Aga Range Cooker Explained

Unlike ordinary cookers that heat up on demand, the Aga range cooker is built on the principle of heat storage. It uses a single, slow-burning heat source to warm a heavy cast-iron core, which then gently radiates consistent heat into the ovens and hotplates. This simple yet ingenious system creates a unique, always-ready cooker that operates silently and reliably, often for decades.

1. Centralised Heat Source

Depending on the model, the core is heated by:

• a vaporising oil burner
• a gas burner
• a solid fuel firebox
• or, in converted Agas, an electric element

This source runs continuously at a low level, feeding heat into the cooker’s thermal mass.

2. Cast-Iron Heat Storage

The cast-iron body absorbs and stores heat, then releases it slowly through radiant and convective heat. This method ensures food cooks evenly and stays moist, with no fan, no noise, and no temperature fluctuations.

3. Multiple Ovens at Fixed Temperatures

Each oven is always at a stable preset temperature:

• Roasting oven (approx. 220 to 240°C)
• Baking oven (approx. 180 to 200°C)
• Simmering oven (approx. 120 to 140°C)
• Warming oven (approx. 50 to 100°C)

You choose the oven for the task, rather than adjusting the heat.

4. Hotplates Ready to Cook

Two cast-iron hotplates, boiling and simmering, sit atop the cooker, instantly ready under insulated lids. They’re perfect for frying, boiling, or warming dishes.

5. Gentle, Continuous Cooking

Always on, always ready. With an Aga, there’s no preheating. It holds its temperature even after opening the door, allowing multiple dishes to cook simultaneously.

Many owners now choose to convert their Aga to electric. This keeps the traditional cooking method, but adds energy efficiency and zoned control. Learn more about our Aga electric conversions.

One of the most frequently asked questions is:
“What fuel does an Aga use?”

The answer depends on the age and model of the cooker. Here’s a quick guide:

1. Solid Fuel (Coke, Coal, Anthracite)

These were the original Aga models, designed in the 1920s. They burned solid fuel like coke or anthracite and had to be manually refuelled and de-ashed. These Agas are rare today, and most have been converted to run on oil, gas or electricity.

2. Oil-Fired Agas

Oil Agas became popular in rural areas without mains gas. They are fed from an external oil tank and use a wick or pressure-jet burner. They’re dependable and powerful, but require regular servicing and the fuel cost can be high.

3. Gas Agas (Natural Gas or LPG)

Clean-burning and convenient, gas Agas connect to mains supply or bottled gas. They offer better control and are generally cheaper to run than oil. Like oil models, they need a flue and occasional servicing.

4. Electric Agas and Conversions

Modern electric Agas or electric conversion kits are becoming the most popular option. Instead of a flame, electric elements heat the cooker, either as an always-on source or in a more flexible, controllable way. No flue is needed, and it’s ideal for modern homes or people looking to reduce running costs.

Many customers choose to convert their old gas Aga or oil Aga to electric with us. It cuts energy bills, removes the need for flue work, and offers zoned control, so you can turn individual ovens or hotplates on only when needed.

A new Aga can cost £10,000+. But a carefully rebuilt, older model can perform just as well or better. Here’s why more people are choosing reconditioned Agas:

• Cost-effective: A reconditioned Aga is often less than half the price of new.
• Built to last: Original models are engineered to endure decades, we just bring them back to life.
• Eco-conscious: Reusing and refurbishing avoids unnecessary manufacturing and waste.
• Customisable: Want a British Racing Green 4-oven oil Aga converted to electric? No problem. We’ll re-enamel, convert, and deliver it to your door.

Our team has restored hundreds of Agas for families across the UK. We can update yours with modern insulation, new burners, or fit a high-performance electric conversion. Full pricing breakdowns are available on our Reconditioned Aga prices and Aga refurbishment cost pages.