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Bathroom fan heater buying guide

Updated: October 2026

You have a towel rail that never catches the room in the first ten minutes of a shower, and the amazon.co.uk title already says bathroom. That word is not a check. A bathroom fan heater buying guide for a UK tiled room starts with the printed IP code, then the plug or fused spur, the hidden 1 kW switch, the timer and the voltage field. This page walks those checks across the five heaters in our [bathroom fan heater comparison](/hub/portable-heaters/bathroom-fan-heater). It does not pick a winner. There is no lab test. A qualifying purchase can earn a commission at no extra cost to you.

You have a towel rail that never catches the room in the first ten minutes of a shower, and the amazon.co.uk title already says bathroom. That word is not a check.

Our top picks

Dreo Dreo DR-HSH017S

Best overall

Dreo Dreo DR-HSH017S
7.0/10about £119.99
View offer
Winterwarm Winterwarm WWDF20E

Rank 2

Winterwarm Winterwarm WWDF20E
8.6/10about £59.99
View offer
TCP TCP Smart 2000 W

Best value

TCP TCP Smart 2000 W
7.8/10about £60
View offer
On this page
  1. 1.Check the IP code before the title
  2. 2.Plug, fused spur, or a voltage that is not UK mains
  3. 3.The 1 kW switch and the timer are different jobs
  4. 4.What this set can and cannot tell you

Check the IP code before the title

The second digit of an IP code is the water digit. Digit 2 is dripping water when the unit is tilted. Digit 4 is splash from any direction. BS 7671 Section 701 asks for at least IPX4 in zones 1 and 2. Winterwarm and TCP print IP22. Dreo prints IP24 and does not say zone 1. Sandrem and Eterna print no code. Zone distances are on the bathroom heater IP rating page.

Plug, fused spur, or a voltage that is not UK mains

UK mains are 230 V nominal. The Winterwarm bullets say no plug, only three-core wiring to a fused spur with an earth. That is a registered electrician’s job. In England and Wales, new bathroom work is notifiable under Part P. That is not a Scotland rule. Do not run an extension lead into the room. TCP prints 220–240 V, and reviews describe a 13 A plug on a flex of about 1.5 m or 2 m. SELECT allows that socket only beyond 2.5 m from the zone 1 boundary, on a 30 mA RCD. Sandrem at £38.94 and Dreo at £119.99 both print 120 V.
Dreo Dreo DR-HSH017S

Testsieger

Dreo Dreo DR-HSH017S
7.0/10about £119.99
View offer

The 1 kW switch and the timer are different jobs

On the Winterwarm and the Eterna, 1 kW or 2 kW is set at installation. The pull cord starts the run. It does not choose the kilowatts. Several Winterwarm units arrived on 1 kW until the internal switch was moved. The Winterwarm states a 30-minute run. The Dreo states 24 hours. The TCP claims schedules, and one review says it came on after a power cut. Ofgem’s Direct Debit unit rate for 1 October to 31 December 2026 is 26.32 pence per kWh, so 30 minutes at 2 kW is about 26 pence before the 54.83 pence daily standing charge.

What this set can and cannot tell you

Sandrem is £38.94, Eterna £41.99, Winterwarm £59.99, TCP £60 and Dreo £119.99. Use £59.99 for this Winterwarm ASIN, not a £51 snippet. A Dimplex FX20EIPX4 at other UK merchants, about £96 to £122, is an IPX4 downflow used as context. It is not a sixth row. The Dreo’s 4.6 from 2,962 reviews is mostly workshops and cabins. Nothing here is approved for zone 1 unless a manual says so. The conditional pick is the best bathroom fan heater page.

Common questions

What should you check first on a bathroom fan heater?
Check the IP code before the word bathroom. In zones 1 and 2, Section 701 asks for at least IPX4. Winterwarm and TCP print IP22, Dreo prints IP24 without a zone-1 sentence, and Sandrem and Eterna print no code. Then check the supply and the voltage field. A 120 V line fails the listing even when the title sounds right.
Is IP22 enough for a UK bathroom?
No. IP22 has water digit 2, dripping water when the unit is tilted, not splash from any direction. Section 701 asks for at least IPX4 in zones 1 and 2. Winterwarm and TCP both print IP22 and both say bathroom. That wording does not move the digit. Outside the zones the maker’s instructions still apply.
Does a bathroom fan heater come with a plug?
Sometimes. The Winterwarm bullets say no plug, only three-core cable to a fused spur with an earth. TCP reviews describe a fitted 13 A plug on a short flex. Eterna reviews describe a terminal block. A plug only helps if a legal socket already exists. An extension lead is the wrong fix.
Should you choose 1 kW or 2 kW?
Use 1 kW for a small room and 2 kW for the boost, then see where that choice lives. On the Winterwarm and the Eterna it is an install switch, not the pull cord. Several Winterwarm units arrived on 1 kW until that switch was moved. On a hard-wired heater the cover comes off only with the supply isolated.
Why does a listing say 120 V?
Because the amazon.co.uk page has printed a non-UK voltage. Sandrem and Dreo both show 120 V. UK mains are 230 V nominal. Do not fit either heater until the carton says 220–240 V and the plug is BS 1363, or an electrician has confirmed the spur. A high star count does not correct the field.
Who has to fit a hard-wired bathroom heater?
A registered electrician. The Winterwarm states no plug, and three-core wiring to a fused spur with an earth. In England and Wales that bathroom work is notifiable under Part P. Do not treat Part P as a Scotland rule. Do not open a live spur, and do not cut a plug off a TCP flex as a weekend job.
What does half an hour at 2 kW cost on the current price cap?
About 26 pence of unit charge, before the standing charge. Ofgem’s average Direct Debit rate from 1 October to 31 December 2026 is 26.32 pence per kWh, and 30 minutes at 2 kW is 1 kWh. The daily standing charge in that cap is 54.83 pence. Your tariff can differ. It says nothing about whether the heater is allowed in the zone.

Related pages

Downflow or plug-in bathroom fan heater

How to use a bathroom downflow heater

Bathroom fan heater

Best bathroom fan heater: who to buy and who to skip

Bathroom heater IP rating: IP22, IP24 and zone rules

Sources

Public UK sources for bathroom zones, IP codes, plugs and the hourly arithmetic. Listing prices, stars and review counts are from amazon.co.uk. Last checked 21 October 2026.

  1. Electrical Safety First — Bathroom (retrieved 21 October 2026)
  2. SELECT pocket guide — BS 7671:2018+A2:2022 Section 701 (retrieved 21 October 2026)
  3. IET — Section 701 note (retrieved 21 October 2026)
  4. Approved Document P (2013) (retrieved 21 October 2026)
  5. Electrical Equipment (Safety) Regulations 2016 — guidance (retrieved 21 October 2026)
  6. BS EN 60335-2-30 — room heater safety scope (retrieved 21 October 2026)
  7. Assimilated regulation 2015/1188 Annex II (retrieved 21 October 2026)
  8. Ofgem — energy price cap, 1 October to 31 December 2026 (retrieved 21 October 2026)