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Propane heater vs electric fan heater

Updated: 16 October 2026

Both boxes say fan heater. A propane heater vs an electric fan heater is a gas flame of 10–50 kW, exhaust included, against about 2–3 kW from a 13 A plug. Match the room, not the larger number. The Products Compared editorial team set the four gas listings on the [gas heater fan comparison](/hub/portable-heaters/gas-heater-fan) against public UK notes on electric fans, on 16 October 2026. If you buy through our links, we may earn a commission at no extra cost to you. Take electric when the room is small, occupied, or may hold flammable vapour. Take the propane blower only when you need much more heat and the ventilation page allows the room.

Both boxes say fan heater. A propane heater vs an electric fan heater is a gas flame of 10–50 kW, exhaust included, against about 2–3 kW from a 13 A plug. Match the room, not the larger number.

Our top picks

SIAL SIAL Q10A 10 kW gas fan heater

Best overall

SIAL SIAL Q10A 10 kW gas fan heater
5.0/10about £69.90
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DAHTEC DAHTEC BGA1401-15-18 15 kW gas fan heater

Rank 2

DAHTEC DAHTEC BGA1401-15-18 15 kW gas fan heater
5.8/10about £84.15
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ALINI ALINI ALINI15GH 15 kW propane fan heater

Preis-Tipp

ALINI ALINI ALINI15GH 15 kW propane fan heater
5.4/10about £75.99
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On this page
  1. 1.Two different machines
  2. 2.How much heat each can deliver
  3. 3.What an hour costs
  4. 4.Fumes, noise and where each fails
  5. 5.Which to choose

Two different machines

The propane units burn LPG in the open and use a small electric fan to throw the hot air. The plug does not make the heat. A 15 kW figure is the flame, not a 15 kW draw from the socket. If the power is off, the fan stops. SIAL’s listing says the gas shuts off if power fails. The other listings do not print that line. These are not blackout heaters. An electric fan heater has no bottle and no flame. There is no 15 kW from a normal 13 A plug. The gas blower fails where vapour, sleeping or stale air rules out a flame, which is propane heater ventilation. The electric fan fails when 2–3 kW cannot lift a large leaky shed.

How much heat each can deliver

The gas listings state 10 kW, 15 kW and 30–50 kW. ALINI and the 15 kW DAHTEC state 1.09 kg/h. One review describes a double garage warm in about 10 minutes. Several say you cannot turn that DAHTEC down. Electrical Safety First still lists fan heaters up to 3,000 W on a 13 A plug. The IET, in Wiring Matters in September 2025, treats a 3 kW load at 230 V as generally unsuitable for a long run on a 13 A plug, with a practical full-power limit near 2.7 kW. A trade guide of 50–70 W per square metre would put a 20 m² garage near 1–1.4 kW. That is a rule of thumb, and it does not override petrol vapour.
SIAL SIAL Q10A 10 kW gas fan heater

Testsieger

SIAL SIAL Q10A 10 kW gas fan heater
5.0/10about £69.90
View offer

What an hour costs

Calor’s online exchange price for 13 kg of propane was £45.50. Divided by 13 and multiplied by 1.09 kg/h, that is about £3.80 of gas an hour, before the fan’s electricity. That is arithmetic, not your bill. SIAL and the 30–50 kW DAHTEC state no burn rate. Do not apply £3.80 to the larger machine. The Centre for Sustainable Energy uses 55p an hour for a 2 kW fan on their example, not an Ofgem cap. On those two figures, the gas hour costs more and buys more heat. A short burst in a small room still favours the plug, because you are not opening a 13 kg bottle for twenty minutes.

Fumes, noise and where each fails

Only the propane side makes fumes, so you need the manual’s ventilation, a BS EN 50291 alarm, and no petrol vapour. The electric fan does not burn fuel. Its advantage beside stored fuel is the lack of a flame. SIAL, ALINI and the 15 kW DAHTEC reviews call the blowers loud. An electric fan is the usual choice when you need to talk. The electric fan fails when 2 kW cannot catch a draught, and on a long 3 kW run if the IET’s caution applies. The propane blower fails a bedroom, a bathroom and a petrol garage even when the gas looks cheap. An indirect heater, with the exhaust outside, is a different product.

Which to choose

Choose the electric fan when the space is a single garage you use occasionally, a room people stay in, or anywhere petrol vapour or solvent may be present. Plan on about 2–2.7 kW for a long run. Choose a propane fan heater only when you need that extra heat, the room is non-habitable, the vents match the manual, and you accept the cylinder, the noise and the fumes. The best propane fan heater page separates the ALINI, which states the regulator and hose, from the 15 kW DAHTEC, which has the longer review file. If the pressure and the bottle are still unclear, use the buying guide. If the room is the doubt, stay with electric until the ventilation page says the flame is allowed.

Common questions

Which is cheaper per hour?
About £3.80 of propane for an hour at 1.09 kg/h, from Calor’s £45.50 price for 13 kg, against 55p an hour for a 2 kW fan in the Centre for Sustainable Energy’s example. The gas hour buys more heat and only applies where a flame is allowed. Neither figure is your bill. A short electric burst can cost less because you never open a large bottle.
Which heats a large shed faster?
The propane blower, if the shed may have a flame. Fifteen kilowatts is several times a 2–3 kW electric fan, and one DAHTEC review describes a double garage warming in about 10 minutes. That speed comes with noise and exhaust in the room. In a small shed, electric is the better match because the gas unit may have no lower setting.
Can I use the electric fan in a room with petrol?
It has no flame, which is why it is the alternative when Calor rules mobile gas heaters out of garages. That is not permission to store fuel badly or to run 3 kW on a coiled reel. The missing flame removes one ignition source. It does not clear every other risk in the room.
Will the propane unit run if the power is off?
No. The fan is electric. ALINI states 230 V for it. A power cut stops the blower. SIAL’s bullets say the gas shuts off if power fails. These are not blackout heaters. A gas heater with no fan motor is a different product and is not in this set.
Is 3 kW enough for a single garage?
Often, for occasional use in a normal single garage. A guide of 50–70 W per square metre puts 20 m² near 1–1.4 kW, so a 2 kW fan has headroom on that rule of thumb. A tall, leaky garage may still feel cold. For a long evening, the IET’s caution points nearer 2.7 kW than a continuous 3 kW on a 13 A plug.
What if I only need an hour of heat?
Use the electric fan if 2 kW can hold the room and people are in it. You skip the cylinder and the flame. Use propane for that hour only in a large ventilated space with no petrol vapour. At the 1.09 kg/h example, the hour is still about £3.80 of gas, which is a poor trade against a plug in a small room.

Related pages

Portable electric heater comparison

Gas heater fan

Best propane fan heater: a conditional workshop pick

Propane fan heater buying guide: pressure and fuel

How to use a propane fan heater: light and shut down

Propane heater ventilation garage: when not to light

Sources

Public UK sources listed in the research digest, retrieved 16 October 2026. Prices and stars are the amazon.co.uk listing extracts for the four ASINs on that date.

  1. HSE L56, gas safety (retrieved 16 October 2026)
  2. HSE, gas safety checks for landlords (retrieved 16 October 2026)
  3. NHS, carbon monoxide poisoning (retrieved 16 October 2026)
  4. Calor, guidelines for the safe use of mobile heaters (2024) (retrieved 16 October 2026)
  5. Liquid Gas UK, mobile heaters (retrieved 16 October 2026)
  6. Liquid Gas UK, propane and butane cylinders (2022) (retrieved 16 October 2026)
  7. BS EN 1596:1998 scope, mobile non-domestic direct-fired LPG heaters (retrieved 16 October 2026)
  8. GOV.UK, gas appliances enforcement regulations 2018 (retrieved 16 October 2026)