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300W infrared heater buying guide

Updated: 22 October 2026

You are about to pay for a flat 300 W panel on amazon.co.uk, and the listings do not all describe the same job. A 300W infrared heater buying guide has to separate a desk heater from a wall panel sold for about 3–8 m². The four listings in our [300W infrared heater comparison](/hub/heating/300w-infrared-heater) cost £69.99 to £162.00. This page walks the checks in order: wattage, control, what should be in the box, then the plug. A qualifying purchase through our amazon.co.uk links can earn us a commission at no extra cost to you.

You are about to pay for a flat 300 W panel on amazon.co.uk, and the listings do not all describe the same job. A 300W infrared heater buying guide has to separate a desk heater from a wall panel sold for about 3–8 m².

Our top picks

Hocosyme Hocosyme UK-T-300W

Best overall

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

Rank 2

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

Rank 3

Könighaus Könighaus under-desk
4.2/10about £162.00
View offer
On this page
  1. 1.What a 300W infrared heater is actually for
  2. 2.Control, and what the listing must say
  3. 3.Fixings, cable, and the plug
  4. 4.What not to treat as a saving

What a 300W infrared heater is actually for

300 W is 0.3 kW of electric radiant heat. Energy Saving Trust explains infrared as warmth on people and surfaces in the line of sight, while air elsewhere can stay cooler. It is not a replacement for gas central heating. The Könighaus listing at £162.00 says localised heat for legs and feet, not an entire room, and it prints no square-metre figure. The Hocosyme and Byekalt wall panels print about 3–8 m², a very small room if you treat seller guides as guides rather than guarantees. Heat at a seat succeeds if you feel your legs. A box room succeeds if the control and the fixings match.

Control, and what the listing must say

Fixed electric local space heaters above 250 W sit under assimilated Regulation 2015/1188 in Great Britain. A bare on/off switch leaves the panel at 300 W until you switch it off. Overheat protection is a safety cut-out, not a set point. Byekalt C-WK-300W at £79.99 describes a remote with 1°C steps and a weekly schedule. Hocosyme UK-T-300W at £69.99 says programmable thermostat in one field and use a thermostat in the bullets, and a UK review from 24 March 2025 says it needs a separate control. Hocosyme GL at £89.99 recommends a thermostat rather than describing one included. Könighaus names an on/off switch only.
Hocosyme Hocosyme UK-T-300W

Testsieger

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

Fixings, cable, and the plug

Both wall panels list a 1.8 m cable and mounting material. Hocosyme GL adds castor wheels and is also described as wall-mounted or freestanding. Könighaus is freestanding, with no wall kit. Open the box before you drill. A UK review of Byekalt from 4 October 2026 says the wall hooks were missing and steel cables arrived instead. A UK review of the basic Hocosyme treated wheeled feet as an extra of about £29, so do not assume castors in the cheapest wall box. None of the four listings prints BS 1363. Electrical Safety First says to look for that mark on the plug. Confirm it, and a 300 W plate, before the return window closes. If the plug is damaged or not a UK plug, return it. Do not convert it yourself. A splash line or an IP54 bullet is only a flag to read the 300W infrared heater bathroom page, not permission to plug in beside a bath.

What not to treat as a saving

Do not read 98% or graphene as a lower bill. At full power, 300 W is still 300 W. Ofgem’s direct-debit rate of 26.32 p/kWh for 1 October to 31 December 2026 in England, Scotland and Wales, with VAT off electricity, is about 7.9 pence an hour and about 32 pence for four hours. That is a rule of thumb, not how fast you feel warm. A face at up to 120 °C can burn skin. Review counts are thin: 4.4 from three, 3.8 from eight, 5.0 from two with no review text, and no review line on Könighaus.

Common questions

Is 300 W enough for a living room, or only a desk or a very small room?
300 W is not a living-room heater in this set. Wall listings print about 3–8 m². Könighaus refuses a room figure and talks about legs and feet. A large room will feel little change in the air. You may still feel radiant warmth if you sit in front of the panel.
Does the listing include a thermostat, or only the word thermostat?
Byekalt prints a remote and a weekly schedule in the bullets. The basic Hocosyme conflicts between a programmable thermostat field and a use-a-thermostat bullet, with a UK review saying separate control is needed. The portable Hocosyme recommends a thermostat. Könighaus is on/off only. Read the box, not the adjective.
What should be in the box: wall kit, hooks, castors, or only a cable?
Wall panels claim a kit and a 1.8 m cable. Castors are in the portable Hocosyme box. Könighaus is freestanding. Still check hooks on delivery: one UK Byekalt review reported missing hooks, and a basic Hocosyme review treated wheeled feet as an extra of about £29.
How do I confirm a BS 1363 plug and a 300 W rating plate?
Look at the plug and the plate on delivery. None of the four listings prints BS 1363 in the table, so the product in your hand has to prove it. If the pins are wrong or the plate does not match 300 W, use the return route. Do not convert a non-UK plug yourself.
Does 98% or graphene change a 300 W load?
No. While the element is on at full power, you pay for 300 W. A graphene or 98% line does not shrink the fuse load. The nameplate still says 300 W, and at 26.32 p/kWh that hour is still about 7.9 pence.
When is an IP claim a bathroom decision, and when is it not?
When the room is a bathroom or shower room, IP and zones decide whether the install is legal, not the wattage. In a dry bedroom or study, IP is secondary to control and fixings. A splash line on the listing is not permission to plug in beside a bath.

Related pages

Best 300W infrared heater

300W infrared heater under a desk

300W infrared heater

300W infrared heater bathroom zones, IP and sockets

How to use a 300W infrared heater: place and switch on

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)