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UK Reviews of the Best Heavy Duty Electrical Heaters

Heavy duty heaters are a fast method of quickly heating rooms, trailer tents, folding campers, sheds, lofts, basements and garages. They can also be used as a temporary solution, when the main heating breaks down. That is because they are built to last, and also blast out a lot of hot air very quickly. Below we have reviewed, what we believe to be the best models, currently available in the UK market.

There are a good few choices available, and these include heaters from good brands such as Honeywell, Draper, Kingavon JCB and Raygar. These vary in price, style and in size. Typically though they have an output power of around 3,000 watts. They cost on average around £40-50, for the basic models. For something of higher quality, they can get expensive.

Underneath you will find a top 10 table. I have listed the heaters by the "highest buyer rating." I have also included average price points and the name of the appliance. Underneath the table I review each of these in a lot more detail. To heat a garage or a large shed can be quite difficult. There are many ways to do that, and a heavy duty heater is one of those. These are often referred to as industrial or commercial type heaters. 

These can get expensive, if you want something that has high quality. However if you tend to be in your garage, or any outdoor building, for long periods of time, then it is worth the investment.

Top 10 Rated Heavy Duty Heaters

Please note the buyer rating is scored out of a maximum of 100%. The average price is the average of current market prices and is subject to regular change, so always check before making any purchase.

Benross 3000W Industrial Fan Space Heater, Powerful Tilting Heater for Workshop

80% buyer satisfaction based on 500+ online buyer reviews

  • This is an electric fan heater suitable for industrial applications and from a very well known high quality tool brand
  • It has a 3,000 watt motor with dual overheat protection, a fully adjustable thermostat and 2 heat settings (1500 watts/3000 watts)
  • It also has a 40 watt cool air setting that makes this fan perfect for those hot summer days
  • One very useful thing is that you can direct the heater just where you need with the fully tilting design
  • It has a metal casing, and an integrated carry handle
  • It is IPX4 waterproof rated
  • It has a metal casing with a carry handle

AirMaster IFH3H Industrial fan heater 3KW

82% buyer satisfaction based on 50+ online buyer reviews

  • This is an electric industrial fan heater suitable for industrial applications
  • It has thermal control and variable power settings 1 Kw, 2Kw or 3 Kw
  • This is a fan heater so the good news is it is quiet
  • It has an all metal design so that you don't need to worry that the heater will overheat and melt or catch on fire
  • We don't think this is an industrial scale heater but is is ideal for keeping you warm in a garage or shed
  • At this price it is good value for money

The Sealey EH2001 Industrial Fan Heater

68% buyer satisfaction based on 50+ online buyer reviews

  • This is an electric fan heater suitable for industrial applications and from a very well known high quality tool brand
  • One heat setting with thermostat control, plus fan only
  • No condensation, no gas, no fumes and no smell
  • Suitable and a perfect choice for garages and sheds
  • Comes with a power cable and 3-pin plug
  • Measures 24.3 x 24 x 31.3 cm
  • Weighs 3.72 kg
  • 2 Kilowatt heater

How Much Do Heavy Duty Heaters Cost to Run?

You will have the initial cost of buying the heavy duty heater. The more important cost, in my opinion, is the ongoing running costs. I will try and explain how to work those out. on average a unit of electricity in the UK costs on average about 14 pence a unit. Please note this will vary depending on who your electricity supplier is, and how much they charge.

For this example though we will assume a 14 pence average charge. Now a unit of electricity is measured in is kilowatt hours (kWh). That means using one kilowatt of energy for one hour. I have taken our selection of wattage ratings, and worked out how much each would cost per hour. Please note this is an average guide to the running costs.

Heater Size

Power Used

Hourly Running Cost


Up to 1,500 watts

21 pence


Up to 2,000 watts

28 pence


Up to 2,500 watts

35 pence


Up to 3,000 watts

42 pence

As you can see, these running costs can get expensive. Let's assume you had a heavy duty heater using 3,000 watts, and you used it for a couple of hours each day. That would be 84 pence a day, £6 a week or £25 per month. 

Most people in the UK should be on some type of deal from their electric supplier, so it should be cheaper than the standard 14 pence rate. If not, then that is something you should certainly look into, as it can save you a considerable amount of money per year.

The Buying Cost of Heavy Duty Heaters

The cost of purchasing a heavy duty heater is around £50-70 on average.  If you want something that is more robust and better suited for a garage, then you will be more likely to pay around £100. For the higher money you usually get a more powerful garage heater, and it will have more safety features.

How To Use a Garage Heater Properly

The best way to use these types of heaters is to never leave them running on full power. When you enter a cold garage, conservatory or shed then by all means turn these on and give the space a good 10 minute blast. Once that is done, the space will have been warmed up and then you should turn it down to a much lower setting.

There are a couple of reasons for that:

  1. It will save you money
  2. It avoids any risk of the heater over heating, or any risk of a fire

These are not designed to be on full blast for long periods of time. The electric plugs can heat up and the heater can also over heat. If you use the heater as I have suggested above, it will last for a very long time. I normally set a 10 minute alarm on my mobile phone as a reminder, otherwise I tend to forget.

Buying Tips for Garage Heavy Duty Heaters

There are many reasons why people want to buy one of these. They are great when the heating breaks down especially in the winter time if the water pipes happen to freeze.

They are also very good for drying out rooms that may have been flooded.

Their main purpose though is to heat a large space that does not have central heating, or any other form of heating. The normal little blow heaters, or the gas heater type are a good enough choice for small areas, but just useless at heating bigger areas.

Commercial businesses will usually have some type or gas or propane heaters to help warm the place up, or at the very least take the chill out of the air.  Those however are not really that practical as domestic garage heaters. For those to be effective what you are really after is some type of economical garage heater.

You can buy garage/workshop heaters in the UK at the usual places such as B&Q or Screwfix. You can also get them online at places like Amazon UK.  The ones shown on my top 10 list are one of cheapest ways to heat a garage.

Cheapest Ways to Heat a Garage

Most garages are single brick walls and any space built like that is always going to be cold and can also be slightly damp.

One way of helping with the heating is to try and insulate it, as that really does help a lot. A quick way of doing that is to insulate the roof. At the end of the day, just like your home most of the heat disappears through the roof.

Some insulation there and then covered over with plasterboard will make a difference.

You can of course section off a garage if not all of it is being used. It is always easier to heat a smaller space.

Oil Filled Radiator

Some people go for an oil filled radiator, or an electric radiator if you have power to the garage. You can keep those on a low setting and it does keep the chill out of the garage.

Under Floor Heating

I have a couple of friends who have used a combination of under floor heating and laminate flooring. They had removed some older laminate flooring from a living room, and then laid that in their garage, as it had a cold cement floor.

Before they did that though, they put down under floor heating coaxial cables, and then placed the floor on top of them. They did have electricity in their garage, but that solution worked great for them.