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3000W vs 2000W fan heater

Updated: 21 October 2026

You are looking at a 3 kW fan heater beside a 2 kW alternative. A 3000W vs 2000W fan heater choice is mostly arithmetic and the room in front of you. While the element is fully on, 3000 W costs more per hour than 2000 W at the same unit rate. It is the right boost only when 2000 W is too slow for that room. The model grid stays on the [3000W fan heater comparison](/hub/portable-heaters/3000w-fan-heater). Peter F. used Ofgem’s October 2026 cap, Electrical Safety First’s appliance ratings, and the six amazon.co.uk listings from 19 October 2026. A room was not measured. A qualifying purchase can earn a commission at no extra cost to you.

You are looking at a 3 kW fan heater beside a 2 kW alternative. A 3000W vs 2000W fan heater choice is mostly arithmetic and the room in front of you.

Our top picks

Black+Decker Black+Decker BXSH37006GB fan heater

Best overall

Black+Decker Black+Decker BXSH37006GB fan heater
8.2/10about £24.99
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Swan Swan SH27030N fan heater

Best value

Swan Swan SH27030N fan heater
8.0/10about £19.99
View offer
Benross Benross 42450 industrial fan heater

Alternative

Benross Benross 42450 industrial fan heater
7.6/10about £49.99
View offer
On this page
  1. 1.The same hour, two powers
  2. 2.What the extra kilowatt is for
  3. 3.The socket, not the slogan
  4. 4.What does not change the bill

The same hour, two powers

Ofgem’s Direct Debit average for England, Scotland, and Wales, from 1 October to 31 December 2026, is 26.32 p/kWh. Northern Ireland is outside the average. A true 2000 W hour is about 53 pence. A true 3000 W hour is about 79 pence. A 1500 W step is about 39 pence for that hour. Do not revive 34 p/kWh, which is what the Benross page uses for an older £1.02 hour. A thermostat saves money by switching the element off, not by making 3000 W cheaper per unit. How the dial is used is on the how to use a 3000W fan heater page.

What the extra kilowatt is for

The extra kilowatt is a faster boost in one room you are sitting in. One Staywarm reviewer found it stronger than a 2 kW heater they owned. One SISUPASSIE reviewer found less heat than their 2000 W heater. Neither sentence is a lab result. 2000 W is the better buy when the room is small or you do not want the socket at about 13 A. If you will leave 3000 W on for long stretches, budget about 79 pence an hour. If 2000 W is enough, shop that wattage with the same socket rules. The 3 kW checklist is on the 3000W fan heater buying guide.
Black+Decker Black+Decker BXSH37006GB fan heater

Testsieger

Black+Decker Black+Decker BXSH37006GB fan heater
8.2/10about £24.99
View offer

The socket, not the slogan

3000 W at 230 V is about 13.0 A. 2000 W at 230 V is about 8.7 A. Both are arithmetic, not a clamp-meter reading. Electrical Safety First puts a typical fan heater in the 2000–3000 W band, up to 13 A. Which? treats one socket as about 3000 W, so a 3 kW heater plus anything else hungry on that outlet is already the overload case. Swan states 240 V and 12.5 A, which matches 3000 W divided by 240. Benross states 220 V and 13.64 A, above 13 A. Black+Decker’s 25000 mA field does not match 3 kW at 240 V. Ignore it. A 2000 W heater is still a high load. A workshop socket is on the 3000W fan heater for a garage page.

What does not change the bill

The element type does not change the unit rate. SISUPASSIE, the ceramic listing at £49.99, is not a cheaper kilowatt-hour than the Swan at £19.99. A thermostat still only helps by switching off. The standing charge does not change because you bought a fan heater. Keep about 53 pence and about 79 pence as energy only, for a full hour at those watts, in Great Britain, on this cap window. At a true 1500 W you are at about 6.5 A and about 39 pence an hour if the element stays on. Buy 2000 W when that is enough. Use 3000 W as a short boost, then 1500 W, when the room is slow.

Common questions

Is 3000 W warmer than 2000 W?
It can put more heat into the air per minute while the element is fully on, which is why some reviewers call a 3 kW unit faster than a 2 kW heater they owned. It does not guarantee a warmer room if the space is large, draughty, or only heated for a few minutes. One review in the SISUPASSIE file reports the opposite experience. Warmth here stops when the fan stops.
How much more does an hour cost?
On 26.32 p/kWh, about 79 pence at a true 3000 W against about 53 pence at a true 2000 W, before the standing charge. The gap is about 26 pence for that full hour. 1500 W on the same heater is about 39 pence. These sums are for England, Scotland, and Wales in the 1 October to 31 December 2026 cap. They are not a Northern Ireland tariff.
Does a thermostat make 3000 W cheaper than 2000 W?
Only if it switches the element off for part of the hour. The price of each kilowatt-hour stays 26.32 p while power is being drawn. A 3 kW heater that never cycles will cost more per hour than a 2 kW heater that never cycles. The thermostat is a control, not a discount.
When is 1500 W the better setting on a 3000 W heater?
After the room is warm enough, or from the start if you only need to take the edge off. You then draw about half the 3000 W energy and less current than a 2000 W heater. Status reviewers who see the high setting cut out after about five minutes are already living on that lower step.
Is 3000 W too much for a small bedroom?
It can be more than the room needs if 1500 W already feels enough. You can still own a 3 kW heater and leave it on the low setting. Hours at 3000 W on a tired socket are the case to avoid.
What current is 2000 W compared with 3000 W?
About 8.7 A at 2000 W and about 13.0 A at 3000 W, both at 230 V. That is arithmetic. Swan’s printed 12.5 A is the coherent 240 V version of a 3000 W load. Benross’s 13.64 A is above a 13 A plug. A 2000 W heater leaves more spare capacity on the same socket.

Related pages

Best 3000W fan heater

3000W fan heater

3000W fan heater buying guide: socket, room, and cost

3000W fan heater for a garage: one supervised hour

How to use a 3000W fan heater: plug, gap, and stop

Sources

Public UK sources for the plug, the one-metre gap, bathroom zones, and the unit rate. Listing prices, stars, and review counts are the amazon.co.uk figures in this set, checked 19 October 2026.

  1. Electrical Safety First — Portable heaters (retrieved 19 October 2026)
  2. Electrical Safety First — Ratings of appliances (retrieved 19 October 2026)
  3. Plugs and Sockets etc. (Safety) Regulations 1994 (retrieved 19 October 2026)
  4. GOV.UK — Electrical Equipment (Safety) Regulations 2016 (retrieved 19 October 2026)
  5. Ofgem — Energy price cap, 1 October to 31 December 2026 (retrieved 19 October 2026)
  6. Devon and Somerset Fire and Rescue — Heater safety (retrieved 19 October 2026)
  7. SELECT — BS 7671 Section 701 (retrieved 19 October 2026)
  8. HSE — INDG236 Maintaining portable electrical equipment (retrieved 19 October 2026)