The Ninja Double Stack XL SL400UK is the best air fryer for most UK households. It gives you two independent 4.75-litre drawers in a body only 28cm wide, balancing useful family capacity with a footprint that works in more kitchens. Choose a different model only when you need one broad drawer, a simpler single basket, a PFAS-free ceramic dual layout or steam cooking.
Quick Navigation
- Quick picks
- How we chose
- Compare the five best air fryers
- Our air fryer recommendations
- Head-to-head decisions
- How to choose the right air fryer
- The bottom line
- Frequently asked questions
Quick Picks
- Best overall: Ninja Double Stack XL SL400UK — narrow two-zone cooking.
- Best single drawer: Cosori TurboBlaze 6L — couples and smaller families.
- Best flexible family option: Ninja Foodi FlexDrawer AF500UK — bulky food and mixed family meals.
- Best large asymmetric dual: Instant Vortex Dual 11L PFAS-Free — a large main plus smaller side.
- Best premium steam model: Philips 5000 Series Dual Basket with Steam — steam, air fry and mixed-method meals.
How We Chose
Kitchen Gear UK has not physically tested these machines. This research-led assessment compares documented UK specifications, current model availability, basket layout, worktop footprint, cleaning requirements, warranty terms and the decision each product helps a buyer make. We do not infer cooking performance from a review score or present manufacturer claims as our own experience.
The shortlist deliberately avoids several near-duplicates. The Ninja CRISPi is a clever glass-container system but has a narrower audience; the Ninja AG651UK is primarily an indoor grill; and the Tower and Tefal overlap stronger single-drawer and asymmetric-dual choices. If budget is the main constraint, our best air fryers under £100 guide is the more useful shortlist.
Capacity is only a starting point. Drawer width, depth and shape determine whether food can sit in a useful layer. Our air fryer size guide explains how litres translate to household size and usable cooking area.
Compare the Five Best Air Fryers
| Model | Best for | Capacity | Layout | Main compromise |
|---|---|---|---|---|
| Ninja SL400UK | overall | 9.5L | Two stacked 4.75L drawers | The stacked body is deep and needs overhead clearance. |
| Cosori TurboBlaze | single drawer | 6L | One square drawer | One drawer cannot run two foods independently. |
| Ninja AF500UK | flexible family option | 10.4L | One MegaZone or two 5.2L zones | The wide body needs substantial worktop space. |
| Instant Vortex Dual 11L | large asymmetric dual | 11L | 7L and 4L drawers | It is both wide and deep, with a 2600W peak rating. |
| Philips 5000 Steam | premium steam model | 9L | 6L steam drawer plus 3L side drawer | Steam works in the larger basket and adds water-system maintenance. |
Our Air Fryer Recommendations
Best overall: Ninja Double Stack XL SL400UK
The SL400UK remains the best overall choice because its layout solves a common UK-kitchen problem. Two 4.75-litre drawers are stacked vertically in a body that Ninja specifies at 28cm wide, 47cm deep and 38.5cm high. It gives you two independent zones without the broad footprint of most dual-drawer machines.
Six functions cover Air Fry, Max Crisp, Roast, Bake, Reheat and Dehydrate. Two supplied racks add a second level inside each drawer, while Sync can finish different foods together and Match repeats one programme across both zones. Ninja lists dishwasher-safe removable parts and a two-year guarantee after registration.
- Buy it if: you want two useful cooking zones but cannot spare the width for a conventional side-by-side model.
- Skip it if: a 47cm-deep appliance or the required ventilation space will make your worktop awkward.
- Main compromise: The stacked layout saves width, but neither drawer can turn into one broad space for a large tray or joint.
Best single drawer: Cosori TurboBlaze 6L
The Cosori TurboBlaze is the strongest single-drawer option in this shortlist. Its 6-litre square basket is large enough for many couples and smaller families, while the 30cm-wide body is easier to accommodate than the dual-zone machines. It is the model to choose when you normally cook one food or one mixed basket rather than a main and side on separate settings.
Cosori specifies nine functions, a 30–230°C temperature range, five fan speeds and a dishwasher-safe basket. The DC motor and fan system are manufacturer features rather than proof of a particular cooking result, so the practical appeal is the combination of capacity, temperature range and compact footprint. The UK warranty is two years.
- Buy it if: you want a capable 6-litre drawer without paying for cooking zones you are unlikely to use.
- Skip it if: you regularly need two temperatures or want both parts of a meal to finish independently.
- Main compromise: The simple single-drawer format is easy to place and clean, but it cannot match the timing flexibility of two zones.
Best flexible family option: Ninja Foodi FlexDrawer AF500UK
The AF500UK earns its place because the removable divider changes the shape of the cooking area. Leave it in for two 5.2-litre zones with separate settings, or lift it out for one 10.4-litre MegaZone. That broad space is useful for tray-style meals, larger joints and foods that do not fit comfortably into a conventional drawer.
Ninja lists seven functions: Max Crisp, Air Fry, Roast, Bake, Reheat, Dehydrate and Prove. The drawer, divider and crisper plates are described as dishwasher-safe, and the registered guarantee runs for two years. The established appliance specification is approximately 49.6cm wide, 31.6cm deep and 32.7cm high, so width is the deciding constraint.
- Buy it if: you alternate between two-zone dinners and bulky food that needs one uninterrupted cooking space.
- Skip it if: nearly 50cm of appliance width would consume too much of your preparation area.
- Main compromise: Its basket is the most adaptable here, but the wide body is much harder to accommodate than the SL400UK.
Best large asymmetric dual: Instant Vortex Dual 11L PFAS-Free
Instant divides this 11-litre model into a 7-litre main basket and a 4-litre side basket. That uneven split suits a common meal pattern: a larger main in one side and vegetables, chips or a smaller portion in the other. The food-contact baskets and trays use a ceramic coating that Instant describes as PFAS-free.
The six cooking modes are Air Fry, Bake, Grill, Dehydrate, Roast and Reheat, with SyncCook and SyncFinish controls handling matched or differently timed dishes. Instant specifies dishwasher-safe drawers and trays, 43cm width, 41cm depth, 32cm height and an 8.9kg weight. Its 2600W rating is peak demand, not a statement of constant consumption.
- Buy it if: you want a genuinely large main drawer, a smaller side drawer and a documented PFAS-free ceramic coating.
- Skip it if: you normally cook one small portion or need an appliance with a narrow footprint.
- Main compromise: The 7L-plus-4L layout is practical, but the 43cm-wide and 41cm-deep body needs permanent space.
Best premium steam model: Philips 5000 Series Dual Basket with Steam
The Philips 5000 Series earns the premium position because steam changes what the machine can do. The 6-litre main basket supports steam, air frying and a combined steam-and-air-fry mode; the 3-litre side basket can cook a second food. That is a meaningful distinction for vegetables, fish, dumplings and meals where moisture matters.
Philips specifies 9 litres in total, 12 presets, a 40–200°C range, dishwasher-safe removable parts and a steam-clean function. The body measures 38.3cm wide, 44.4cm deep and 35.5cm high, with a 2750W peak rating. Manufacturer claims about fat, speed or energy use depend on named test foods and should not be treated as universal results.
- Buy it if: steaming is a cooking method you will use, rather than a premium feature you will try once.
- Skip it if: your routine is mainly frozen food, chips and reheating, where a simpler drawer gives better value.
- Main compromise: Steam is limited to the larger basket, and the water tank, steam path and descaling routine add maintenance.
Head-to-head: Which Air Fryer Should You Buy?
Ninja SL400UK or AF500UK?
Choose the SL400UK when width is your main constraint. Choose the AF500UK when you need one broad cooking area for bulky food. Both offer two-zone cooking, but the basket geometry is opposite: fixed stacked drawers versus a removable divider. Comparing litres without measuring the available worktop is the mistake to avoid.
Cosori TurboBlaze or a dual-zone fryer?
Pick the Cosori when you mainly cook one dish and want a simple 30cm-wide appliance. Pay for two zones only if you regularly use different times or temperatures. A second basket is valuable for a main and side, but it adds width, cleaning and controls that a smaller household may not need.
Instant Vortex Dual or Philips 5000 Steam?
The Instant gives you more capacity, a larger 7-litre main drawer and a documented PFAS-free ceramic coating. The Philips is the premium choice when steaming and steam-assisted cooking change what you will make. For ordinary air frying in large quantities, the Instant is the more direct fit; for mixed steam-and-crisp meals, choose Philips.
How to Choose the Right Air Fryer
Start with basket shape
A headline litre figure does not show whether food fits in one layer. A 4–6-litre drawer usually suits one or two people; larger households benefit from 7–11 litres or two zones. Wide baskets suit tray-style meals, while separate drawers are better when ingredients need different temperatures.
Measure the worktop in three directions
Measure width, depth and the gap below wall cupboards, then allow ventilation around the appliance. The SL400UK saves width but reaches 47cm deep. The AF500UK needs close to 50cm of width. The Instant is 43cm wide and 41cm deep, while the Philips is 38.3cm wide and 44.4cm deep. Leave room to pull out a hot drawer safely.
Decide whether two temperatures matter
Dual zones earn their space when a main and side require different settings. A single drawer is easier to clean and often makes more sense for one food or small batches. Our air fryer choosing guide takes you through the trade-offs in more detail.
Check cleaning, coating and warranty details
Dishwasher-safe parts reduce effort, although a large drawer can occupy most of a dishwasher rack. Hand washing may extend the life of a non-stick coating. Check whether warranty registration is required and whether replacement drawers, plates or seals are sold. A steam model also needs its water path cleaned and descaled.
Calculate running cost from time and power
Peak wattage alone does not tell you the cost of a meal because heating elements cycle and cooking times differ. Multiply kilowatts by hours used, then by your electricity unit rate. Our air fryer wattage guide explains the calculation, and Ofgem publishes the current energy price cap. Manufacturer energy-saving percentages apply only to the food, oven and method named in the supporting test.
Once you have chosen a model, use our air fryer cooking-times chart and air fryer cleaning guide. Leaving room for hot air to circulate usually matters more than adding another preset.
The Bottom Line
Buy the Ninja Double Stack XL SL400UK if you want the best balance of two-zone capacity and sensible worktop width. Choose the Cosori TurboBlaze for one capable drawer, the AF500UK for a removable-divider family basket, the Instant Vortex Dual for a large PFAS-free asymmetric layout, or the Philips 5000 Series when steam is a feature you will use regularly. The best model is the one whose basket shape fits both your meals and your kitchen.
Frequently Asked Questions
What is the best air fryer in the UK? The Ninja Double Stack XL SL400UK is our best overall choice because it combines two independent drawers and 9.5 litres of capacity with a narrow 28cm body.
Which air fryer is best for a family? Choose the Ninja AF500UK when you need one broad 10.4-litre zone as well as two smaller zones. Choose the SL400UK when worktop width matters more.
How much air-fryer capacity do two people need? A 4–6-litre single drawer normally suits two people, but basket shape matters if you want food spread in one layer rather than piled deeply.
Is a dual-zone air fryer worth it? It is useful when a main and side need different times or temperatures. A single drawer is usually the better fit when you cook one food at a time.
Do air fryers cost less to run than ovens? They can for smaller portions because they heat a smaller chamber, but cost depends on wattage, cooking time and your electricity tariff rather than the appliance name alone.
Can air-fryer drawers go in the dishwasher? All five selected manufacturers describe key removable parts as dishwasher-safe. Hand washing may still help preserve a non-stick surface, and steam models also require water-system care.