–£270, the AF500UK commands a premium over the AF200UK and can cost more than the AF400UK. The extra money makes most sense if you will actually use the convertible MegaZone.
Buy Now
Verdict: The most versatile Ninja in this comparison and our Best Ninja Air Fryer overall for buyers who value flexibility above everything else.
3. Ninja Double Stack XL SL400UK Review
Best Ninja Air Fryer for Small Kitchens and Large Families
The Ninja Double Stack XL SL400UK solves a different problem from the AF400UK and AF500UK.
Rather than placing two drawers beside each other, Ninja stacks them vertically.
The result is a 9.5-litre dual-zone air fryer with a narrower worktop footprint.
Vertical design
The SL400UK measures approximately 38.5cm high, 28cm wide and 47cm deep and weighs 10.3kg.
It is therefore considerably taller than the AF400UK but substantially narrower.
That can make a major difference in a kitchen where width is limited.
However, depth is still important. A small countertop does not automatically mean a small appliance footprint.
Capacity
The SL400UK has 9.5 litres in total, divided between two 4.75-litre drawers.
That is the same headline capacity as the AF400UK.
Ninja rates it for up to eight people and says each drawer can accommodate a 1.4kg roast chicken.
Cooking functions
It offers:
- Air Fry
- Max Crisp
- Roast
- Bake
- Reheat
- Dehydrate
The temperature range extends from 40°C to 240°C depending on function.
Double Stack cooking
The biggest difference is that the SL400UK includes stacked meal racks, allowing additional layers of food within the drawers.
Ninja says the appliance can cook four foods at once using the racks and its Double Stack design.
This can be useful for meals where you want several smaller items rather than one large piece of food.
SYNC and MATCH
The SL400UK supports different cooking settings in each drawer and uses SYNC to finish the two zones together.
MATCH can be used when you want the same settings in both drawers.
This makes the basic dual-zone workflow similar to the AF400UK.
Space-saving advantages
This is where the SL400UK really stands out.
Ninja says the design is 30% slimmer than the AF400UK, allowing it to deliver 9.5 litres without requiring the same width.
For a narrow worktop, that can be more valuable than having the lowest possible height.
Cleaning
The drawers and crisper plates are dishwasher safe, while the included racks can also be cleaned according to the manufacturer’s instructions.
Energy efficiency
Ninja claims up to 55% less energy use than an oven under its stated testing conditions.
Pros
- 9.5L capacity
- Narrow vertical design
- Two independent cooking zones
- Four-layer cooking capability with racks
- Six functions
- SYNC and MATCH
- Dishwasher-safe drawers and crisper plates
- Excellent option for large families with limited worktop width
Cons
- Tall design
- 47cm depth still requires planning
Best for
Large families that need capacity but cannot spare much horizontal countertop space.
Who should avoid it?
If you have plenty of width and prefer straightforward side-by-side drawers, the AF400UK is arguably easier to live with.
Value for money
Prices fluctuate considerably, but current UK retailer listings have put the SL400UK around £200–£270. Currys recently listed it at £199.99, while Argos has also listed the model around £270.
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Verdict: An excellent space-conscious alternative to the AF400UK, particularly for larger households.
4. Ninja Double Stack SL300UK Review
Best Compact Ninja Dual-Zone Air Fryer
The Ninja Double Stack SL300UK takes the same basic vertical approach as the SL400UK but reduces capacity to 7.6 litres.
It is therefore a useful middle ground for households that want dual-zone cooking without moving up to a 9.5-litre machine.
Vertical stacked design
The SL300UK has two 3.8-litre drawers stacked vertically.
Its official product information lists dimensions around H38.5 x W28.6 x D45.2cm and a weight of 9.76kg.
The narrower width is its biggest selling point.
Capacity and basket configuration
At 7.6 litres, the SL300UK sits between compact single-basket air fryers and the larger 9.5–10.4-litre models.
Ninja describes it as suitable for up to six people.
For a couple or small family, that gives you useful capacity without stepping into the largest machines.
Cooking functions
The SL300UK has six programmes:
- Air Fry
- Max Crisp
- Roast
- Bake
- Reheat
- Dehydrate
The maximum temperature is 240°C on Max Crisp, while the other principal cooking modes reach up to 210°C.
Cooking performance
Its two independently controlled zones allow different foods to be cooked at different temperatures and times.
The included racks also allow food to be arranged across multiple levels.
This gives the SL300UK more flexibility than a basic two-basket fryer of similar capacity.
Ease of use
The controls are relatively straightforward, although the stacked layout means users need to become familiar with which drawer is being adjusted.
That is a minor learning curve rather than a fundamental problem.
Cleaning
The drawers and crisper plates are dishwasher safe. Ninja also recommends hand washing components where practical to preserve their condition.
Countertop footprint
The SL300UK is particularly attractive when width matters.
Its vertical design uses height rather than spreading two drawers across the countertop.
It still needs sufficient ventilation around the appliance, however, so you should not squeeze it into a cupboard or directly against surrounding objects.
Pros
- Space-saving vertical design
- 7.6L capacity
- Two independent drawers
- Six cooking functions
- Four-layer cooking with racks
- SYNC capability
- Dishwasher-safe parts
- Suitable for smaller families
Cons
- Taller than traditional dual-drawer models
- Smaller capacity than SL400UK and AF400UK
Best for
Small families and kitchens where horizontal countertop space is limited.
Who should avoid it?
If you regularly cook for eight or more people, the extra capacity of the SL400UK or AF500UK is likely to be more useful.
Value for money
Ninja’s current listing is around £199.99, while the model has previously been offered closer to £230.
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Verdict: A strong choice when countertop width is more important than maximum capacity.
5. Ninja Foodi Dual Zone AF200UK Review
Best Ninja Air Fryer for Couples
The Ninja Foodi Dual Zone AF200UK is the simplest model in this five-product comparison.
Its 7.6-litre capacity is divided between two 3.8-litre drawers, making it smaller than the AF400UK while retaining the key benefit of independent cooking zones.
Design and build quality
The AF200UK has a traditional side-by-side layout and weighs approximately 8.2kg.
Ninja lists dimensions of H31.5 x W38 x D33cm and a 2400W power rating.
It is therefore easier to accommodate than the larger AF400UK, although the depth is greater.
Dual-basket configuration
Each drawer operates independently, so you can prepare different foods using different settings.
The SYNC function lets both foods finish at the same time, while MATCH duplicates the same cooking settings across both drawers.
Cooking functions
The AF200UK has four functions:
- Air Fry
- Max Crisp
- Roast
- Reheat
This is considerably simpler than the six functions offered by the AF400UK, SL300UK and SL400UK.
That is not necessarily a weakness.
If you mainly want to air fry chips, chicken, vegetables, fish and similar everyday foods, you may not need a long list of additional programmes.
Cooking performance
The two independent drawers make it especially practical for couples who want to prepare a main and side simultaneously.
Ninja says each drawer can accommodate up to 1kg of fries or a 1.6kg chicken.
Ease of use
The AF200UK is arguably the easiest model here to understand.
There are fewer functions, the two drawers work independently, and the SYNC/MATCH system is straightforward.
Cleaning
The drawers and crisper plates are dishwasher safe, which makes everyday cleaning easier.
Countertop footprint
At 38cm wide and 33cm deep according to Ninja’s product specification, it is smaller than the AF400UK in width but not dramatically smaller in overall footprint.
Couples and small families
This is where the AF200UK makes the most sense.
A couple can use one drawer for a small portion rather than heating the entire appliance. For a family of three or four, the 7.6-litre capacity can also be sufficient.
Pros
- 7.6L capacity
- Two independent cooking zones
- Simple controls
- SYNC and MATCH
- Four useful cooking functions
- Dishwasher-safe parts
- Lower price than larger Ninja models
- Good choice for couples
Cons
- Only four cooking functions
- Less capacity than AF400UK, SL400UK and AF500UK
Best for
Couples, smaller families and first-time dual-zone buyers.
Who should avoid it?
If you regularly entertain or cook large meals, the AF400UK, SL400UK or AF500UK will give you more usable capacity.
Value for money
Current UK listings have placed the AF200UK around £130–£160, making it the most affordable option in this comparison. Ninja has listed it around £130–£150 depending on the promotion, while Argos has recently shown £159.99.
Buy Now
Verdict: The best value choice for buyers who want dual-zone cooking without paying for a larger premium model.
Feature-by-Feature Comparison
1. Capacity
The ranking is straightforward:
- AF500UK – 10.4L
- AF400UK – 9.5L
- SL400UK – 9.5L
- AF200UK – 7.6L
- SL300UK – 7.6L
However, capacity alone does not determine how useful an air fryer will be.
The AF500UK’s 10.4 litres is particularly flexible because the entire area can be used as one zone.
2. Cooking Flexibility
Winner: AF500UK
The FlexDrawer is the only model here that can change between one large cooking zone and two separate zones.
The AF400UK, SL400UK, SL300UK and AF200UK all have permanently separate drawers.
3. Cooking Performance
All five use Ninja’s high-speed hot-air cooking approach, but performance depends heavily on how much food you put into each drawer.
For everyday family meals, the AF400UK and AF500UK are particularly strong choices because of their large capacity and independent zones.
The Double Stack models add another dimension by allowing food to be arranged on multiple levels.
4. Dual-Zone Cooking
Winner: AF400UK / AF500UK
The AF400UK offers an excellent traditional dual-zone system.
The AF500UK goes further by allowing two zones or one large zone.
If you specifically want two conventional independent baskets, the AF400UK is simpler.
If you want maximum flexibility, the AF500UK wins.
5. Single-Zone Cooking
Winner: AF500UK
This is one of the easiest categories.
The AF500UK’s divider can be removed to create a 10.4-litre MegaZone.
None of the other four models provides the same full-width convertible arrangement.
6. Family Cooking
Winner: AF400UK / AF500UK / SL400UK
For larger families, all three offer around 9.5 litres or more.
The choice comes down to layout:
- AF400UK: easiest conventional dual-drawer layout
- AF500UK: most flexible
- SL400UK: best when width is limited
7. Cooking for Couples
Winner: AF200UK
A 7.6-litre capacity is more than enough for many couples, particularly because either drawer can be used independently.
The larger models can obviously cook for two, but they occupy more space and cost more.
8. Countertop Space
Best width-saving design: SL400UK
The SL400UK and SL300UK use vertical space rather than spreading two drawers horizontally.
That makes them particularly attractive for narrow countertops.
However, they are taller and deeper, so measure your available area rather than assuming “vertical” means universally smaller.
9. Vertical vs Horizontal Design
Vertical: SL400UK and SL300UK
Advantages:
- Narrower worktop footprint
- Two cooking zones
- Multi-layer cooking
- Good capacity for the width
Disadvantages:
- Taller
- Deeper than some conventional models
- Stacked layout takes some getting used to
Horizontal: AF400UK, AF500UK and AF200UK
Advantages:
- Easy access to both drawers
- Familiar layout
- Good visibility of each cooking zone
Disadvantages:
- Requires more horizontal worktop space
- Larger models can dominate a countertop
10. Ease of Use
Simplest: AF200UK
The AF200UK’s four functions make it particularly straightforward.
The AF400UK adds more cooking options without becoming difficult to understand.
The AF500UK is the most flexible but consequently has more to learn.
11. Cleaning
All five have dishwasher-safe components, which puts them relatively close in this category.
The AF500UK has an additional divider, while the Double Stack models include racks, meaning there are more individual components to clean.
For simplicity, the AF200UK has an advantage.
12. Energy Efficiency
Ninja publishes “up to” energy-saving figures for these models, but the figures are based on specific comparisons and should not be treated as guaranteed household savings.
The manufacturer currently claims:
- AF400UK: up to 65% energy saving versus an oven
- AF500UK: up to 45%
- SL400UK: up to 55%
- SL300UK: up to 60%
- AF200UK: up to 75%
These figures are not directly comparable as a universal efficiency league table because Ninja’s testing conditions and comparison models differ.
For more practical advice on choosing an efficient appliance, our air fryer buying guide covers capacity, cooking style and energy considerations.
13. Noise
Ninja does not provide comparable published dB figures for all five models in the specifications reviewed.
Therefore, it would be misleading to rank them numerically for noise.
Expect audible fan noise from all five while operating, particularly at high temperatures.
14. Build Quality
All five have substantial plastic housings, non-stick drawers and crisper plates designed for regular domestic use.
The larger models are heavier because of their capacity and construction.
The AF400UK has a particularly established design, while the AF500UK and Double Stack models introduce more complex drawer arrangements.
AF400UK vs AF500UK
These are probably the two models most buyers will compare.
Capacity
- AF400UK: 9.5L
- AF500UK: 10.4L
The AF500UK has the larger overall capacity.
Basket design
The AF400UK has two permanently separate 4.75-litre drawers.
The AF500UK uses one 10.4-litre drawer that can be divided into two 5.2-litre zones.
Cooking flexibility
Winner: AF500UK
The removable divider gives it a clear advantage for large items and full-width cooking.
Countertop requirements
Winner: AF400UK
Both are substantial appliances, but the AF500UK’s current product specification gives it a larger overall footprint.
Family suitability
Both are excellent for families.
The AF500UK is better if you frequently switch between cooking one large meal and two separate foods.
The AF400UK is better if you almost always want two independent drawers.
Ease of use
Winner: AF400UK
Its fixed two-drawer layout is simpler.
Versatility
Winner: AF500UK
The ability to use the MegaZone as one large area is the major differentiator.
Value
Winner: AF400UK for most buyers
If you do not need the FlexDrawer, spending less on the AF400UK can make more sense.
SL400UK vs SL300UK
The two Double Stack models share the same basic philosophy but target different capacities.
| Feature | SL400UK | SL300UK |
|---|---|---|
| Capacity | 9.5L | 7.6L |
| Drawer capacity | 4.75L each | 3.8L each |
| Functions | 6 | 6 |
| Design | Vertical | Vertical |
| Width | 28cm | ~28.6cm |
| Depth | 47cm | ~45.2cm |
| Weight | 10.3kg | 9.76kg |
| Best for | Up to 8 people | Up to 6 people |
Choose the SL400UK if:
- You regularly cook for a large family
- You want 9.5L capacity
- You entertain
- You want four-layer cooking with more room
Choose the SL300UK if:
- You usually cook for up to six people
- You want a smaller capacity
- You find the SL400UK too expensive
- Countertop width is important
The SL300UK is not simply a cheaper SL400UK; it is a better fit when 7.6 litres is enough for your household.
AF200UK vs AF400UK
The biggest difference is capacity.
- AF200UK: 7.6L
- AF400UK: 9.5L
Both use two independent drawers, but the AF400UK provides 25% more capacity than the 7.6-litre class. Ninja specifically positions the AF400UK as a larger-capacity model for bigger households.
AF200UK is better for:
- Couples
- Smaller families
- First-time dual-zone buyers
- Lower budgets
- Everyday portions
AF400UK is better for:
- Families
- Batch cooking
- Entertaining
- Larger portions
- People who frequently cook a main and several sides
If the price difference is relatively small during a promotion, the AF400UK can be the stronger long-term purchase.
SL400UK / SL300UK vs AF400UK / AF200UK
The fundamental choice here is vertical versus horizontal.
Traditional dual-basket models
The AF200UK and AF400UK put the two cooking drawers next to each other.
This makes them intuitive and gives easy access to both zones.
They are particularly good if you have enough worktop width.
Vertical Double Stack models
The SL300UK and SL400UK stack the drawers.
Their principal advantage is worktop width.
They are ideal for kitchens where a conventional side-by-side dual-zone machine would take up too much space.
The trade-off is height and depth, plus a slightly different cooking workflow.
For more options in this category, see our guide to the best dual-basket air fryers.
Which Ninja Air Fryer Should You Buy?
For Couples
Choose: AF200UK
The 7.6-litre capacity and two independent drawers provide plenty of flexibility without the cost and bulk of the largest models.
For Small Families
Choose: AF200UK or SL300UK
Choose the AF200UK if you prefer a conventional layout.
Choose the SL300UK if countertop width is your main concern.
For Large Families
Choose: AF400UK or SL400UK
Both offer 9.5 litres.
The AF400UK is better for conventional side-by-side operation.
The SL400UK is better when worktop width is limited.
For Busy Households
Choose: AF400UK
Its SYNC function is particularly useful when different foods need different cooking times but you want everything ready together.
For Small Kitchens
Choose: SL400UK
Its vertical layout provides 9.5 litres without taking up as much horizontal space as a conventional large dual-zone model.
For Limited Countertop Width
Choose: SL300UK or SL400UK
The Double Stack design is the key advantage.
Choose between them based on how much food you normally prepare.
For Multiple Foods at Once
Choose: AF400UK, AF500UK or SL400UK
All three are designed around multi-food cooking.
The AF500UK offers the most flexibility because it can also become one large zone.
For Maximum Capacity
Choose: AF500UK
Its 10.4-litre MegaZone is the largest capacity in this comparison.
For Maximum Flexibility
Choose: AF500UK
The removable divider is difficult to beat.
For Budget-Conscious Buyers
Choose: AF200UK
It provides two-zone cooking without the price of the larger models.
For Premium Features
Choose: AF500UK
Seven cooking functions, the FlexDrawer and MegaZone make it the most feature-rich model in this five-product comparison.
Best Ninja Air Fryer by Category
| Category | Winner | Why |
|---|---|---|
| Best Ninja air fryer overall | AF500UK | Most flexible design and largest capacity |
| Best for families | AF400UK | Excellent capacity, dual zones and strong value |
| Best for couples | AF200UK | 7.6L capacity without the cost of larger models |
| Best for small kitchens | SL400UK | 9.5L capacity in a narrow vertical format |
| Best for large meals | AF500UK | 10.4L MegaZone |
| Best for flexible cooking | AF500UK | One large zone or two independent zones |
| Best for dual-zone cooking | AF400UK | Straightforward, proven two-drawer design |
| Best for countertop width | SL300UK | Narrow stacked format |
| Best value | AF200UK | Affordable entry into Ninja dual-zone cooking |
| Best premium option | AF500UK | Most versatile feature set |
Pros and Cons at a Glance
Ninja AF400UK
Pros
- Large 9.5L capacity
- Excellent dual-zone cooking
- SYNC and MATCH
- Six functions
- Dishwasher-safe parts
Cons
- Wide countertop footprint
- Heavy
- No full-width MegaZone
Ninja AF500UK
Pros
- Largest 10.4L capacity
- Convertible MegaZone
- Seven functions
- Highly flexible
- Excellent for large families
Cons
- Expensive
- Large countertop footprint
- More complicated than simpler models
Ninja SL400UK
Pros
- 9.5L capacity
- Narrow vertical footprint
- Four-layer cooking
- Six functions
- Dual independent zones
Cons
- Tall
- Deep
- Heavy
- More expensive than SL300UK
Ninja SL300UK
Pros
- Space-saving vertical design
- 7.6L capacity
- Six functions
- Dual zones
- Multi-layer cooking
Cons
- Less capacity than SL400UK
- Tall
- Can take time to get used to
Ninja AF200UK
Pros
- Affordable
- 7.6L capacity
- Two independent drawers
- Simple controls
- Dishwasher-safe parts
Cons
- Only four functions
- Smaller capacity
- Not ideal for large families
Final Ranking: The 5 Best Ninja Air Fryers UK
1. Ninja Foodi FlexDrawer AF500UK — Best Overall
The AF500UK takes first place because it offers something none of the other models can: a large 10.4-litre cooking area that can be divided into two independent zones.
It is the best option for households that want maximum flexibility.
Main strength: Convertible MegaZone design
Main weakness: Large footprint and higher price
Ideal user: Families and enthusiastic home cooks
Overall value: Excellent if you will use the FlexDrawer regularly
2. Ninja Foodi MAX Dual Zone AF400UK — Best Family Value
The AF400UK comes very close to the top spot.
It has a large 9.5-litre capacity, two independent drawers, six cooking functions and excellent SYNC/MATCH functionality.
For buyers who do not need a single full-width drawer, it may actually be the smarter purchase than the AF500UK.
Main strength: Excellent balance of capacity, simplicity and price
Main weakness: Horizontal worktop footprint
Ideal user: Families
Overall value: Excellent
3. Ninja Double Stack XL SL400UK — Best Space-Saving Family Model
The SL400UK earns third place because it combines 9.5 litres of capacity with a much narrower footprint.
Its stacked layout is particularly useful in smaller kitchens.
Main strength: Large capacity without a wide dual-drawer footprint
Main weakness: Tall and deep
Ideal user: Large families with limited countertop width
Overall value: Very good
4. Ninja Foodi Dual Zone AF200UK — Best Value
The AF200UK is not the most advanced model here, but that is precisely why it remains appealing.
It delivers the fundamental benefit of dual-zone cooking at a lower price.
Main strength: Affordable two-zone cooking
Main weakness: Only four cooking functions
Ideal user: Couples and smaller families
Overall value: Excellent when bought at a good price
5. Ninja Double Stack SL300UK — Best Compact Alternative
The SL300UK finishes fifth, not because it is poor, but because the other models offer stronger combinations of capacity, price or flexibility.
It remains a very sensible option for households where worktop width is the deciding factor.
Main strength: Narrow vertical design
Main weakness: Less capacity than SL400UK
Ideal user: Small families with limited countertop width
Overall value: Good
Is the Most Expensive Ninja Air Fryer Automatically the Best?
No.
The AF500UK is the most flexible model here, but that does not mean everyone should buy it.
A couple may be better served by the AF200UK.
A family wanting two straightforward drawers may prefer the AF400UK.
A large family with a narrow worktop may find the SL400UK more practical.
That is why choosing the Best Air Fryer should start with your household size, available countertop space and typical cooking habits rather than simply choosing the largest model.
FAQ: Best Ninja Air Fryers UK
1. Which Ninja air fryer is best overall?
The Ninja Foodi FlexDrawer AF500UK is the best overall in this comparison because of its 10.4-litre capacity and ability to switch between one large MegaZone and two separate cooking zones.
However, the AF400UK offers better value if you mainly want two conventional drawers.
2. Which Ninja air fryer is best for families?
The AF400UK is one of the best family choices because its 9.5-litre capacity and two independent drawers make it easy to prepare mains and sides simultaneously.
The AF500UK and SL400UK are also excellent for larger households.
3. Is the AF400UK better than the AF500UK?
It depends on your requirements.
Choose the AF400UK for a simpler two-drawer setup and potentially better value.
Choose the AF500UK if you want the flexibility of a full-width 10.4-litre cooking zone.
4. Is the Ninja Double Stack XL worth buying?
Yes, particularly if countertop width is limited.
The SL400UK offers 9.5 litres while using a vertical design that is substantially narrower than conventional side-by-side dual-zone machines.
5. What is the difference between the SL300UK and SL400UK?
The biggest difference is capacity.
The SL300UK has 7.6 litres, while the SL400UK has 9.5 litres. Both have six cooking functions and the same basic stacked concept.
6. Is the AF200UK suitable for a family?
Yes, particularly for smaller families.
Its 7.6-litre capacity is suitable for many households of around three to five people, although larger families may benefit from the additional capacity of the AF400UK or AF500UK.
7. Which Ninja air fryer takes up the least countertop space?
The SL300UK has the narrowest width of the five at around 28.6cm in Ninja’s product specification.
The SL400UK is also very narrow at around 28cm, but it is deeper and larger overall.
8. Which Ninja air fryer has the largest capacity?
The AF500UK, with 10.4 litres.
It can operate as one large MegaZone or as two 5.2-litre zones when the divider is installed.
9. Are Ninja dual-zone air fryers worth buying?
They can be, particularly if you regularly cook two different foods.
The main benefit is not simply capacity; it is being able to use different temperatures, cooking times and programmes and have the foods finish together.
10. What should I look for when choosing the Best Air Fryer?
Start with:
- Household size
- Available countertop space
- Single or dual-zone cooking
- Basket capacity
- Cooking functions
- Cleaning requirements
- Energy consumption
- Price
- How often you will actually use the additional features
A large model is only better if you genuinely need its extra capacity.
11. Is the AF500UK good for large meals?
Yes. Its 10.4-litre MegaZone is the largest capacity in this comparison and can be used as one large cooking area. It can also be divided into two independent zones.
12. Which Ninja air fryer is best for a small kitchen?
The SL300UK or SL400UK are the strongest options if horizontal worktop space is the main limitation.
Their stacked drawers use vertical space rather than requiring two wide drawers side by side.
13. Which Ninja air fryer offers the best value?
For couples and smaller households, the AF200UK offers the strongest value.
For larger families, the AF400UK is arguably the better value because of its 9.5-litre capacity and six cooking functions.
14. Which Ninja air fryer is easiest to clean?
All five have dishwasher-safe drawers and crisper plates.
The AF200UK has fewer components and functions, so it is arguably the simplest for routine use. The AF500UK and Double Stack models have additional components that provide greater flexibility but also create more parts to clean.
Final Verdict
The five Ninja air fryers in this comparison are designed for noticeably different buyers.
Choose the AF500UK if you want the greatest cooking flexibility and maximum capacity.
Choose the AF400UK if you want an excellent family air fryer with two straightforward independent drawers and strong value.
Choose the SL400UK if you need large capacity but have limited countertop width.
Choose the SL300UK if you want a smaller stacked dual-zone machine for a compact kitchen.
Choose the AF200UK if you are a couple or smaller household looking for an affordable, uncomplicated dual-basket air fryer.
For more UK-focused comparisons, reviews, buying advice and air fryer recommendations, you can use Best Air Fryer as a starting point. Prices and promotions can change quickly, so check the latest retailer listings before making your final purchase.
Ultimately, there is no single Ninja model that is perfect for everyone. The Best Air Fryer is the one whose capacity, layout and cooking features match the way you actually prepare meals.
