Cost-conscious home heaters & warmth gadgets (UK)

Which type of heater suits which room?

• Fan and ceramic fan heaters warm a room quickly and are small and light. They suit short bursts, such as taking the chill off a bedroom before bed or a bathroom-adjacent room in the morning. They can be noisy, and they stop warming the moment you switch them off.
• Oil-filled radiators take longer to heat up but give steady, quiet warmth and keep radiating heat for a while after switching off. They suit a home office or bedroom used for a few hours at a time.
• Convector heaters are quiet and warm the air gradually. Good for background heat in a room you use for longer.
• Halogen and infrared heaters warm the people and objects directly in front of them. They can feel effective when you sit right in front of one, but don't do much for the room as a whole.

No portable heater is "energy-saving" in the sense of turning less electricity into more heat. They all turn electricity into heat at much the same rate. What saves money is a good thermostat, a timer and only heating the space and time you need.

Work out the running cost before you buy

Every heater lists its power in watts. To estimate the cost per hour on full power, divide the wattage by 1,000 and multiply by your electricity unit rate from your bill. At an example rate of 25p per kWh, a 2,000W heater costs about 50p an hour on full, and a 1,500W oil-filled radiator about 37.5p. A thermostat that cycles the heater on and off once the room is warm brings the real cost down. Our article on heated throws vs heaters vs central heating walks through the sums with examples.

The honest conclusion for most homes on a standard tariff: a portable electric heater makes sense for one room for a limited time, not as the main heating for a whole home. If you sit still for long periods, a heated throw or seat pad uses far less power. Our warmth without the bill guide covers those options.

Size the heater to the room

A small 1,000W to 1,500W heater is usually enough to take the chill off a small bedroom or study. A larger or draughtier room may need 2,000W or more, but it will cost more to run, and if the room loses heat through single glazing or gaps under doors, you're paying to warm the street. Fix the cheapest draughts first; see how to cut heating costs in a UK flat.

Safety features worth insisting on

• Overheat protection, which switches the heater off if it gets too hot inside.
• A tip-over switch, which turns it off if it's knocked over. Essential with children or pets.
• An adjustable thermostat, so it isn't running flat out all the time.
• A timer, so you don't forget to turn it off.
• A proper UK plug and clear manufacturer and model details on the listing and product.

Plug heaters straight into a wall socket, not an extension lead or multi-way adaptor, and keep them well away from curtains, bedding and clothes. Never use one to dry washing. Our electric heater safety article covers placement and checks in more detail.

Features that are nice to have

• Oscillation on fan and ceramic heaters spreads heat around the room.
• Low-noise or night modes matter in bedrooms.
• Wheels and a carry handle help with heavier oil-filled radiators.
• Smart or app control can be handy for warming a room before you get home, but check the heater still has physical controls and safety features.

Don't forget damp

Cold rooms are prone to condensation. If you're heating one room with a portable heater, keep the others gently warm or ventilated so moisture doesn't collect on cold walls. A dehumidifier helps if you dry washing indoors. Our article on condensation and black mould explains how to balance warmth and ventilation.

Buying tips

• Choose recognised brands from established retailers or sellers with a long track record; cheap unbranded heaters are more likely to cut corners on safety.
• Check the wattage, thermostat and safety features are stated clearly. If they aren't, pick another listing.
• Register the product with the manufacturer so you hear about any safety recall.
• Keep the box and receipt until you've used it for a few weeks.

Using a heater well once you've bought it

How you use a heater makes as much difference to the bill as which one you buy. Close the door of the room you're heating and put a draught excluder along the bottom; there's no point warming a hallway. Set the thermostat to a comfortable level, often around the 18°C the NHS suggests for rooms you use, rather than running the heater on full power and switching it off when it gets too hot. Use the timer to warm a home office for 20 to 30 minutes before you start, then let the thermostat hold the temperature.

Position matters too. A heater placed near the coldest part of the room, often by a window or outside wall, counters the cold air coming off it, but always keep the manufacturer's clearance from curtains and furniture. Don't tuck it in a corner behind a desk where the warm air can't circulate.

Track the real cost for a week. If you have a smart meter, check the in-home display or app with the heater on and off. If you don't, a cheap plug-in energy monitor between the socket and heater shows exactly how many kWh it uses. Many people are surprised: a heater left on "just for the evening" every day can add a noticeable amount to a monthly bill, which is exactly the information you need to decide whether a heated throw, an extra layer or better draught-proofing would do the job for less.

Renters and heaters

If you rent and your central heating is broken or can't keep the home warm, a portable heater should be a stopgap, not the fix. Report the fault to your landlord in writing. Some landlords provide temporary heaters during repairs; ask. Keep a note of what you spend running plug-in heaters while you wait, in case you need to raise it later.

Quick decision guide

1. Sitting still in one spot? Try a heated throw first.
2. One small room for an hour or two? A 1,000W to 1,500W fan, ceramic or convector heater with a thermostat.
3. A home office for a full working day? An oil-filled radiator with a thermostat and timer, and close the door.
4. Whole home cold? Use your central heating efficiently, and get faults fixed, rather than relying on plug-in heaters.