Infrared mirror heater buying guide
Updated: 22 October 2026
You are pricing a bathroom refit and the mirror and the heater are fighting for the same wall. An infrared mirror heater buying guide should settle four things before you shortlist a brand: whether the product is actually a heated mirror, how many watts the room can use, how you will control it, and what the electrician adds to the amazon.co.uk price. This page is the method. The four kept listings are on the [infrared mirror heater comparison](/hub/heating/infrared-mirror-heater). Peter F. used the amazon.co.uk files in this batch and named UK sources. This is not a lab test. If you buy through our links, we may earn a commission at no extra cost to you.
You are pricing a bathroom refit and the mirror and the heater are fighting for the same wall.
You are pricing a bathroom refit and the mirror and the heater are fighting for the same wall. An infrared mirror heater buying guide should settle four things before you shortlist a brand: whether the product is actually a heated mirror, how many watts the room can use, how you will control it, and what the electrician adds to the amazon.co.uk price. This page is the method. The four kept listings are on the infrared mirror heater comparison. Peter F. used the amazon.co.uk files in this batch and named UK sources. This is not a lab test. If you buy through our links, we may earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Title watts | Control | Listed weight | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Mirrorstone Mirrorstone round 320 W | 320 W title; bullet 580 W | Wi-Fi claimed | 2.6 kg on Amazon | 6.2 | about £282.99 | View offer |
 Radi8 Radi8 450 W rectangle | 450 W, lines agree | External thermostat | 12.3 kg | 8.1 | about £285.00 | View offer | |
| Best value |  Radi8 Radi8 round 320 W | 320 W title; field 580 W | External thermostat | 15 kg | 6.9 | about £250.00 | View offer |
On this page
What counts as a mirror heater here
In this comparison a mirror heater is a wall-mounted electric radiant panel whose face is a tempered mirror. You are buying one surface that you look into and that throws heat into the room. It is not a plain white infrared panel, a patio heater, or a portable fan heater. The four listings that remain are two rounds around 850 mm and two Radi8 rectangles, 800 × 600 mm and 1200 × 600 mm. All four print IP54. None of the files prints a BS 1363 plug, so treat an unmarked lead as an electrician check.
The mirror face gets hot. Covering it with a towel blocks the radiant surface. A line about demisting is marketing unless the maker documents it. Energy Saving Trust treats infrared as direct electric heat. It is not cheaper per unit than any other electric heater at the same watts, and it is a poor whole-house replacement for gas.
How many watts for the room you have
Retailer guides of roughly 50–80 watts per square metre are a rule of thumb, not a heat-loss calculation. Mirrorstone’s UK spec sheet pairs a 320 W round with about 6–7 square metres. At 50 W/m² a 450 W panel is in the region of 9 square metres, and a 700 W panel is in the region of 14 square metres. At 80 W/m² those same panels cover less floor area. A small cloakroom and a family bathroom with an outside wall are not the same job.
Radi8’s round and Mirrorstone’s round are titled 320 W. The 450 W rectangle, model MH8060M450, agrees across title and heat-output field, and the 700 W rectangle agrees too. The rounds do not. Radi8’s heat-output field says 580 W. Mirrorstone’s bullet says 580 W and about 9–10 square metres, while the heat-output field prints 120 °C rather than watts. Check the nameplate, then choose the band that matches the room. Who each listing is for is on best infrared mirror heater.
Wi-Fi against a non-thermostat panel
Control changes the real price. Radi8 sells the three panels in this set as non-thermostat: no built-in thermostat, Wi-Fi or remote, with an external thermostat that can be paired, including Radi8 smart options. You pay for that stat, and for the electrician, on top of £250.00, £285.00 or £349.99. Without a stat or timer the panel runs at full power whenever it is switched on.
Mirrorstone’s round, at £282.99, is the only listing that claims Wi-Fi from a phone or tablet. The spec table does not name a thermostat. A maximum temperature setting field reads 45 °C. amazon.co.uk shows 5.0 from a single rating and no review text, so the app claim is a bullet. The extra over the Radi8 round is about £33. Confirm the Wi-Fi line with the seller before you treat it as the connected choice.
Electrician costs and lines that disagree
The panel price is the smaller half of many bathroom jobs. Hard-wiring, a fused connection and a 30 mA RCD on the bathroom circuit are electrical work, and in England and Wales that work is often notifiable under Part P. Scotland and Northern Ireland use their own rules. The call-out sits outside the amazon.co.uk price.
Weight belongs in the same budget. The Radi8 round lists 15 kg, the 450 W rectangle 12.3 kg and the 700 W rectangle 17.8 kg. Mirrorstone’s amazon.co.uk row prints 2.6 kg, while the maker sheet for the 850 mm 320 W round quotes about 10 kg. A stud wall that cannot take the real weight needs better anchors. On delivery, read the nameplate. In this batch the 450 W and 700 W rectangles match. The two rounds do not.
Common questions
Is 320 W enough for a cloakroom?
It can be, if you treat 50–80 W/m² as a rule of thumb and the cloakroom is small. Mirrorstone’s own sheet pairs 320 W with about 6–7 square metres. A cold room with an outside wall may want more than the low end of that band. The Radi8 and Mirrorstone rounds are the 320 W titles in this set, and both have a conflicting higher watt line, so confirm the plate. A 320 W panel is a poor sole heater for a large family bathroom.
What does non-thermostat mean?
On a Radi8 title it means the panel does not include its own thermostat, Wi-Fi or remote. The bullets say an external thermostat can be used. It does not mean the heater cannot be controlled, and it does not mean you should leave it on a fused spur with no timer. Add the cost of that external control to £250.00, £285.00 or £349.99 before you compare it with a Wi-Fi listing.
How much does 450 W cost per hour?
At the Ofgem Direct Debit unit rate of 26.32 pence per kilowatt-hour for 1 October to 31 December 2026, 450 W at full power is about 12 pence an hour. A 320 W title is about 8 pence and 700 W is about 18 pence, before the 54.83 pence daily standing charge. A thermostat or timer reduces the hours, not the unit rate. This is price-cap arithmetic, not a reading from your meter.
Can I plug a mirror heater into a bathroom socket?
Not on the evidence in these files. None of the four listings prints a BS 1363 plug, and ordinary bathroom sockets must sit at least 2.5 metres from the zone 1 boundary. Radi8’s bullets describe professional hard-wiring in the correct zone. A plug over the bath is the mistake this category keeps producing. The zone detail is on the bathroom zones page.
What if the box watts differ from the title?
Trust the nameplate over a conflicting bullet, and query the seller if they disagree. In this batch the Radi8 450 W and 700 W rectangles match across title and heat-output field. The two rounds do not: 320 W in the title against 580 W elsewhere. Do not install a panel whose plate you have not read, and do not assume the higher number is free extra heat.
How do Mirrorstone and Radi8 differ on control?
Radi8 states external thermostat compatibility and says there is no built-in Wi-Fi. Mirrorstone claims phone or tablet control in a bullet, with a thin review sample of one amazon.co.uk rating. Radi8’s rectangles also agree on watts, which Mirrorstone’s round and Radi8’s own round do not. If app control is the priority, verify Mirrorstone’s claim. If a clean watt line matters more, the 450 W and 700 W Radi8 panels are the clearer files.
Related pages
Sources
Public UK sources named below. amazon.co.uk prices, stars and review counts on these four listings were taken from the listing files. Page updated October 2026.
- Energy Saving Trust, infrared heating explained (retrieved 20 October 2026)
- Ofgem price cap, 1 October to 31 December 2026 (retrieved 20 October 2026)
- Electrical Equipment (Safety) Regulations 2016 (retrieved 20 October 2026)
- Plugs and Sockets etc. (Safety) Regulations 1994 (retrieved 20 October 2026)
- Electrical Safety First, bathroom sockets (retrieved 20 October 2026)
- SELECT, BS 7671 Section 701 bathroom zones (retrieved 20 October 2026)
- Mirrorstone mirror infrared panel spec sheet (retrieved 20 October 2026)
- amazon.co.uk listings B0C8V7BNK4, B0DXLJYBQ2, B0DXLHYMCJ, B0DXLJFJR8 (retrieved 20 October 2026)