Air Fryer vs Oven: Does an Air Fryer Really Save Energy?

It is the question everyone asks before buying one: is an air fryer

actually cheaper to run than an oven, or is it just marketing? The short

answer is that for most everyday cooking, yes — and the reason is simple

physics.

Why an air fryer uses less energy

An oven heats a large cavity, often 60 litres or more, and takes 10–15

minutes just to reach temperature. An air fryer heats a small basket —

usually 4 to 5 litres — and is ready in about 3 minutes. Less space to

heat, less time at full power, less energy used.

Manufacturers claim savings of up to 75% on energy versus a conventional

oven for comparable cooking. Independent comparisons vary by dish and

portion size, but the direction is consistent: the smaller the meal, the

bigger the saving. Heating a full oven for a single portion of chips is

where the waste really shows.

What UK households actually say

In a recent poll of 2,000 UK adults, the air fryer overtook the hob,

microwave and oven as the country's most-used cooking appliance. The

reasons people gave were faster cooking (60%), convenience (54%) and

lower running costs (49%). Running costs and energy efficiency were

rated important by 90% and 88% of respondents when choosing what to cook

with.

When the oven still wins

An air fryer is not better at everything. For a large roast dinner, a

big batch of baking or several trays at once, the oven's capacity wins

and running it once beats running an air fryer three times. The energy

saving is greatest for everyday meals: weeknight dinners, frozen food,

roasting vegetables, reheating leftovers.

How to maximise the saving

• Cook small and medium portions in the air fryer; save the oven for

big joints and batch bakes.

• Preheat for 3 minutes, not 10.
• Batch your cooking: fill the basket sensibly rather than running it

half-empty twice.

• Reheat in the air fryer instead of the oven — it is faster and

keeps food crisp, unlike the microwave.

The bottom line

For a household that cooks daily, an air fryer typically pays for itself

in convenience alone — and on energy, it wins on most meals that are not

a full roast. A 4L model like the Tower 4L Digital Air Fryer (£36.79)

or the family-sized COSORI Pro LE 4.7L (£82.79) both come with free UK

delivery over £30 and a 2-year warranty at Clean Smile Home.