Home Heating Equipment Guide: Portable Heaters, Radiators & Electric Heating Explained

Choosing a heater sounds simple until you actually start looking. Fan heater or convector? Oil-filled radiator or infrared? Is a 2kW heater expensive to run? And what happens when the space you need to heat isn’t a cosy spare bedroom, but a draughty garage or working workshop?

Those questions matter because heating is already one of the biggest household energy costs. The Energy Saving Trust says heating and hot water account for more than half of the energy used in a typical home, so throwing more heat at a cold room without thinking about where that heat is going can get expensive quickly.

This home heating equipment guide explains the main choices available for UK homes and home offices. We’ll look at how each heater works, where it makes sense, what different wattages actually cost to run, and how to choose the right heating equipment for different rooms.

Central Heating or Portable Heating: Which Do You Actually Need?

Central heating makes most sense when several occupied rooms need warming for a sustained period. Portable heating is at its strongest when you need targeted heat in one area, temporary warmth, or heating somewhere that is not served properly by the main system.

Most UK homes still rely on some form of whole-property heating: commonly a boiler feeding radiators, although heat pumps and electric systems are becoming more familiar. Portable electric heaters sit alongside that system rather than necessarily replacing it.

Imagine working from home in a small office while the bedrooms, dining room and spare room sit empty. Heating the entire property purely to stop one room feeling chilly may make little sense. A correctly sized local heater can be useful there, particularly if the main heating can genuinely be turned down elsewhere.

The situation changes at 7pm when four people are using different rooms. At that point, trying to maintain comfortable temperatures with several separate plug-in heaters may cost more than letting the main heating system do its job.

Use Heating Controls Before Simply Adding More Heat

Before buying more heating equipment, check whether the existing system is being used well.

Energy Saving Trust recommends setting a room thermostat at the lowest comfortable temperature, which for most people is somewhere between 18°C and 21°C. It estimates that turning a thermostat down from 22°C to 21°C could save around £120 per year in Great Britain, although the exact figure naturally depends on the property and heating system.

That is often a better first move than leaving the central heating turned up and then adding another 2kW appliance on top.

A useful rule is:

• Several rooms need heat: start with the main heating system.
• One occupied room needs extra warmth: consider a portable or panel heater.
• You need warmth immediately for a short period: a fan or radiant heater can make sense.
• You need steady background warmth for hours: look towards a thermostatic convector, panel heater or oil-filled radiator.

Jawel Tools stocks a range of home and office heaters, giving you several options depending on how quickly you need warmth, how long the heater will be running and the size of the room.

The Main Types of Portable and Electric Heater

If you’re comparing portable heaters in the UK, don’t start with the brand name or even the wattage. Start with the way you want the room to feel.

Different heaters can consume the same amount of electricity but deliver that heat very differently.

Here is the short version:

• Fan heaters move heated air quickly and are useful when you want warmth fast.
• Ceramic and PTC heaters combine an electric heating element with forced airflow, with many models aimed at tougher workshop use.
• Convector heaters warm the surrounding air more gradually and suit background room heating.
• Oil-filled radiators take longer to warm up but provide steady, silent radiant and convected warmth.
• Infrared and radiant heaters warm people and surfaces directly instead of relying entirely on heating the surrounding air first.
• Electric panel heaters are a neat option for more permanent room heating, particularly where programmable or smart control is useful.

Let’s look at where each one earns its keep.

Fan Heaters: Fast Heat When You Don’t Want to Wait

A fan heater is the heating equivalent of opening the throttle. Electricity heats an element and a fan pushes air over it, throwing warm air into the room almost immediately.

That’s why fan heaters work well for short bursts of heat. Walk into a cold home office first thing in the morning, switch one on, and you feel the result quickly rather than waiting for a large thermal mass to come up to temperature.

The compromise is noise. You have a fan running, so these are rarely the first choice for someone who wants silent background heating through an eight-hour working day.

A Practical Jawel Tools Example

The Sealey FH2010 2000W Fan Heater sold by Jawel Tools uses two 1000W heating elements, giving two heat settings, and has an ambient room thermostat. The casing can sit horizontally or vertically, and the fan can also run as a cool-air blower during warmer weather.

That makes sense for:

• a small office that needs heating quickly in the morning
• a utility room used for short periods
• temporary heating while carrying out a DIY job
• topping up a room that feels colder than the rest of the house

It is less attractive when absolute quiet is important or when you want heat lingering after the appliance cycles off.

A common mistake is buying a fan heater because it feels powerful and then leaving it running at full output all day. That’s where understanding running costs becomes important; we’ll calculate those properly later.

Convector Heaters: Quiet Background Heat for Rooms and Offices

Where a fan heater throws warmth at you, a convector is calmer.

Cooler air enters around the lower part of the heater, passes across the heating element and rises as it warms. That gradual air movement creates natural convection through the room.

The advantage is relatively quiet operation on models without a fan, plus a more even background temperature than the concentrated blast you get from a small fan heater.

This makes convectors particularly useful for:

• home offices
• bedrooms while occupied
• conservatories when appropriate for the appliance
• small studios
• temporary heating where no fixed radiator is available

Jawel lists several 2kW convector options, including basic thermostatic models and versions with turbo fans or timers. The CD2005TT Convector Heater, for example, has 750W, 1250W and 2000W settings, a room thermostat, turbo fan and 24-hour timer, giving more control than simply switching a 2kW element fully on or off.

That flexibility is useful in the real world. You might use the higher output to bring a cold room up to temperature, then let the thermostat cycle the heater rather than having it pull its maximum rated power continuously.

Fan Heater vs Convector Heater

The better choice depends less on which one is “best” and more on what you’re asking it to do.

Choose a fan heater when speed matters. Choose a convector heater when you want a room to settle at a comfortable temperature without a constant blast of air.

A convector with a turbo function sits somewhere between the two, giving you faster air movement when required without forcing you to use the fan all the time.

Oil-Filled Radiators: Slow and Steady Heat

An oil-filled radiator is the tortoise in the heater race.

An electric element warms sealed thermal oil inside the radiator body. That heat transfers into the metal fins and then into the room through a mixture of radiation and natural convection.

There is no combustion and the oil isn’t being used as fuel. It remains sealed inside the unit as a heat-transfer medium.

The big practical difference is thermal mass. The radiator takes longer to become fully warm than a fan heater, but the hot metal and oil don’t go cold the instant the thermostat cuts the element.

That creates a gentler feel and virtually silent operation.

Where Oil-Filled Radiators Work Well

They suit rooms where you expect to stay for a while:

• home offices
• studies
• showrooms
• living areas

Jawel’s current product data includes the RD800 800W six-element mini radiator, RD1500 1500W seven-element radiator, RD2500 2500W eleven-element radiator and RD2500T 2500W eleven-element radiator with a 24-hour timer. The larger models use thermostatic control, with the RD2500T also fitted with a tip-over safety switch and castors.

That range also demonstrates an important point: don’t automatically buy the biggest heater.

If a compact office only needs modest heat input, an 800W or 1500W appliance may make more sense than repeatedly cycling a 2500W unit. Conversely, expecting an 800W mini radiator to rescue a large, poorly insulated room on a freezing January morning will probably end in disappointment.

Are Oil-Filled Radiators Cheaper to Run Than Convector Heaters?

Not simply because they contain oil.

This is one of the most repeated claims around electric heaters, and it needs some context.

If a 2kW convector and a 2kW oil-filled radiator both run continuously at full power for one hour, each uses roughly 2kWh of electricity. The oil-filled radiator stores some heat in its oil and casing, while the convector transfers heat into the room more quickly, but neither creates free energy.

Where the difference becomes meaningful is control and use pattern. Thermostats, timers, the size of the room, insulation and how the heat is distributed affect how long the heating element actually needs to stay energised.

So rather than asking, “Which heater is magically cheaper?”, ask:

Which type will keep this particular space comfortable while spending the least time drawing unnecessary power?

That’s the much more useful question.

Infrared and Radiant Heaters: Heating the Person Rather Than Just the Air

Infrared heating takes another route.

Instead of depending mainly on warm air circulating around the room, radiant energy travels from the heater and warms the people and surfaces it reaches. Think about standing in winter sunshine: the air can still feel cold, yet sunlight hitting your face feels warm.

That characteristic can be particularly useful where heating all the air is inefficient.

A draughty home office can be a good example. Rather than waiting for all the surrounding air to warm up, radiant heat can provide more immediate warmth to the person sitting within its coverage area.

Where Radiant Heating Makes Sense

It is worth considering when:

• people stay in one defined working area
• the building is difficult to heat evenly
• doors are opened frequently
• you want the sensation of heat quickly
• air movement from a fan heater would be annoying

Placement matters. Radiant heat works best where it has a clear line towards the area that needs warming. Hide the heater behind a desk or aim it at the wrong part of a room and much of the benefit is lost.

Electric Panel Heaters: A Neater Long-Term Room Option

The Baridi glass panel heaters come in 1000W, 1500W and 2000W outputs, with models offering Wi-Fi control, thermostatic temperature control, timers and remote operation. That shifts the conversation from “portable emergency heater” towards planned room heating.

Panel heaters make sense where you want a cleaner, less temporary-looking installation in spaces such as:

• home offices
• bedrooms
• garden rooms
• small flats
• rooms without conventional wet radiators

Smart scheduling is more important than it might sound. A heater that only runs during the hours a room is occupied has an obvious advantage over one accidentally left heating an empty space.

The heater isn’t producing cheaper electricity. You’re simply using less of it.

Central-Heating Radiators: Don’t Forget the Main System

Portable heating is only one side of this guide.

Jawel also carries fixed Baridi radiators for hot-water central heating, including contemporary flat-panel and traditional column designs. These range considerably in physical size and heat output.

For example, the DH338 420 × 600mm double flat-panel radiator is listed at 1,560BTU/hr or 457W, while the larger DH342 600 × 1190mm model is rated at 4,420BTU/hr or 1,295W. The DH353 vertical 420 × 1800mm radiator is rated at 4,171BTU/hr or 1,222W.

This is why radiator sizing matters.

A radiator should be chosen around the heat loss of the room, not simply around which size looks best on the wall. An undersized radiator may run hot for long periods and still leave the room struggling to reach temperature. An appropriately sized one has a much better chance of keeping pace with the heat escaping through walls, windows, floors and ventilation.

Portable Heater Comparison: Which Type Suits Which Job?

A quiet 1500W oil-filled radiator may be ideal for a home office used throughout the day, while a fan heater may suit someone who only needs quick warmth for twenty minutes on a cold morning. Neither is universally better; they solve different heating problems.

How Much Does an Electric Heater Cost to Run in the UK?

This is where heater comparisons become much easier.

The basic calculation is:

Heater power in kW × hours used × electricity price per kWh = approximate running cost

As of September 2026, Ofgem’s average electricity unit rate for a standard variable tariff paid by Direct Debit is 26.11p per kWh across Great Britain for the period 1 July to 30 September 2026. From 1 October 2026, the average capped unit rate is scheduled to move to 26.32p/kWh. Your actual tariff and regional rate can differ.

Using 26.11p/kWh gives the following rough maximum hourly costs when a heater is drawing its full rated power continuously:

That table is deliberately simple. A thermostatically controlled heater should cycle once the room reaches the chosen temperature, so its real hourly consumption over a long session can be lower than its maximum rating suggests.

What Does a 2kW Fan Heater Cost to Run?

At the September 2026 Ofgem average rate:

2kW × 1 hour × £0.2611 = approximately £0.52 per hour

Run continuously for four hours and the theoretical maximum becomes around £2.09.

Again, a thermostat may reduce that if the heater reaches its set temperature and cycles off. A poorly insulated room where the heater never catches up may keep it drawing close to full power for much longer.

Why Wattage Matters More Than Marketing Claims

Suppose one box says “energy efficient oil radiator” and another says “rapid heat convector”. If both units draw 2kW continuously, both are consuming around 2kWh each hour.

What changes is how that heat reaches you and how the controls manage it.

So look beyond phrases such as “low-cost heat” and check:

1. rated wattage
2. number of heat settings
3. thermostat
4. timer
5. room suitability
6. where the heater will sit
7. how long it will actually need to run

That’s the practical route to lower running costs.

How to Choose the Right Heater Size

A heater needs to replace roughly as much heat as the room is losing.

That sounds obvious, but room size alone doesn’t tell the full story. Two 15m² rooms can behave completely differently if one has modern glazing, insulated walls and a low ceiling while the other has old sash windows, an outside wall and a draught under the door.

Watts and BTU Explained

Watts measure the rate of heat output or electrical power. BTU/hr — British thermal units per hour — is another measure commonly used for radiators, air-conditioning equipment and larger heating equipment.

The conversion is:

1 watt ≈ 3.412BTU/hr

So:

• 1kW ≈ 3,412BTU/hr
• 1.5kW ≈ 5,118BTU/hr
• 2kW ≈ 6,824BTU/hr
• 2.5kW ≈ 8,530BTU/hr

Don’t confuse this with energy consumed over time. A 2kW heater running for two hours uses up to 4kWh of electricity.

Is 100 Watts per Square Metre a Good Rule?

You will often see around 100W per square metre used as a quick estimate for a reasonably typical room.

It can be handy for a first look:

Treat that as a rough sizing shortcut, not a professional heat-loss calculation.

A room with large areas of glazing, poor insulation, high ceilings or several external walls may require considerably more. A modern, well-insulated room may require less.

For a fixed central-heating radiator, a proper room heat-loss calculation is the better approach.

Insulation Can Matter More Than Buying a Bigger Heater

Sometimes the heater isn’t the problem. The building is.

If warm air is disappearing through poorly sealed windows or a home office has a draught under the external door, buying a more powerful heater means you’re paying to replace lost heat faster.

Before moving up in wattage, check the basics:

• draughts around windows and doors
• gaps around loft hatches
• poor loft or wall insulation
• open chimney draughts where appropriate
• large areas of uninsulated glass
• curtains or furniture blocking existing radiators
• workshop doors left open unnecessarily

Energy Saving Trust makes the same underlying point: better-insulated homes need less energy to maintain a comfortable temperature, whatever heating system they use.

A £10 draught fix can sometimes do more useful work than another 500 watts of heater.

How to Use Portable Heating Without Wasting Energy

Portable heating is most useful when it is targeted.

If you’re working alone in one room, there is little sense in running an electric heater there while leaving the central system set high enough to heat every unused bedroom as well.

Better habits include:

1. Heat occupied areas rather than empty ones. Use timers, thermostats and radiator valves where appropriate.
2. Use the lowest comfortable temperature. For many people that falls somewhere around 18–21°C.
3. Don’t oversize for the sake of it. More wattage means more maximum power draw.
4. Use the thermostat properly. Turning the thermostat to maximum does not make a correctly functioning heater warm the room magically faster; it changes the temperature at which it stops calling for heat.
5. Use timers when your routine is predictable. There is no point heating an office two hours after everyone has gone home.
6. Deal with draughts first. Heat retained is heat you don’t have to buy again.

For regular room heating, a model with a good thermostat and timer can be far more useful than a cheap heater with nothing but an on/off switch.

Portable Heater Safety: The Rules That Matter

Portable heaters deserve respect. They draw a lot of power and produce enough heat to ignite nearby materials if badly positioned.

Electrical Safety First recommends placing portable heaters on a level surface and keeping them at least one metre away from combustible materials such as furniture, paper and curtains. It also advises against leaving portable heaters running unattended or while sleeping.

Never Treat an Extension Lead as the Default Solution

This one catches people out.

Electrical Safety First specifically advises not powering a portable heater from an extension lead, because the high load can overload the lead and create a fire risk.

If extension equipment must be used for other tools, pay attention to its rated current. Cable reels in particular need to be fully unwound to carry their stated load safely, as a wound cable can build up heat.

With heaters, the safest approach is normally a suitable wall socket used according to the appliance instructions.

Check These Heater Safety Features

Depending on the heater type, useful protection may include:

• tip-over cut-out, which switches the appliance off if it falls
• overheat protection
• thermostatic shut-off
• timer control

Features don’t replace safe placement. A heater with a tip-over switch still shouldn’t be wedged between a sofa and a curtain.

Check the Cable Before Winter

Portable heaters often spend six months forgotten in a cupboard, loft or workshop corner.

Before putting one back into service:

• inspect the plug
• check the flex for cuts, crushing or heat damage
• clear dust from ventilation openings
• check wheels or feet are secure
• make sure controls operate correctly
• stop using the heater if the plug or socket becomes unusually hot

Electrical Safety First recommends checking cables regularly for visible damage and taking signs such as scorch marks, hot plugs, arcing or a burning smell seriously.

Home Heating Equipment Buying Checklist

Before buying, run through this list:

• What is the room’s floor area?
• How well insulated is it?
• How many outside walls and windows does it have?
• Do you need heat immediately or for several hours?
• Is fan noise acceptable?
• Would a timer be useful?
• Does it have thermostatic control?
• Is there a suitable wall socket close to the intended position?
• Will children or pets be able to reach it?

Five minutes spent answering those questions will usually narrow the choice far more effectively than scrolling through heaters by price alone.

Frequently Asked Questions About Home Heating Equipment

Which portable heater is cheapest to run in the UK?

There is no single heater type that is automatically cheapest in every situation. For direct electric heaters, running cost depends mainly on power consumption, how long the heating element runs and your electricity tariff.

A lower-wattage radiant heater can cost less when you only need to warm one person or a small zone. For sustained room heating, thermostatic control, insulation and choosing an appropriate output become more important than whether the casing contains oil or a convector element.

How much does a 2kW heater cost to run per hour?

At Ofgem’s average capped electricity rate of 26.11p/kWh for 1 July to 30 September 2026, a 2kW heater drawing full power continuously costs about 52p per hour.

Actual consumption can be lower where a thermostat switches the heating element on and off after the desired room temperature is reached.

Is an oil-filled radiator better than a convector heater?

An oil-filled radiator is often better where silent, steady heat is wanted over a longer period. A convector usually brings the surrounding air up to temperature more quickly, and turbo-assisted models can speed that up further.

Neither type is automatically cheaper simply because of the heating method. Compare wattage, thermostat behaviour, timer controls and how long the heater will actually run.

Are fan heaters expensive to run?

A fan heater is not inherently more expensive than another electric heater of the same wattage running for the same length of time.

For example, a 2kW fan heater and a 2kW convector each use up to 2kWh during one continuous hour at full power. Fan heaters can still become costly when used for long periods because their fast heat makes it tempting to leave a high-output model running.

What size heater do I need for a 10m² room?

Around 1kW is sometimes used as a rough starting estimate for a reasonably insulated 10m² room with an average ceiling height.

Treat that only as a first approximation. Poor insulation, large windows, high ceilings, draughts and outside temperature can increase the heat requirement considerably.

Can I leave an oil-filled radiator on overnight?

Electrical Safety First recommends not leaving portable heaters unattended or operating while you are asleep. Follow the manufacturer’s instructions for the exact heater rather than assuming a particular heater type is safe for unattended overnight use.

Can I plug a 2kW heater into an extension lead?

Electrical Safety First advises against powering portable heaters through extension leads because they can be overloaded and present a fire risk. Where possible, plug the heater directly into a suitable wall socket and follow the manufacturer’s instructions.

What is the difference between watts and BTU?

Both can describe heat output.

One watt is approximately 3.412BTU per hour, so a 2kW heater corresponds to roughly 6,824BTU/hr. BTU ratings are particularly common on fixed radiators, air-conditioning units and high-output workshop heaters.

Finding the Right Heating Equipment for the Job

The best heater isn’t necessarily the one with the biggest wattage figure on the box.

For a small room that needs warming quickly, a compact fan heater may be exactly what you need. For a quiet office used throughout the day, an oil-filled radiator or thermostatic convector can be easier to live with. Infrared heating comes into its own where direct warmth matters, while smart panel heaters offer cleaner long-term room control.

Start with the space. Work out how and when you need the heat. Then choose the equipment.

Jawel Tools stocks a wide choice of home heating equipment, from compact fan and convector heaters to oil-filled radiators, infrared heating, electric panel heaters and fixed central-heating radiators.

Browse the Jawel Tools Home & Office Heater range for indoor heating.