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How to use a convector heater

Updated: 22 October 2026

You have unpacked a white convector, or you are still comparing models and want the routine before the cable reaches the wall. How to use a convector heater safely in a UK home is mostly about placement, the socket, and knowing when to unplug. Convectors warm air over an element. Surfaces still get hot, and the same lead and clearance rules apply as for any portable heater. The [convector comparison](/hub/heating/convector) ranks models. This page is the day-one habit. Peter F. checked amazon.co.uk listings and Electrical Safety First guidance. There was no lab test. A qualifying purchase can earn a commission at no extra cost to you.

You have unpacked a white convector, or you are still comparing models and want the routine before the cable reaches the wall.

Our top picks

Ballu Ballu NCA1-4.3EF-20 (2 kW)

Best overall

Ballu Ballu NCA1-4.3EF-20 (2 kW)
9.1/10about £149.99
View offer
Dimplex Dimplex ML2TSTie7 (2 kW)

Rank 2

Dimplex Dimplex ML2TSTie7 (2 kW)
8.4/10about £75.99
View offer
BLACK+DECKER BLACK+DECKER BXCV41001GB (2.2 kW)

Best value

BLACK+DECKER BLACK+DECKER BXCV41001GB (2.2 kW)
8.8/10about £36.89
View offer
On this page
  1. 1.Where it stands
  2. 2.The plug and the lead
  3. 3.Thermostat and timer
  4. 4.Stop using it

Where it stands

Stand the heater on a flat floor, not on a bed, chair or stack of books. Electrical Safety First asks for about one metre of clearance from curtains, furniture and bedding, and says do not cover the appliance or dry clothes on it. The grille and top can still burn skin. Keep the air path open. Blocking the intake or outlet can overheat the case where a cut-out exists. Russell Hobbs, Devola, Ballu and HeatLite list that protection. A cut-out is a last resort, not a layout tool. Tighten foot screws on setup. UK reviews on Dimplex ML and BLACK+DECKER mention loose screws after a move. Do not tuck the heater under a desk. Unplug and let it cool before you carry it. Wattage sits on the convector buying guide.

The plug and the lead

Plug into a wall socket you can see. Electrical Safety First advises against extension leads and reels for portable heaters, because coiled cable and underrated strips overheat. Daewoo reviews often say the cable is short, which tempts a reel. Move the furniture, or choose a stated longer cable such as the 1.5 m lead on Devola and Dimplex ML. UK plugs are BS 1363, fused at 13 A. A 2 kW convector on 240 V is a heavy but normal load. A 3 kW Dimplex ML3 sits at the plug ceiling. If the faceplate is loose, or the circuit already runs a kettle and a microwave, use 2 kW or ask an electrician. Do not run two heaters on one strip. If the plug, socket or lead feels hot, switch off and unplug. Devola and Daewoo UK reviews describe very hot or burnt plugs. That is a stop signal.
Ballu Ballu NCA1-4.3EF-20 (2 kW)

Testsieger

Ballu Ballu NCA1-4.3EF-20 (2 kW)
9.1/10about £149.99
View offer

Thermostat and timer

Set the thermostat high enough to call for heat, then lower it once the room is comfortable so the element cycles. A dial left on maximum costs more without warming the room faster in a useful way. Steps of 800 W on Russell Hobbs or 840 W on BLACK+DECKER cut draw only while selected. Electrical Safety First says do not leave portable heaters on unattended or while you sleep. A 7-day timer on Dimplex ML suits office hours, though UK reviews say the display sits near the floor and programming is fiddly. Devola’s weekly periods and Russell Hobbs’s 1–24 hour countdown suit other habits. Ballu adds app schedules if you set them in daylight. HeatLite and BLACK+DECKER do not list a built-in timer. A separate plug-in timer must be rated for the load. Do not override a tip-over switch. The sums are on convector running cost.

Stop using it

Unplug if you smell smoke or burning plastic. Russell Hobbs reviews include a smoke report. Treat haze as an immediate shutdown. Unplug if the RCD trips repeatedly, the case cracks, or the feet collapse. Only Devola states IP24. A bathroom room-type without an IP code is not approval to use a plug-in heater near water, and legacy Zone 3 wording does not override UK socket rules. Do not run an extension lead into a bathroom. Call a registered electrician for a fused spur, an uncertain 3 kW circuit, a fixed heater in a wet room, or a socket a hot plug may have damaged. If the appliance fails early, use your consumer rights. Several UK reviews describe units dying in weeks. Oil-filled heat is on convector vs oil-filled radiator.

Common questions

Can I use an extension lead if the cable is short?
Electrical Safety First advises no for portable heaters. Coiled cable and underrated strips overheat. Move the heater or the furniture, or pick a model whose stated cable reaches, such as the 1.5 m lead on Devola and Dimplex ML.
Can I dry towels on it?
No. That covers the heater, risks fire, and defeats overheat protection. Use a proper airer away from the convector, outside the one-metre clearance.
Can I leave it on overnight?
Safety guidance says do not leave portable heaters on while you sleep or unattended. Use a timer to switch off before bed, or heat the room earlier and switch off when you get under the duvet.
What do I do if the plug is hot?
Switch off, unplug, and do not use the heater until a qualified person has checked the socket and the plug. Scorch marks or a smell of hot plastic belong in the same stop. Devola and Daewoo UK reviews describe very hot or burnt plugs.
How do I set a 7-day timer if the display is at floor level?
Programme it once while you are kneeling, or with the unit on a stable raised surface during setup, then stand it in its final position. If you cannot read the display, a model with app control or a higher panel may suit you better. That is a buying choice, not a mirror on the floor.
When do I call an electrician?
For fixed installs, repeated hot sockets, uncertain circuit capacity for 3 kW, or any plan to put heat in a bathroom beyond what a plug-in dry-room model allows. A bathroom room-type on a listing is not a wiring certificate.

Related pages

Best convector heater

Convector

Convector heater buying guide: watts, timer, mount

Convector heater running cost at the 2026 price cap

Convector heater vs oil filled radiator for a UK room

Sources

Public UK sources named below. amazon.co.uk prices, stars and review counts on these nine listings were taken from the listing files, not a live check on 20 October 2026. Page updated October 2026.

  1. Ofgem price cap, 1 October to 31 December 2026 (retrieved 20 October 2026)
  2. Centre for Sustainable Energy, room heaters (retrieved 20 October 2026)
  3. Regulation 2015/1188 Annex II (retrieved 20 October 2026)
  4. GOV.UK ecodesign guidance (retrieved 20 October 2026)
  5. BEIS off-gas-grid electric heating (retrieved 20 October 2026)
  6. Electrical Safety First, portable heaters (retrieved 20 October 2026)
  7. SELECT, BS 7671 Section 701 (retrieved 20 October 2026)
  8. AMDEA, appliances in bathrooms (retrieved 20 October 2026)