Plug-in heater vs fan heater: socket unit or corded 2 kW
Updated: 16.10.2026
You are about to buy the wrong heater because the title says plug in, or because the smaller one looks cheaper per hour. A plug-in heater vs fan heater choice is two products. One hangs on a BS 1363 socket, has no cable, and in this set is 400–1,200 W. The other is a corded fan heater around 2 kW, with a flex, for a whole small room. This page gives one recommendation with a condition. It is not the model table on the [plug-in fan heater comparison](/hub/portable-heaters/plug-in-fan-heater). The Products Compared editorial team compared the socket listings with public UK guidance on 16 October 2026. A qualifying purchase can earn a commission at no extra cost to you.
You are about to buy the wrong heater because the title says plug in, or because the smaller one looks cheaper per hour. A plug-in heater vs fan heater choice is two products.
You are about to buy the wrong heater because the title says plug in, or because the smaller one looks cheaper per hour. A plug-in heater vs fan heater choice is two products. One hangs on a BS 1363 socket, has no cable, and in this set is 400–1,200 W. The other is a corded fan heater around 2 kW, with a flex, for a whole small room. This page gives one recommendation with a condition. It is not the model table on the plug-in fan heater comparison. The Products Compared editorial team compared the socket listings with public UK guidance on 16 October 2026. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Stated output | Cable | Hour at 26.32p/kWh | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Cakoai Cakoai YL-01 1200 W | 1,200 W and 600 W | No flex | About 32p at 1,200 W | 6.3 | about £34.19 | View offer |
 Russell Hobbs Russell Hobbs RHPH7001 700 W | 700 W | No flex | About 18p | 8.6 | about £19.70 | View offer | |
| Best value |  Swan Swan SH27010N 700 W | 700 W | No flex | About 18p | 7.5 | about £9.20 | View offer |
On this page
Two products, one phrase
On a socket heater the pins go into the wall and there is no trailing flex. UK reviews of the Russell Hobbs RHPH7001 and the Swan SH27010N describe that: no wire on the floor. On a corded fan heater, plug-in only means it uses mains electricity. Shops list a 2,000 W freestanding fan heater as plug-in with a cable of about 1.7 m, and they do the same at 1,500 W. Read cable length, or the words “no cable”, before the wattage.
Drop a corded 1,500–3,000 W heater from this category even if the title matches your search. None of the eight heaters in this comparison is that corded 2 kW product, so this page will not name one to buy. The highest clean stated output on the socket side is 1,200 W on the Cakoai YL-01, which also prints a 600 W step and has four ratings. The other Cakoai title says 1,200 W while the model code says PTC-800CR, so do not quote it as a settled figure. An oil-filled radiator stores heat in oil and belongs in a different comparison. If you only need to know whether 400–700 W is enough, the small-room page already answers that.
Heat close to you, or across a small room
Choose the socket heater when you want heat close to you, at a desk, in a kitchen corner or in a box room, and you do not want a cable on the floor. The reviews describe that local warmth. A listing claim of about 10 m² does not turn them into living-room heaters. A corded heater around 2 kW is the one to look at when 500–700 W will not lift the room and you need the air across the floor warmer.
The gap is the stated power. This socket set clusters at 400 W, 500 W, 700 W, 800 W and a claimed 1,200 W. A typical corded small-room fan heater on UK shops is about 2,000 W. energy.org.uk notes that a resistive heater turns the electricity it uses into heat, whatever the case, and that a fan heater is fast and noisy, with heat that fades when it stops. Centre for Sustainable Energy adds that a fan heater is a poor main heat source for long periods beside central heating. Neither point makes the socket heater safer. It makes the job smaller.
What the hour actually costs
Use one rate for both. The Ofgem Direct Debit average in our notes is 26.32p per kWh from 1 October to 31 December 2026, for England, Scotland and Wales. With the element on continuously, that is about 13p an hour at 500 W, about 18p at 700 W, about 32p at 1,200 W and about 53p at 2,000 W. A thermostat on either type means the element is not drawing that power for the whole hour. Label the sums as arithmetic, not a bill.
The cheaper hour is less heat. A 700 W socket heater at about 18p does not do the work of a 2 kW heater at about 53p. If you still need the room warm, you have not saved the job. Real savings come from heating only the space you are in, and from switching off when you leave. A page that prices a 2,000 W fan heater using 27p per kWh is a different rate. Do not mix it with the 18p figure and call the gap a test.
Cable, cut-out, and the condition
The socket heater has no flex to trip over. It adds plug strain, which UK reviews mention on the Russell Hobbs 700 W and the Swan, and it needs clearance below the socket. Those reviews and the RHPH7001 instructions cite about 30 cm from the base to the ground. Overheat protection is widely stated, and it is not stated in the RHPH2001 feature bullets. A tip-over switch is usually absent, because the heater hangs.
The corded heater adds a cable and, on the shop examples in this search, often a tip-over switch. It still uses a normal UK 13 A socket. The failure the safety pages describe is the extension lead, not a missing dedicated circuit. Electrical Safety First applies to both: a UK 3-pin plug, no extension lead, about one metre from combustibles, and not left on while you sleep. Neither type is cleared here for a bathroom. Dorset & Wiltshire Fire and Rescue say standard portable electric heaters stay out of bathrooms and shower rooms.
Choose a plug-in socket fan heater when you want close heat, no cable on the floor, and the wall socket meets the clearance. Choose a corded fan heater around 2 kW when you need to warm a whole small room and you can live with the flex and the noise. If the socket is too low for the hanging heater, do not solve it with an extension lead. Change the heater type, or have an electrician move the socket.
Common questions
What is the difference between a plug-in heater and a fan heater?
In this comparison the plug-in heater hangs on the socket and has no flex, at 400–1,200 W in this set. The fan heater people mean in the same search is usually a corded unit around 2 kW with a cable. Both blow warm air. The title plug in appears on both, so read whether a cable length is listed before you compare the price.
Which should I buy for a desk, and which for a room I want warm across the floor?
Buy the socket heater for the desk or the corner, if the outlet is high enough. Buy a corded heater around 2 kW when the air across that small room has to warm up and 500–700 W will not do it. The socket listings’ 10 m² claims do not replace that split. This page does not name a corded model to order.
Is the plug-in heater cheaper to run?
Only while it is drawing fewer watts. At 26.32p per kWh a 700 W element is about 18p an hour and a 2,000 W element about 53p, if each stays on at that output. The type of heater does not change the conversion. The cheaper hour is less heat. A thermostat on either heater shortens the time the element is on.
Does a 2 kW fan heater need a special socket?
These corded heaters are sold for a normal UK 13 A wall socket. The safety problem in the sources is an extension lead, not a missing dedicated circuit. A 2 kW load is still a large share of what a 13 A socket can feed if other appliances share it, which is a reason to plug into the wall and not into a reel that is already in use.
Which one has a cable I can trip over?
The corded fan heater. The socket heater’s complaint is the weight on the plug, and the gap under a hanging body. A lead of about 1.7 m on a shop listing is the trip hazard. A rotating plug on a socket heater does not create a cable, and it does not remove the clearance rule.
Can either of them go in a bathroom?
No. Standard portable electric heaters stay out of bathrooms and shower rooms on the Dorset & Wiltshire guidance used here. None of the eight socket listings states an IP rating. A corded 2 kW fan heater is not cleared by these sources either. If the only sockets are in that zone, ask an electrician.
Why do titles call a corded heater plug in?
Because it plugs into the mains. The phrase is not reserved for a heater with no cable. Listings then add a cable length or a freestanding tip-over switch. If you see a flex, you are looking at the corded product, even when the search you typed was for a plug-in heater.
Related pages
Sources
Public UK sources last checked on 16 October 2026. Prices and star ratings are the amazon.co.uk figures on the listings used for this comparison.
- Electrical Safety First: Portable heaters (retrieved 16.10.2026)
- Electrical Safety First: Plugs and fuses (retrieved 16.10.2026)
- Plugs and Sockets etc. (Safety) Regulations 1994 (retrieved 16.10.2026)
- Electrical Equipment (Safety) Regulations 2016 (retrieved 16.10.2026)
- OPSS product safety report 2212-0070: portable heater (retrieved 16.10.2026)
- Ofgem: Energy price cap unit rates and standing charges (retrieved 16.10.2026)
- Dorset & Wiltshire Fire and Rescue: Staying warm safely (retrieved 16.10.2026)
- SELECT: BS 7671 Section 701, bath or shower rooms (retrieved 16.10.2026)