Electric Radiators and Panel Heaters

Electric radiators and panel heaters are direct-acting electric heating: appliances that turn electricity into heat the moment you switch them on, in the room you are in, with no boiler, no pipework and no flue. The maker states that they convert electricity into heat directly at 100%, so every unit of electricity they draw becomes warmth¹. What they cannot do is make electricity cheap. Electricity currently costs around four times as much as gas per kWh, so a home heated throughout with direct electric appliances will usually pay more for its warmth than the same home on gas².

The appeal is control and simplicity. Each radiator heats its room independently and can be programmed separately, so a spare room is never heated for the sake of the living room¹. Installation is simple and cheap compared with wet central heating, because there are no pipes to run and no radiators to plumb in⁴. Against that stand the running costs: a typical electric heater costs around 64p per hour to run, and a 2,500 W heater costs about 65p an hour at current prices⁵.

This page explains the types of direct-acting electric heater sold in the UK, what they cost to run, how they are sized and installed, the controls that keep bills down, and where they fit in a home's heating, including what they do and do not do for energy independence.

How electric radiators work and warm your space

Electric heating is any system that uses electricity as the main energy source to warm your home, and direct-acting appliances are the simplest branch of it: they use electricity when you want to heat the room, rather than storing heat overnight like a storage heater⁴. The main forms of direct acting heating are panel convector heaters, electric radiators, fan heaters and underfloor heating¹⁰. What they share is that the heat arrives fast and on demand: electric heaters deliver fast and consistent heat, quickly bringing a room to a comfortable temperature⁷.

An electric radiator is a sealed unit with an element inside. In dry thermal radiators the element heats a metal body directly; in oil-filled and thermal-fluid models it heats a liquid that circulates inside the sealed case, which takes longer to warm up but continues to give out heat after being switched off¹¹. Either way, no water from a central heating system passes through it, no combustion happens inside it and nothing is vented outside. The warmth reaches the room by a mix of convection, air rising as it passes over the hot body, and radiant heat given off from the surface.

Because each unit is self-contained, the room-by-room character of electric radiators is built in. The built-in controls allow you to heat individual rooms independently, with each radiator programmed separately, which the maker describes as giving complete temperature control and reduced wasted energy within the home¹. That is the practical difference from a gas central heating system: there is no single appliance whose efficiency governs the whole house, just a set of independent heaters each doing one room's work.

Matching panel heaters, convectors and radiators to rooms

Types of electric heating include electric radiators and electric panel heaters, and the distinction matters more than the similar names suggest². Direct electric heating covers panel heaters and wall-mounted electric radiators, and the two work on different principles: a panel heater or convector is designed to warm the air that passes over its surfaces, while a radiator has a larger thermal mass that holds heat and gives a blend of convected and radiant warmth⁴.

Oil-filled radiators sit between the two in behaviour. They take longer to warm up than a fan heater or a thin panel, but they also continue to give out heat after being switched off, which smooths out the temperature in a room used for long stretches¹¹. Fan heaters are the fastest to respond and the most portable, but they are working only while the fan runs. The running costs follow the type¹²:

There are also newer variants worth knowing about when choosing. Electric wallpaper, an infrared heating film applied to walls and ceilings, can provide a more even heat distribution in a room than radiators or smaller infrared panels, though a whole-house installation costs more than simply replacing an existing boiler¹³. At the other end of the scale, electric underfloor heating systems are often used for warming smaller spaces, such as toilets, utility rooms or ensuites, rather than whole properties¹⁴. For a fuller comparison of storage and direct-acting approaches, see direct acting electric heating vs storage heaters.

Fully efficient on use, yet four times costlier than gas

Every electric resistance heating product is 100% efficient at the point of use: all the electricity a radiator draws becomes heat in the room, with no flue losses and no heat lost in pipework on the way¹. So efficiency is not where the argument between electric radiators and gas boilers is decided.

It is decided by the price of the fuel. Electricity costs around four times as much as gas per kWh³. Energy Saving Trust gives the same picture, that electricity is around four times more expensive than gas per unit⁴, and the Scottish Government's Heat in Buildings Bill consultation analysis put the retail price of electricity at approximately four times that of gas per kWh at the time of consultation¹⁵. One retrofit organisation reports the ratio as 3 to 4 times, noting that even at that ratio residents of well-insulated electric homes can pay similar amounts to keep warm as those in less efficient gas homes¹⁶. The ratio matters because it is the single number that determines whether direct electric heating can compete on cost: a unit of gas, even with some of its energy lost up a boiler flue, is still far cheaper as a unit of heat than a unit of electricity bought at four times the price.

The comparison with heat pumps is the reason this ratio dominates policy debate. Electric heat pumps use about 3 to 4 times less energy than gas boilers to produce the same heat, which is what lets them overcome the electricity-to-gas price gap¹³. Direct electric heating options, including panel heaters, storage heaters and electric boilers, are much less efficient in that sense: they can have very high running costs and impose extra stress on the grid¹⁷. On carbon, the picture has improved: electric heating, both at the off-peak and standard rate, is now lower carbon intensive than fossil-fuel heating alternatives¹⁸, though one guide puts the carbon footprint of direct electric heating at around three times that of gas per unit of heat delivered¹⁹. The two positions reflect different assumptions about the grid and the period measured.

Typical hourly running cost of about 64p

The headline figure is simple: an electric heater costs around 64p per hour to run⁵. The Centre for Sustainable Energy's appliance table gives a 2,500 W electric heater at 65p per hour, or 11p for every ten minutes of use, at July 2026 prices⁶. These are per-hour figures for a heater running flat out; a thermostatically controlled radiator in a well-insulated room cycles on and off, so the real bill depends on how long it draws power, not how long it is switched on.

For context against other household appliances⁵:

A Confused.com running-cost table puts an electric heater used two hours a day at £2.28 a month on a standard variable tariff²¹.

Whole-house figures show why the per-hour numbers add up. Energy Saving Trust's illustration for a typical three-bed semi-detached house, space heating only, puts direct electric heating at £2,700 a year¹³. Heat pumps, by contrast, cost around £800 to £1,050 a year to run, making them one of the cheapest electric heating options²². Replacing storage heaters costs £900 to £1,400 per room, so the capital outlay and the running cost both need weighing⁴. For a fuller breakdown, see electric heating running costs and home heating running costs by fuel.

Fitting needs only a 13 amp supply, no pipes or flue

Direct electric heating can be simple and cheap to install because it does not need pipes, radiators or underfloor wet systems⁴. Most products just need a connection to the electric circuit¹⁸, and the maker's guidance for electric radiators is the same: they do not require extensive plumbing, making them an option for both new builds and refurbs, simply plug or spur in and they are ready to use¹. Because electric space heating does not normally require a flue or pipework, the whole heating system for a flat or an extension can be fitted in hours rather than days¹⁸.

What installation looks like in practice:

• A freestanding radiator with a 13 amp plug needs no installer at all.
• A fixed, wall-mounted unit on a spurred supply is an electrician's job, but a small one.
• In a new build, the heater can be installed at the second fix wiring stage, after the plastering, which simplifies the build programme¹⁸.
• Because the heaters operate as stand-alone units, it is easy to add heaters to a system at any stage, as budgets allow: a household can do the living room one year and the bedrooms the next¹⁸.

There are two things installation does not remove. The first is the electrical supply itself: every heater draws its full power as electricity, so a house heated throughout on direct electric needs a supply and wiring that can carry the load, a subject covered in electrical safety and supply for electric heating. The second is the law: installers must account for Part L building regulations when dealing with direct-acting electric heating, so a fixed installation is not a free-for-all. The rules that apply are set out in building regulations for heating systems.

Radiator wattage per square metre and ideal placement

Sizing an electric radiator means matching its heat output in watts to the room's heat loss, and the manufacturer guidance published in September 2026 explains how to calculate a room's heating requirements when choosing electric heating. The principle is the same as for any heat emitter: a room that loses heat faster than the radiator can replace it will never reach temperature, and a radiator oversized for the room will cycle on and off wastefully. The sizing logic for the whole heating system is covered in boiler sizing.

One comparison is worth understanding, because it explains why heat emitters are sized the way they are. A boiler typically runs at 75°C, and radiators fine at that temperature may not be big enough at 45°C, which is the flow temperature a heat pump uses²³. Electric radiators are not governed by flow temperature in the same way, since the element is either on or off, but the underlying lesson holds: the emitter must be sized for the heat the room loses, not for the floor area alone.

Placement matters as much as output:

• Install radiator reflector panels behind radiators attached to an external wall, so that heat is reflected into the room rather than lost through the wall²⁴.
• Reflector panels cost around £8 to £12 per radiator⁴.
• Draught-proofing and insulation reduce the heat a room loses in the first place, which means a smaller, cheaper radiator can do the same job²².

Where a radiator sits on an external wall with no insulation behind it, part of its output is warming the street.

Smart controls and heating zones explained

Controls are where direct electric heating earns its keep, because the fuel is expensive and every hour of unnecessary running is money. Thermostatic radiator valves adjust the temperature in different rooms, so unused spaces are not heated more than necessary²⁴. On electric radiators the same logic is built in: the built-in controls allow individual rooms to be heated independently, each radiator programmed separately¹.

Zoning works the same way whatever the heat source: it allows you to control the temperature of individual rooms, and smart, programmable thermostats can keep your home heated on a schedule to help minimise bills¹⁴. For a direct electric system, that means the hallway can sit at a lower setting all day, the living room can warm before the evening and the spare room can be left off entirely until a guest arrives. The more of the house that is zoned and scheduled, the less of that 64p per hour is spent on empty rooms.

Smart controls can be added to wet systems too: smart radiator valves typically cost between £35 and £80 each, about five times more than a traditional thermostatic valve, and a starter kit such as the Energenie MiHome Smart Radiator Valve Kit sells for £199.99²⁵. On electric radiators the programmable thermostat is usually inside the unit, so the cost is in the appliance rather than added afterwards. The wider subject, including how thermostats and timers interact, is covered in heating controls, thermostats and TRVs.

Minimal upkeep, with checks needed every five years

Electric heating needs very little maintenance⁴, and electric space heaters need no regular maintenance at all¹⁸. There is no boiler to service annually, no water to treat, no pressure to top up and, as covered below, no bleeding. The industry body BEAMA states that electric space heaters can last an average of 50% longer than a conventional fossil-fuel heat source¹⁰, and Energy Saving Trust makes a similar point about infrared products such as electric wallpaper, which might not need much maintenance and could last a long time¹³. The scheduled item is electrical: safety checks every five years are the recommendation for electric heating systems⁴.

Safety around the appliance itself is a matter of distance and attention. Put your heater on a level surface, well away from anything that could knock it over. For portable heaters specifically, the recommendation is not to use one overnight, and never to dry clothes directly on or close to the heater¹¹.

Two questions that come up often have short answers. Electric radiators do not need bleeding: bleeding means releasing trapped air so hot water can circulate properly, and electric radiators do not circulate hot water and do not trap air⁸. And no carbon monoxide detector is needed for an electric radiator, because carbon monoxide comes from burning fuel. The rules apply to fuel-burning appliances: where a new or replacement fixed solid fuel appliance is installed in a dwelling, a carbon monoxide alarm should be provided in the room where the appliance is located, meeting European Standards EN 5029²⁶, and Scottish scheme rules require that any room with a carbon-fuelled appliance, such as a boiler, fire, heater or flue, must also have a carbon monoxide detector in that room²⁸. The details are in carbon monoxide and home heating safety.

Best uses: homes without gas, flats and occasionally used rooms

Direct electric heating is at its most sensible where the alternative is expensive or impossible. Electric boilers are an option if you are off the gas grid, and because there is no flue there is more flexibility over installation¹⁹; the same logic applies to radiators and panels, which can go on any wall with a supply nearby. In flats, particularly those without gas, a set of electric radiators avoids both the gas connection and the communal flue questions. And in rooms used occasionally, a direct-acting radiator heats the room only when it is needed, unlike a storage heater that must be charged overnight whether or not the room will be used⁹.

The pattern shows up in official statistics. In the DESNZ Public Attitudes Tracker for Winter 2025, 9% of households reported an electric radiator as a secondary heating source²⁹, which tells you how the technology is mostly used in the UK: as a top-up for particular rooms rather than a whole-house system. That is a rational use. Where a home already has gas central heating, an electric radiator in a conservatory or a rarely used extension adds heat exactly where and when it is wanted, without extending the wet system.

Whole-house direct electric is a harder case. The running cost comparison above, £2,700 a year for direct electric heating in a typical three-bed semi against £800 to £1,050 for a heat pump, is the arithmetic that pushes most whole-house projects towards a heat pump or a hybrid¹³. Storage heaters, which charge on cheaper off-peak electricity, are the other electric option and are covered in storage heaters and Economy 7 and heating tariffs. Homes off the gas grid can compare the full set of options in heating a home off the gas grid.

Electric radiators and your path to energy self reliance

Electric radiators remove several dependencies at a stroke. There is no gas supply, no oil delivery, no boiler and no flue, so no dependence on a heating engineer's annual visit, an oil supplier's delivery schedule or the gas network. The maker's argument is that although the cost of electricity varies by location and energy provider, the use of electric heating systems lets you fully control the cost of your heating¹. Because heaters operate as stand-alone units, a household can expand the system room by room as budgets allow, which is a form of independence in itself¹⁸.

What remains is the big dependency: the electricity supply, and the supplier that sells it. Direct electric heating cannot store energy, so every hour of warmth is bought at the price of that hour, and the electricity-to-gas price ratio of around four to one is set by policy and the market, not the householder¹⁵. A home on direct electric heating is exposed to every price cap movement, and the price cap rises hit residents in all-electric homes hardest. The technologies that soften that exposure are storage, in the form of storage heaters or heat batteries, and generation, in the form of solar panels paired with a battery, which let a household buy or make electricity when it is cheap rather than when the room is cold.

The honest summary is that electric radiators give independence in hardware and control, and dependence in fuel. Nothing in the home can break that leaves it without heat, no combustion means no carbon monoxide risk and no flue to maintain, and each room's heating is under its own thermostat. But the fuel arrives on a wire from the grid, at a price the householder does not set. A household that values energy independence most highly will treat direct electric radiators as one layer, alongside insulation to cut the demand, time-of-use tariffs to cut the price, and possibly generation to cut the supply, a wider subject covered in home heating and energy independence.