Who is this for?

Weeknight vegetable-roasters

If vegetables need to finish alongside another dinner component, independently controlled zones may matter more to you than the space for one large batch. Ninja and Instant Pot describe models with separate cooking zones, though their layouts differ.

Family batch cooks

If you regularly roast vegetables for several people, compare the basket’s usable width and depth as well as its stated capacity. A divider can change how much uninterrupted space you have for the batch.

Small-kitchen diners

If you usually make one or two portions, check that a compact model has a roasting function, fits your worktop and has a cleaning routine you can manage. Instant Pot’s UK sizing guide suggests at least 3.8 L for one to two people as a starting point, not a guarantee of batch fit.

What matters when choosing?

Decide whether your usual dinner needs one uninterrupted vegetable batch or separately timed foods. Then check the basket’s usable space and the appliance’s fit in your kitchen; litres alone will not settle either question.

Concern What to check Who this matters to
Space for one batch Compare internal basket width and depth, the divider arrangement and maximum-fill guidance. If I roast vegetables for several people, I want them to fit without repeatedly cooking batches. Around 37% of consumers put batch space first.
Dinner timing Check whether zones have separate controls and whether the exact model can co-ordinate finishing times. When vegetables and another food need different settings, I want both ready for dinner together; around 27% of consumers prioritise that co-ordination.
Kitchen fit Compare external dimensions with your available worktop and storage space, allowing for the placement instructions. For smaller meals, I would rather have an appliance I can place and store comfortably than capacity I seldom use. Compactness comes first for around 18% of consumers.
Cleaning and safe use Check which removable parts can go in a dishwasher, plus the plug, fuse and model-specific use instructions. If I roast vegetables regularly, I need cleaning and everyday use to remain manageable. Around 18% of consumers make maintenance and safety their primary concern.

What should you avoid?

  • Treating litres as flat roasting space

    Baskets with similar stated capacities can differ in shape or divider layout. That affects how much of your usual vegetable batch fits in one uninterrupted area.

    Compare internal width and depth, the divider position and your usual batch, rather than choosing by the headline capacity alone.

  • Choosing dual zones when you mainly need one large batch

    Separate zones help with foods that need different settings, but fixed drawers do not create one larger cooking area. Convertible models need their own full-zone configuration checked.

    Choose separate zones for co-ordinating foods; if vegetables are usually the main batch, compare a large single basket with the full-zone area of any convertible model.

  • Using loose paper or filling past the stated limit

    Electrical Safety First warns that loose paper can reach a heating element and catch fire. Overfilling also conflicts with the manufacturer’s use guidance.

    Follow the exact appliance manual for liners and maximum fill, and do not leave the air fryer unattended while it is operating.

  • Assuming an energy claim applies to your vegetable dinner

    An energy comparison depends on the food, quantity, appliance and cooking conditions. Which? measures energy use for specified test foods, so those results do not establish the outcome for every vegetable batch.

    If energy use affects your decision, compare results for like-for-like cooking tasks rather than applying a claim from a different recipe to your own dinner.

Brands to consider

These brands offer examples of different basket formats. The features below apply to the named models, not to every air fryer bearing the brand name.

Instant Pot

A reference for compact single baskets and convertible-zone formats.

  • Instant Pot lists a roast function for the Vortex Plus 3.8L and describes the Vortex VersaZone 12L as usable either as one drawer or as two 6 L zones.
  • Check the exact model: the compact basket and convertible layout are features of different appliances.

Ninja

A reference for cooking vegetables alongside another food in a dual-zone format.

  • Ninja and Which? describe the AF400UK as having two zones that can use different settings and timings.
  • Its separate zones should not be mistaken for one uninterrupted vegetable-roasting area.

Philips

A reference for a larger single basket or a configurable basket, depending on the model.

  • Philips specifies the HD9285/93 at 7.2 L / 1.4 kg and describes the NA565/92 as configurable between separate 3 L and 6 L baskets and one basket of approximately 10 L.
  • Those capacity figures describe different models and do not, by themselves, establish how much of your vegetable batch will fit in a suitable layer.

Joybuy product choices for flexible and dual-zone cooking

These air fryers are choices to consider when vegetables may share dinner time with another food. Some have a removable divider for a larger single zone; compare that arrangement with the fixed two-drawer format if uninterrupted batch space is your priority.

Haier Flex HAF3ADW air fryer with divider

Haier Flex HAF3ADW 11L air fryer with divider

Consider this for dinners where you may want a vegetable batch or separately timed foods; check how its divider changes the space for your usual quantity.

The title specifies an 11 L capacity, roast function, Sync function and dishwasher-safe parts. Check internal basket dimensions, maximum-fill guidance, worktop clearance and UK plug details for your intended use.

Joybuy
Ninja Foodi FlexDrawer AF500UK air fryer

Ninja Foodi FlexDrawer AF500UK 10.4L air fryer

The removable divider makes this worth comparing if you alternate between a larger vegetable batch and foods needing separate zones.

The title specifies 10.4 L capacity, dual-zone cooking, a roast function and dishwasher-safe parts. Check the internal cooking area in each arrangement, external dimensions and UK plug details.

Joybuy
Instant Pot Vortex VersaZone 9L air fryer in black

Instant Pot Vortex VersaZone 9L air fryer, black

If both batch space and separate dinner timings matter, check how this model’s zones are arranged and controlled before choosing it.

The title specifies a 9 L capacity and eight functions. Confirm its roasting mode, internal and external dimensions, cleaning instructions and UK plug details against the exact product.

Joybuy
HoninJoy 12QT Flex Basket air fryer

HoninJoy 12QT Flex Basket air fryer with liners

The Flex Basket format is relevant if your dinner alternates between one vegetable batch and separately cooked foods; check its usable dimensions in each arrangement.

The title specifies 12QT capacity, a roast mode, synchronised cooking, dishwasher-safe parts and 50 paper liners. Use liners only as the appliance instructions permit; also check maximum-fill guidance and UK plug details.

Joybuy
Ninja Foodi Dual Zone AF300UK air fryer with two drawers

Ninja Foodi Dual Zone AF300UK 7.6L air fryer, black

Consider the two-drawer layout when vegetables regularly cook alongside another dinner component, rather than when one uninterrupted vegetable batch is the priority.

The title specifies two drawers and 7.6 L total capacity. Check each drawer’s internal dimensions, the cooking modes, worktop fit and UK plug details for the exact model.

Joybuy

Common questions

Do I need a dual-drawer air fryer just to roast vegetables?

No. If one large vegetable batch is your main task, compare a large single basket or a convertible model in its full-zone arrangement. Separate drawers are more useful when vegetables regularly need different settings or a different finishing time from another food; check the space available in each drawer before deciding.

Will the litre capacity tell me how many vegetables will fit?

Not on its own. Litres describe capacity, not the uninterrupted basket width and depth available for your usual batch. Instant Pot’s UK sizing guidance also points buyers towards basket shape and width; check those dimensions, any divider and the manufacturer’s maximum-fill instruction for the model you choose.

Can I use baking paper or liners for roasted vegetables?

Use them only where the exact appliance instructions permit it. Electrical Safety First warns that loose paper can reach a heating element and catch fire, so follow the manufacturer’s instructions for whether and how paper must be secured.

Can every air-fryer basket go in the dishwasher?

No; check the cleaning instructions for the exact parts and model. Philips states that the removable parts of its HD9285/93 are dishwasher-safe, but that specification does not establish the cleaning requirements of another air fryer.

What electrical details should I check for use in Great Britain?

Check the exact appliance for a UK three-pin plug and fuse, and keep its instructions and proof of purchase. Electrical Safety First gives these consumer checks and also advises buying from a reputable retailer. Follow the model’s placement and operating instructions when you use it.