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How to use a 300W infrared heater

Updated: 22 October 2026

You already have a plug-in 300 W panel, and the manuals online mostly describe hard-wired ceiling panels. How to use a 300W infrared heater in a dry UK room comes down to aiming radiant heat at the person or spot you use, keeping the face clear, and stopping when the plug, fixings, or room type are wrong. The [300W infrared heater comparison](/hub/heating/300w-infrared-heater) lists four amazon.co.uk panels with different mountings. This page assumes a normal socket outside a bathroom. A qualifying purchase through our amazon.co.uk links can earn us a commission at no extra cost to you.

You already have a plug-in 300 W panel, and the manuals online mostly describe hard-wired ceiling panels.

Our top picks

Hocosyme Hocosyme UK-T-300W

Best overall

Hocosyme Hocosyme UK-T-300W
5.4/10about £69.99
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Byekalt Byekalt C-WK-300W

Rank 2

Byekalt Byekalt C-WK-300W
6.8/10about £79.99
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Könighaus Könighaus under-desk

Rank 3

Könighaus Könighaus under-desk
4.2/10about £162.00
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On this page
  1. 1.What you should feel, and what you should not expect
  2. 2.Where to place a plug-in 300W panel
  3. 3.Clearances and what must stay off the face
  4. 4.First switch-on, and when to stop

What you should feel, and what you should not expect

Energy Saving Trust describes infrared as warming people and surfaces in the line of sight, while air elsewhere can stay cooler. At 300 W you feel heat when the panel can see you, not when the whole house reaches one temperature. These panels do not replace gas central heating. A Hocosyme face claimed at up to 120 °C is hot enough to burn skin. A large room will not feel like a radiator at the far wall. A warm legs zone is a different test from a 3–8 m² wall claim.

Where to place a plug-in 300W panel

Match placement to what arrived. The Hocosyme and Byekalt wall panels list a 1.8 m cable and mounting material. Fix them where you sit, upright, with the hot face into the room. Do not mount if hooks are missing. A UK review of Byekalt reported missing wall hooks and steel cables instead, so inventing fixings is not safe use. Hocosyme GL arrives with castor wheels and can also be described as wall-mounted or freestanding. If you roll it, route the cable so nobody trips and keep the face on your chair. If you hang it, use the kit in the box or return it. Könighaus is freestanding for legs and feet. Point it at your shins and knees, not at the carpet across the room. Bags and chair castors under the desk are covered on the 300W infrared heater under a desk page. Other brands’ how-to articles often assume permanent wiring. That is not the first switch-on for these plug-in listings.
Hocosyme Hocosyme UK-T-300W

Testsieger

Hocosyme Hocosyme UK-T-300W
5.4/10about £69.99
View offer

Clearances and what must stay off the face

Do not cover the panel or hang laundry on it. Herschel’s Select XLS manual, for a different 300 W panel, says not to locate within 0.3 m of furniture or curtains, and that the surface can be around 95 °C. That 0.3 m figure is Herschel’s, not a clearance printed for Hocosyme, Byekalt, or Könighaus. It is still a sensible gap for fabric and paper. A retailer guide for other panels says to keep them away from curtains and to remove protective film, because a covered panel is a fire hazard. Peel a visible film before a long run unless your leaflet says otherwise. A sofa against the face blocks heat and airflow around the electronics.

First switch-on, and when to stop

Use a dry-room socket on a 30 mA RCD circuit if your board is modern. Confirm a marked UK plug and a plate that says 300 W. Stop if the plug is damaged or not BS 1363 marked. None of these listings prints that mark, so you check it on delivery. Switch on briefly while you are there. Byekalt can take a modest target on the remote. Hocosyme may have no thermostat in the box, so on/off is only a test. Könighaus should go off when you leave the seat. Call an electrician for a hard-wire, a new circuit, a missing RCD, or any bathroom doubt. Stop if the fixings are missing. Zones are on the 300W infrared heater bathroom page. Full power is about 7.9 pence an hour at 26.32 p/kWh.

Common questions

Where should a 300 W panel face if I want to feel it?
Aim the hot face at your chair or the spot you occupy. Infrared needs a line of sight. A panel heating the back of a bookcase warms the bookcase. At 300 W you should feel the beam on you, not a change in the air at the far side of a large room.
How far from curtains and furniture?
Keep fabric and clutter out of the radiation path. Herschel’s 0.3 m example on a different 300 W manual is a reference, not a printed spec for these four ASINs. A sofa against the face blocks heat and airflow around the electronics.
Can I cover it, or hang a towel on it?
No. Covering a panel is a fire risk in retailer guidance and in Herschel’s manual language for a different 300 W panel. Listing claims of up to 120 °C on a Hocosyme face are hot enough to burn skin. Do not dry laundry on the panel.
Do I remove a film before the first switch-on?
If a protective film is visible, remove it before a long run unless your leaflet says otherwise. A film left on a hot face is the same problem as a cover: it traps heat on the surface and can scorch.
Is a plug-in panel in a dry room a DIY job?
Placement and first switch-on on an existing socket can be DIY if the plug is a marked UK plug and the wall fixings are sound. Hard-wiring, a new circuit, and any bathroom zone are not DIY. Do not invent brackets if the hooks are missing.
What do I do if the plug is not a marked UK plug?
Do not adapt it yourself. Electrical Safety First expects a BS 1363 mark on a UK plug. If the plug is damaged or the pins are wrong, return or replace it through the seller. Cutting the plug off to fit a new lead is electrician work.

Related pages

300W infrared heater buying guide

300W infrared heater

300W infrared heater bathroom zones, IP and sockets

Best 300W infrared heater: schedule, price, or desk

300W infrared heater under a desk for legs and feet

Sources

Public UK sources named below. amazon.co.uk prices, stars and review counts on these four listings were taken from the listing files read on 20 October 2026. Page updated October 2026.

  1. Ofgem price cap unit rates, 1 October to 31 December 2026 (retrieved 20 October 2026)
  2. Energy Saving Trust, infrared heating explained (retrieved 20 October 2026)
  3. IET Section 701, locations containing a bath or shower (retrieved 20 October 2026)
  4. SELECT bathroom guide (retrieved 20 October 2026)
  5. NICEIC bathrooms and electrics (retrieved 20 October 2026)
  6. Electrical Safety First, plugs and fuses (retrieved 20 October 2026)
  7. GOV.UK, placing energy-related products on the UK market (retrieved 20 October 2026)
  8. Herschel Select XLS installation manual (retrieved 20 October 2026)