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15 kW fan heater buying guide

Updated: October 2026

A cold workshop often starts as a search for a 15 kW fan heater, and amazon.co.uk mixes two fuels into that number. This buying guide asks what is already on the wall before it asks which case to buy. You either have 400 V three-phase, you can run a propane blower whose fan still needs a socket, or you only have a 13 A plug and need a much smaller heater. The [15 kW fan heater comparison](/hub/portable-heaters/15kw-fan-heater) holds the four-row table. This page is the order of questions, and it does not crown a model. Figures are from those amazon.co.uk listings on 15 October 2026.

A cold workshop often starts as a search for a 15 kW fan heater, and amazon.co.uk mixes two fuels into that number. This buying guide asks what is already on the wall before it asks which case to buy.

Our top picks

DAHTEC DAHTEC IFHO3-150G black

Best overall

DAHTEC DAHTEC IFHO3-150G black
5.2/10about £186.15
View offer
DAHTEC DAHTEC BGA1401-15-18 gas

Alternative

DAHTEC DAHTEC BGA1401-15-18 gas
4.4/10about £84.15
View offer
ALINI ALINI ALINI15GH propane

Best value

ALINI ALINI ALINI15GH propane
4.9/10about £75.99
View offer
On this page
  1. 1.What “15 kW fan heater” is returning
  2. 2.The supply test
  3. 3.The four listings in this set
  4. 4.What to leave for another page

What “15 kW fan heater” is returning

The phrase returns three kinds of machine, and only two stayed in this set. The electric rows are floor-standing coil blowers whose bullets require 380–400 V three-phase and forbid a standard 220–240 V household socket. The gas rows are forced-air blowers around 4–5 kg with piezo ignition, and both still need mains for the fan. A 1.5–2.8 kW ceramic from the same search was the wrong power class, so it is not in the table. If you can only point at a BS 1363 socket, Electrical Safety First puts a 13 A fuse near 3,000 W. The next page is the plug-in fan heater comparison.

The supply test

Match the listing to the outlet before the kilowatt figure means anything. The Health and Safety Executive describes public supply as 230 V single-phase and 400 V three-phase, and workplace equipment has to suit the place. The DAHTEC electric pages, model IFHO3-150G, state a 1.60 m lead and do not name the plug. Other UK 15 kW sheets name a 32 A five-pin connector. These Amazon pages do not print it. If three-phase is already in the workshop, confirm it is the right outlet, with an electrician when you are not sure. A new circuit in a dwelling in England is notifiable under Approved Document P. Scotland, Wales and Northern Ireland do not use that English document. When the supply is not real, stop before the basket.
DAHTEC DAHTEC IFHO3-150G black

Testsieger

DAHTEC DAHTEC IFHO3-150G black
5.2/10about £186.15
View offer

The four listings in this set

Two rows are colours of one electric model. Black ASIN B0FFYMDQZ5 and silver ASIN B0FFY14ZKQ are both DAHTEC IFHO3-150G at £186.15, with steps of 95 W, 5 kW, 10 kW and 15 kW. The only review is one shared text, so a 5.0 on each colour is not two tests. The gas rows cost less at the till. DAHTEC BGA1401-15-18, ASIN B0FG2F1SF8, is £84.15, with 1.09 kg/h and an empty fuel field. ALINI ALINI15GH, ASIN B0FRZCCX6S, is £75.99 and names propane, a regulator, a 1.5 m hose and a UK 3-pin plug for the fan. Who each row fits is on the best 15 kW fan heater page.

What to leave for another page

Running cost comes only after a supply is possible. The till gap is £186.15 against £84.15 and £75.99. That is the purchase price, not the cost of an hour’s heat. The hourly arithmetic sits on the 15 kW electric or gas heater page. All four usage fields say Indoor, and the titles still say garage. UK guidance on flueless heaters keeps them out of spaces where petrol vapour may be present. If the socket, the fuel and the room do not line up, leave the heater in the search results.

Common questions

Will a 15 kW electric fan heater run from a normal UK plug?
No. The DAHTEC IFHO3-150G bullets require 380–400 V three-phase and forbid a standard 220–240 V household socket. Electrical Safety First puts a 13 A socket near 3,000 W, about a fifth of 15 kW. The pages state a 1.60 m lead and do not name the plug.
Are the black and silver DAHTEC listings two different heaters?
They are two listings of one model, IFHO3-150G, both at £186.15, with the same steps, the same airflow line and one shared review. The silver page adds a 4-speed field and a 40°C maximum beside a 140°C heat-output field. A second 5.0 does not mean a second buyer tested a different machine.
Is the gas heater a way to avoid three-phase?
It avoids the 400 V heating supply, and the fan still needs a socket. Both gas listings need mains power. The ALINI names a 230 V UK 3-pin plug. The DAHTEC gas page leaves the voltage unstated and prints 700 mbar. You also take on a burn around 1.09 kg/h.
Does the gas heater still need a socket?
Yes. The heat comes from the burner and the fan is mains-powered on both gas listings. The ALINI states a UK 3-pin plug at 230 V, plus a regulator and a 1.5 m hose. The DAHTEC BGA1401-15-18 says the power source is AC and leaves the voltage unstated, while reviews still describe a mains lead.
When is a plug-in heater the honest alternative?
When the building has only a 13 A socket and you are not installing a new circuit. A 15 kW title will not pass a socket whose ceiling is about 3 kW.
Who installs a new three-phase outlet in a house in England?
An electrician does. A new circuit in a dwelling in England is notifiable under Approved Document P. Plugging into an outlet that is already there is a different job, and this page does not describe the wiring. Scotland, Wales and Northern Ireland are outside that English document.

Related pages

15 kW heater for a garage

15 kW fan heater

Best 15 kW fan heater UK: which listing should you buy

15 kW electric or gas heater: hourly cost compared

How to use a 15 kW fan heater before you switch on

Sources

Public UK sources for supply, gas safety, and the hourly arithmetic. Listing prices, stars, and review counts are from amazon.co.uk on 15 October 2026.

  1. HSE — Electrical equipment at work (retrieved 15 October 2026)
  2. HSE HSR25 — Memorandum of guidance on the Electricity at Work Regulations 1989 (retrieved 15 October 2026)
  3. HSE — Carbon monoxide in construction (retrieved 15 October 2026)
  4. Gas Safety (Installation and Use) Regulations 1998 (retrieved 15 October 2026)
  5. Approved Document P — Electrical safety in dwellings (retrieved 15 October 2026)
  6. Ofgem — Energy price cap, 1 October to 31 December 2026 (retrieved 15 October 2026)
  7. Electrical Safety First — Plugs and fuses (retrieved 15 October 2026)
  8. Calor — LPG bottle prices (retrieved 15 October 2026)