The Best Electric Heaters in the UK for 2026

Our best overall is the De'Longhi Dragon 4 oil-filled radiator, because it keeps a whole living room or bedroom steadily warm for hours and keeps radiating heat after the thermostat cuts out, backed by De'Longhi's strong reliability record. If you mostly want to warm one room fast — a home office or study — the Dreo Solaris Slim H3 ceramic heater is quieter and cheaper and is our pick for zone heating. Choose the Dyson Hot+Cool HF1 only if you want a premium 2-in-1 that also cools in summer and don't mind the roughly £400 price.

No mains electric heater is inherently cheaper per unit than another: they all convert electricity to heat at close to 100% efficiency, so running cost is driven by wattage multiplied by how long the element is actually drawing power. The real savings come from heating only the room you're in (zone heating) and from a good thermostat that cycles the heater off once the room is warm — which is why we favour models like the De'Longhi Dragon 4 and Dreo Solaris Slim H3 with responsive thermostats. A lower-wattage panel used with a schedule will usually cost less to run than a 2500W radiator left on continuously.

They suit different needs. Oil-filled radiators like the De'Longhi are best for sustained, even warmth in a room you occupy for hours, but they are slow to heat and heavy. Ceramic fan heaters like the Dreo warm the air within seconds and are ideal for quick bursts in a home office, but the room cools fast once they stop. Infrared panels like the Herschel warm people and objects directly rather than the air, which helps in draughty or high-ceilinged rooms and where you want a silent, wall-mounted heater, though the warmth is directional and needs line of sight.

Running cost equals the heater's power in kilowatts multiplied by the hours used, multiplied by your electricity unit rate. At an indicative rate of around 27p per kWh (check your own tariff, as rates change), a 2000W panel running flat out costs roughly 54p an hour, and a 1500W ceramic heater about 40p an hour. In practice a thermostat means the element isn't drawing full power the whole time, so the actual cost is usually lower — using a lower-wattage heater, a schedule and heating just one room are the most effective ways to keep the bill down.

As a rough guide for a reasonably insulated UK room, allow around 90–100W of heater power per square metre of floor space — so roughly 1kW for a small 10m² study, 1.5–2kW for a 15–20m² bedroom or living room, and more (or a whole-room oil-filled model) for larger or draughtier spaces. Higher ceilings, poor insulation and single glazing all push the requirement up. The Dreo (1500W) is aimed at small single rooms, while the 2000W Princess panel and 2500W De'Longhi Dragon 4 suit small-to-medium and medium-to-large rooms respectively. Bear in mind that a higher-wattage heater warms a room faster but costs more per hour when the element is actually drawing full power.

No — UK fire services and Electrical Safety First advise against leaving any portable heater running unattended or using one while you are asleep, and London Fire Brigade's bedtime routine is explicit that you should turn heaters off before you go to sleep. WATTB's recommendation is to switch a portable heater off before bed and always follow the manufacturer's instructions. The safety features fitted across most of our picks — tip-over cut-outs, overheat protection and child locks — reduce risk while a heater is in use and supervised, but they do not make unattended or overnight running safe, so we don't recommend any of these portable models for sleeping just because they have a thermostat and timer. If you want gentle background warmth overnight, a safer approach is a permanently installed, fixed heater used according to its instructions — such as the wall-mounted Herschel infrared panel — an electric blanket designed for overnight use, or your central heating on a low thermostat setting. Whatever you use, keep any heater on a hard level surface well clear of curtains, bedding and furniture, never cover it or use it to dry clothes, and don't run it from an extension lead.