Ninja Foodi Dual Zone
A practical air fryer (7.6L, dual zone, 6 functions) that crisps food fast with little oil and costs less to run than an oven.
What Size Air Fryer Do I Need? (UK Guide)
Size is the spec people most often get wrong, buying too small for a family or too big for a couple. The trick is to match the litre capacity to your household, and to understand how dual-zone capacity works.
A rough sizing guide
As a general rule: around 4-5L suits 1-2 people; 6-8L suits 3-4; and 8L or more (or a large dual-zone) suits families of 4 or more and batch-cooking. A whole small chicken needs roughly a 5-6L drawer. If you're between sizes, going slightly larger gives flexibility for guests and batch cooking.
How dual-zone capacity works
On a dual-zone air fryer, the headline litres are the total of both drawers, so a 9.5L dual-zone is roughly two 4.75L drawers. That's great for cooking two foods, but each individual drawer holds less than the total suggests. If you often cook a big batch of one thing, a large single drawer may actually hold more in one go than a dual of the same total litres.
Our top picks
#1
#2 
Ninja Foodi MAX Dual Zone
A practical air fryer (9.5L, dual zone, 6 functions) that crisps food fast with little oil and costs less to run than an oven.
#3 
Ninja Foodi MAX Dual Zone
A practical air fryer (9.5L, dual zone, 6 functions) that crisps food fast with little oil and costs less to run than an oven.
#4 
Cosori FlexDrawer Smart Air Fryer
A practical air fryer (10L, dual zone) that crisps food fast with little oil and costs less to run than an oven.
#5 
Cosori Air Fryer TurboBlaze
A practical air fryer (6L, 9 functions) that crisps food fast with little oil and costs less to run than an oven.
#6 
Clear Window Air Fryer
A practical air fryer (6.2L) that crisps food fast with little oil and costs less to run than an oven.
Frequently asked questions
Is a 4L air fryer too small?
For 1-2 people it's fine for everyday portions. For 3 or more, or for batch cooking, you'll find it tight - step up to 6L or more, or a dual-zone.
Does dual-zone mean double the space?
Not in one basket. The total litres are split across two drawers, so each holds about half. It's about cooking two foods at once, not one giant portion.
Bottom line
Our top pick is the Ninja Foodi Dual Zone (our score 9.6/10) - A practical air fryer (7.6L, dual zone, 6 functions) that crisps food fast with little oil and costs less to run than an oven..