what is an induction hob and how does it work?
Not to be confused with an electric hob, induction hobs have a series of copper coils under each cooking zone. An alternating electrical current is passed through the coil, which creates an oscillating magnetic field. Induction hobs work by creating this magnetic field that induces electric currents in the pan, producing heat directly in the cookware rather than in the hob itself. This means induction hobs heat pans directly through electromagnetic induction, resulting in faster and more energy efficient cooking. Only the pan heats up, not the hob surface, so less heat is lost to the surrounding air, keeping your kitchen cooler and making induction hobs more energy efficient.
When comparing induction hobs to other types, induction hobs heat just the base of the pan, while ceramic hobs and a ceramic hob heat the entire surface beneath the pan, leading to longer heating and cooling times. Unlike a gas hob, which uses an open flame, induction hobs do not have an open flame, making them safer to use.
To use an induction hob, you will need to have compatible, conductive pots and pans. Only pans made from magnetic material will work, so you may need to check your current cookware for compatibility. The best pans to use are those with a flat, even thick base made of ferrous metal (cast iron or steel). To check if a pan will work, run a magnet across the base—if the magnet sticks, the pan will work. Induction hobs require both a suitable power supply and compatible cookware to function properly.
Look at the images below, the base shown on the left is perfect for induction, smooth, flat and even. The base on the right will work although nowhere near as efficiently, the magnetic base is thin and full of holes.
.
Not all induction hobs are the same. Size, zoning, function and control type vary across all makes and models. Here we have put together an overview of the options available to you.
induction hob size options
Induction hobs are widely available in the following standard widths – 30, 60, 70, 80, and 90cm.
Panoramic hobs (below) which are 90cm wide are available from some manufacturers, these are ideal for shallow-depth worktops and islands with breakfast bars behind.
basic induction
These are very straight forward to use, a simple induction hob with independently controlled cooking zones marked by a ring or cross to show the centre of the coil below.
flex / dual zone induction hobs
An induction hob with one or more large cooking areas that can be selected to work independently or split into 2 or more zones. These types of hob are great for a host of reasons, you can use hot plates or griddles with ease and have full temperature control over the complete cooking surface, multiple pots can be placed anywhere on the flex zone too.
With some models, the flex-zone can be pre-programmed to have set power levels at the front, middle and rear which is particularly useful if you are cooking foods that need to be brought to the boil, simmered and kept warm intermittently, all without having to amend the controls.
free induction hobs
The “Rolls Royce” of induction cooking, these premium hobs offer complete freedom and flexibility for control and pan placement. Lots of small copper coils are tightly grouped together below the cooktop, the magnet below each will detect your cookware wherever it is placed and the corresponding coils are activated to suit the pan shape and size.
Free induction hobs are controlled by a full TFT screen which will display the position of your cookware, tap on the desired pan and open up a control menu to alter the power setting and timer. Premium hobs come with a premium price, expect to pay between £1,800 and £3,000 for a hob of this type.
induction hob control types
There are 4 different types of control / interface for induction hobs.
touch control
This control type will be found on basic entry-level hobs. Simply touch the marker that represents the ring you wish to operate, and tap the + or – buttons to adjust the temperature. Hold the + for 3 seconds to jump straight to full power and hold – for 3 seconds to jump straight to zero.
slide control
This control type can be found on most types of hob, apart from free-induction. Simply touch the marker that represents the ring you wish to operate, then either tap the required power level on the corresponding ‘power bar’ or slide your finger along it to set the desired level.
twist control
This control type can only be found on certain brands. Much like slide control, you touch the marker / indicator that represents the ring you wish to operate then twist the dial to quickly adjust the power level. These dials are usually magnetic and can be easily removed to make cleaning the hob easier.
full TFT (touch screen) control
This control type can only be found on certain brands. Much like slide control, you touch the marker / indicator that represents the ring you wish to operate then twist the dial to quickly adjust the power level. These dials are usually magnetic and can be easily removed to make cleaning the hob easier.
Additional Features to Consider
When selecting an induction hob, it’s worth looking beyond the basics to find features that will make your cooking experience even better. Many induction hobs offer a range of power levels, allowing for precise temperature control to suit different recipes. Look for models with a boost function for rapid heating, and a child lock for added safety in family kitchens. Pan detection is another useful feature—this ensures the hob only heats up when a suitable pan is placed on a cooking zone, helping to prevent wasted energy and accidental burns. The quality of the hob surface is also important; a durable glass or ceramic finish makes cleaning quick and easy. Some induction hobs include advanced control panels with intuitive touch controls or even full-colour displays for effortless operation. Finally, consider the energy efficiency rating of your chosen hob—models with high energy efficiency not only help the environment but can also reduce your energy bills over time. By comparing these additional features, you can find the induction hob that best matches your cooking habits and kitchen needs.
