Best Air Fryers for Low Energy Cooking UK: Which Ones Actually Cut Bills?

Last Updated: 18th March 2026

Ovens are expensive to run. A conventional fan oven drawing 2kW for 45 minutes costs roughly 72p at current UK electricity rates. A mid-sized air fryer doing the same job uses around 0.5 kWh — approximately 12p. That gap, repeated daily across a year, adds up to a meaningful reduction in kitchen running costs.

The catch is that not all air fryers are equal on efficiency, and buying the wrong size for your household wastes both electricity and money. This guide covers what actually matters before buying, the real savings numbers, and the three models worth considering on Amazon UK right now.

Everything else we’ve done to cut our kitchen energy costs is in our Smart Kitchen & Appliances Hub.

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What to Look for Before You Buy

Wattage — lower isn’t always better

A lower wattage air fryer sounds more efficient but a 1200W model that takes 30 minutes to cook chips uses the same energy as a 1500W model that takes 24 minutes. What matters is energy per portion cooked, not wattage alone. Well-designed mid-range models at 1500W hit the right balance of speed and efficiency for most households. Understanding what different kitchen appliances actually cost per hour puts this in useful context — an electric oven running at full temperature costs significantly more per session than most people realise.

Capacity — match it to your household

An oversized air fryer heating a large empty chamber to cook one portion wastes energy. A too-small model forces two cooking cycles where one should do. As a rough guide: 3–4L suits one or two people, 5–6L suits a family of three to four, and dual-basket models suit families who regularly cook different foods simultaneously.

Single vs dual basket

Single basket models are simpler, cheaper, and efficient for straightforward cooking. Dual basket models cost more but allow two different foods at different temperatures simultaneously — which can replace an oven entirely for a full meal. For families, the energy saving from one dual-basket session versus running an oven is significant.

Energy rating

A-rated and above models are worth prioritising for daily use. The difference in running cost between an A-rated and unrated model compounds quickly when the appliance is used every day.

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The Real Savings Numbers

At the current UK electricity rate of approximately 24p per kWh:

A fan oven running at 2kW for 45 minutes costs around 36p per session. An air fryer at 1500W running for 20 minutes costs around 12p per session. That’s approximately 24p saved per cook.

At one cook per day, that’s around £87 per year. At two cooks per day — realistic for families using an air fryer as their primary cooking method — the saving reaches £170 or more annually.

These are genuine figures at current rates, not marketing claims. The actual saving depends on what you’re replacing and how often you cook. If you want to calculate your own saving precisely, the per-session cost broken down by minute gives you the exact figures to work from.

We switched to using our air fryer for most weeknight meals about two years ago — anything that would previously have gone in the oven now goes in the air fryer first. The difference showed up on our energy bills within the first month and has been consistent since.

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Best Air Fryers for Low Energy Cooking on Amazon UK

1. Ninja AF100UK Air Fryer — 3.8L, 1550W — around £79–95

Best for: one to two people, first-time air fryer buyers, compact kitchens.

The Ninja AF100UK is consistently one of the most recommended entry-level air fryers in the UK and earns that reputation through reliability and simplicity rather than a long feature list. Four functions — air fry, roast, reheat, dehydrate — cover everything most households need, and the 3.8L capacity handles up to 900g of chips or a full meal for two comfortably.

The 1550W element heats quickly and maintains temperature efficiently. The non-stick basket and crisper plate are both dishwasher safe, which makes daily use considerably less effort. Setup is straightforward — this is a plug in and start cooking appliance, not one that requires a learning curve.

For households replacing an oven for smaller portions, the running cost difference is immediate and noticeable. The energy saving over an equivalent oven session is consistently around 60–70% for typical portions.

One honest note: dispatch times on Amazon have occasionally stretched to several weeks — worth checking current availability before ordering if you need it quickly.

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2. Tower T17099 Vortx Eco Dual Basket Air Fryer — 5.2L + 3.3L, 1700W — around £67–90

Best for: families of three to five, households who want to replace the oven entirely for daily cooking.

The Tower T17099 is the family pick. The dual basket design — a 5.2L large drawer and a 3.3L smaller drawer — allows two completely different foods at different temperatures simultaneously, which is the feature that genuinely enables families to cook full meals without turning the oven on at all.

The Smart Finish control adjusts cook times automatically so both baskets finish at the same time — a practical detail that makes coordinating a full meal considerably simpler than manually timing two separate items. Tower claims up to 70% energy saving compared to a conventional oven, which at daily family use translates to a meaningful annual reduction in kitchen electricity costs.

Eight one-touch presets cover the most common cooking tasks and the Vortx hot air circulation produces consistently crispy results without the uneven cooking that cheaper models sometimes produce. Build quality is solid and Tower is a well-established UK brand with good aftersales support.

The dual basket concept sounds like a minor convenience until you’ve used it for a week — after that, going back to timing things separately feels unnecessarily complicated.

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3. COSORI 5.5L Air Fryer — 1700W — around £60–80

Best for: households wanting a larger single-basket model with smart features at a competitive price.

The COSORI 5.5L sits between the compact Ninja and the dual-basket Tower — a large single-basket model that suits families of three to four who mainly cook one dish at a time. The 5.5L capacity handles a full family portion in a single cycle without the complexity of managing two separate drawers.

COSORI had a product recall in 2023 but this applied to specific older US models only — UK models sold on Amazon UK were not affected and current listings are entirely unrelated to the recalled products.

Eleven presets via the digital touchscreen cover everything from chips and chicken to baked goods and dehydrating. The 360° hot air circulation produces even results across the full basket and the removable non-stick basket is dishwasher safe. At 1700W it heats quickly and the preheat cycle is short enough that it doesn’t significantly add to cooking time or energy use.

For households who want a large-capacity single basket with a proven track record in the UK market, the COSORI 5.5L is a reliable daily driver at a price that makes it easy to justify.

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Single vs Dual Basket — Which Is Right for You?

Single basket air fryers are simpler, cheaper to buy, and perfectly adequate for households who mainly cook one type of food at a time. For one or two people, a 3.8–4.7L single basket covers almost every cooking scenario efficiently.

Dual basket models add meaningful value when cooking for three or more people regularly — the ability to cook protein and vegetables simultaneously at different temperatures, finishing at the same time, replaces the oven for a full meal rather than just a side dish. The additional cost is usually recovered quickly in reduced oven use.

If you’re buying for a family and want to make a genuine dent in kitchen energy costs, a dual basket model is worth the extra spend. For smaller households or anyone new to air frying who wants to try the concept before committing, the Ninja AF100UK is the right starting point.

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Getting the Most From Your Air Fryer

A few habits make a noticeable difference to results and efficiency.

Don’t overcrowd the basket. Air fryers work by circulating hot air around the food — pack the basket too full and the air can’t circulate, which means longer cooking times and uneven results. Cook in batches if needed.

Shake or turn halfway through. For chips, nuggets, and anything that benefits from all-round browning, a quick shake at the halfway point makes a significant difference to the final texture.

Use the right temperature. Air fryer temperatures run hotter than oven equivalents — as a starting point, reduce the temperature by 20°C and check a few minutes earlier than the oven recipe suggests.

Use a light spray of oil. A light spray on vegetables and coated foods improves crispiness without significantly adding to cooking time or calorie count. A refillable oil spray bottle gives better control than pouring directly from the bottle.

Clean the basket after every use. Grease buildup on the heating element reduces efficiency over time and affects flavour. Most baskets are dishwasher safe — use that.

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Frequently Asked Questions

Are air fryers actually cheaper to run than ovens? Yes — for most cooking tasks. A typical air fryer uses 60–75% less electricity than a fan oven for equivalent portions because it heats a smaller space more quickly and maintains temperature more efficiently. The saving is most significant when replacing full oven sessions with air fryer cooking, not just reheating small items.

Do air fryers work for baking and roasting? Yes — both work well. Cakes, bread, roasted vegetables, whole chicken joints — all produce good results. Cooking times are shorter than oven equivalents and temperatures typically need reducing by around 20°C compared to oven recipes.

What size air fryer do I need? One to two people: 3–4L. Three to four people: 5–6L. Families of five or more, or anyone wanting to cook full meals simultaneously: dual basket 8L+.

How long do air fryers last? Typically three to five years with regular cleaning. The non-stick coating on baskets is usually the first thing to degrade — using silicone air fryer liners and avoiding metal utensils extends basket life significantly.

Does preheating waste electricity? A brief one to two minute preheat for foods that benefit from immediate high heat — chips, breaded items — uses minimal additional electricity and improves crispiness. For most foods, preheating isn’t necessary and skipping it saves the small amount of energy the preheat cycle uses.

Can I cook a full family meal in an air fryer? Yes — particularly with a dual basket model. Protein in one drawer, vegetables or chips in the other, both finishing at the same time via the Smart Finish function on models like the Tower T17099. For families, this is the scenario where the energy saving versus a full oven is most significant.

Is an air fryer worth buying if I already have a microwave? Yes — they serve different purposes. A microwave reheats and defrosts efficiently but can’t crisp or brown food. An air fryer produces genuinely crispy results that a microwave can’t replicate. For households that currently use a microwave for reheating and an oven for cooking, an air fryer replaces most of the oven use while the microwave handles quick reheating. The two complement each other rather than one replacing the other — and for a direct running cost comparison between the two, the real energy test between air fryers and microwaves covers which wins for different cooking tasks.

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Which Air Fryer Should You Buy?

For one to two people or anyone new to air frying, the Ninja AF100UK is the straightforward starting point — reliable, compact, and consistently well reviewed across thousands of UK purchases.

For families who want to replace oven cooking for most daily meals, the Tower T17099 dual basket delivers the most practical energy saving — cooking full meals in one session without the oven running at all.

For households wanting a larger single basket at a competitive price with smart features, the COSORI 5.5L covers the gap between the two.

Whichever model you choose, the saving comes from actually using it — not leaving it on the worktop as an occasional gadget. An air fryer that replaces three or four oven sessions a week pays for itself within a few months and keeps saving from there. At current energy rates, that’s one of the fastest returns available from any kitchen appliance purchase.

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