Best Industrial Heaters

For most UK buyers, the Bimson Power 5kW 3-Phase Electric Space Heater is the best industrial heater to buy. It offers the strongest mix of practical performance, value and usability in a category where the right choice depends heavily on where and how you plan to use it. Industrial heaters need to be chosen around the workspace rather than the product photo. Power supply, ventilation, dust, fuel storage, door opening, ceiling height and whether people are working nearby all affect what will feel safe and effective.

Industrial heaters need to be matched to power supply, ventilation, workspace size and fuel rules. A heater that is excellent in a ventilated workshop may be totally wrong for a closed room. The products below include 240V workshop heaters, 3-phase electric heat and diesel space heaters for suitable ventilated areas. The buying guide goes deeper on the trade-offs because a heater that is excellent for one workshop can be the wrong choice in another.

Our Top Picks

8 Best Industrial Heaters

1. Bimson Power 5kW 3-Phase Electric Space Heater

Bimson Power 5kW 3-Phase Electric Space Heater is the strongest starting point in this list because it gives most buyers a sensible mix of performance, practical features and everyday usability. The best clean electric option for workshops and commercial units with a suitable 3-phase supply.

Bimson Power 5kW 3-Phase Electric Space Heater should be matched to the site conditions first. A workshop with 3-phase power, high ceilings and regular door opening has very different needs from a small garage on a normal 240V supply.

Output is only useful if the building can use it safely. Electric heaters need the right circuit, while diesel and fuel-burning heaters need ventilation and fume management. In dusty or solvent-heavy spaces, placement and suitability become even more important.

Think about whether you need to heat the whole building or just a work zone. Spot heating around benches, bays or occupied areas can be more realistic than trying to turn a draughty workshop into a living room.

Features

• 5kW electric fan heater
• 3-phase supply required
• Portable industrial body
• Fume-free heat
• Two heat settings
• For garages and commercial units

2. Autojack 3kW Industrial Electric Fan Heater

Autojack 3kW Industrial Electric Fan Heater earns its place as a practical alternative, especially if its particular format suits your setup better than the top pick. A portable 240V workshop fan heater for garages, sheds and small workspaces needing simple electric heat.

Output is only useful if the building can use it safely. Electric heaters need the right circuit, while diesel and fuel-burning heaters need ventilation and fume management. In dusty or solvent-heavy spaces, placement and suitability become even more important.

Think about whether you need to heat the whole building or just a work zone. Spot heating around benches, bays or occupied areas can be more realistic than trying to turn a draughty workshop into a living room.

Features

• 3kW electric fan heater
• 240V supply
• Three heat settings
• Portable 4kg body
• Workshop and garage design

3. Benross 3000W Industrial Fan Heater

Benross 3000W Industrial Fan Heater earns its place as a practical alternative, especially if its particular format suits your setup better than the top pick. A yellow portable industrial fan heater with thermostat, tilting body and IPX4 protection for tougher workspace use.

Think about whether you need to heat the whole building or just a work zone. Spot heating around benches, bays or occupied areas can be more realistic than trying to turn a draughty workshop into a living room.

Noise and air movement are practical issues too. Big fan heaters can move dust and feel harsh at close range, so the best option is often the one that fits the workflow, not just the one with the biggest BTU number.

Benross 3000W Industrial Fan Heater should be matched to the site conditions first. A workshop with 3-phase power, high ceilings and regular door opening has very different needs from a small garage on a normal 240V supply.

Features

• 3000W fan heater
• Adjustable thermostat
• Cool air setting
• Tilting design
• Carry handle
• IPX4 rating

4. JCB 70,000 BTU 20kW Diesel Space Heater

JCB 70,000 BTU 20kW Diesel Space Heater earns its place as a practical alternative, especially if its particular format suits your setup better than the top pick. A powerful diesel space heater for ventilated workshops, garages and site use where high output is needed.

Noise and air movement are practical issues too. Big fan heaters can move dust and feel harsh at close range, so the best option is often the one that fits the workflow, not just the one with the biggest BTU number.

JCB 70,000 BTU 20kW Diesel Space Heater should be matched to the site conditions first. A workshop with 3-phase power, high ceilings and regular door opening has very different needs from a small garage on a normal 240V supply.

Features

• 20kW diesel space heater
• 70,000 BTU output
• Diesel or kerosene fuel
• Adjustable thermostat
• Portable industrial design
• Approximate 496m3 coverage claim

5. Bimson Power 20kW Diesel Space Heater

Bimson Power 20kW Diesel Space Heater earns its place as a practical alternative, especially if its particular format suits your setup better than the top pick. A heavy-duty diesel or kerosene heater for workshops, sheds and large ventilated spaces needing rapid warm-up.

Bimson Power 20kW Diesel Space Heater should be matched to the site conditions first. A workshop with 3-phase power, high ceilings and regular door opening has very different needs from a small garage on a normal 240V supply.

Output is only useful if the building can use it safely. Electric heaters need the right circuit, while diesel and fuel-burning heaters need ventilation and fume management. In dusty or solvent-heavy spaces, placement and suitability become even more important.

Features

• 20kW diesel space heater
• 70,000 BTU class output
• Kerosene or diesel fuel
• Adjustable thermostat
• Portable body
• Three-year warranty claim

6. Draper 2kW PTC Portable Electric Space Heater

Draper is a name most workshop owners already trust for hand tools, and this 2kW PTC heater carries the same no-nonsense approach. It has two heat settings plus a fan-only mode, an adjustable thermostat and a tubular stand that tilts to aim the heat at the bench rather than the ceiling.

The PTC element heats up fast and regulates its own temperature, which makes it a safer choice than an exposed element around sawdust and shavings. It is rated for indoor and outdoor use, so it copes with the damp air of a garage or a shed better than a typical bedroom fan heater.

At £38.99 with 548 ratings at 4.4 stars, it is excellent value as a plug-in workshop heater. Do not expect it to heat a big space: 2kW is enough for a single bay or a one-person workshop, and it will struggle in a draughty double garage.

Features

• 2kW PTC element
• Two heat settings plus fan-only mode
• Adjustable thermostat
• Tilting tubular stand
• Rated for indoor and outdoor use

7. Dimplex 3kW Electric Fan Heater

A well-known name in UK heating and a rare example of a fan heater that does 3kW from a standard plug. It offers 1.5kW and 3kW heat settings, a cool-blow option, frost protection and a manual thermostat, and it carries the BEAB safety approval.

Dimplex recommends it for rooms up to 25 square metres, which fits a single garage or a workshop. It is compact, with a carry handle and a 1.5 metre cable, so you can move it between jobs, and it is simple enough that there is nothing to go wrong.

It is a domestic-style heater rather than a rugged industrial unit, so it suits a tidy workshop or garage more than a dusty building site. With 732 ratings at 4.3 stars and a price of £49.58, it is the sensible mid-range choice if you want a trusted brand.

Features

• 1.5kW and 3kW heat settings
• Frost protection and cool blow
• Manual thermostat
• BEAB approved
• Compact with carry handle, 1.5m cable

8. De Longhi HBC3052T Fan Heater (800/1400/2200W)

The premium pick for a clean, enclosed workshop or a garage that doubles as a home office. It has three power settings (800W, 1400W and 2200W), which gives more control than the two-step models above, and De Longhi is known for good build quality and quiet running.

At £120.57 it costs more than twice as much as the Dimplex and four times as much as the Draper, and it heats less than either 3kW unit at full power. You are paying for refinement and a longer track record, not for raw output. With 914 ratings at 4.4 stars, buyers rate it highly.

It is a good fit if the heater will run for long periods in a workspace where noise matters. For a cold, large or messy workshop, spend the money on a more powerful unit instead.

Features

• 800W, 1400W and 2200W settings
• Compact fan heater design
• Established brand

Industrial Heater Buying Guide

Key Takeaways

• Work out the volume of the space in cubic metres and add a margin for poor insulation or high ceilings. Undersizing is the most common mistake.
• Plug-in electric heaters are limited to about 3kW by a standard 13A socket. 5kW and above needs a dedicated circuit fitted by a qualified electrician.
• Diesel and paraffin heaters give the most heat per pound but need ventilation, and direct-fired models put fumes into the room.
• Infrared heaters warm people and objects, so they suit open or draughty spaces where you only need to heat one work area.
• Check the IP rating and look for overheat protection and a tilt switch before you buy.

Fuel Type: Electric vs Propane vs Diesel

The right fuel depends on the size of the space, how often you heat it, and what supply infrastructure is available. For occasional or weekend workshop use in a small garage, electric is the simplest option. For large or frequently heated spaces, the economics of propane or diesel become compelling.

Electric industrial heaters are clean, instant, and require no fuel storage or ventilation. They range from 3kW fan heaters on a standard 13A socket to 30kW+ three-phase cabinet heaters. There are no fumes, no CO risk, and no fuel logistics. The running cost is the main disadvantage in large spaces.

Propane torpedo heaters produce 15kW to 100kW+ of heat output and can warm a warehouse in minutes. Fuel is stored in portable cylinders, which is practical where gas supply isn’t available. The combustion produces CO and moisture, requiring air supply and ventilation. Running costs are substantially lower than electric for large spaces used regularly.

Diesel heaters (direct-fired or indirect/clean-air) use on-road or heating oil and are the standard choice for very large areas, construction sites, and temporary structures. Indirect diesel heaters vent combustion gases externally and deliver clean, dry warm air, suitable for warehouses with stock that needs to remain dry and odour-free.

Direct vs Indirect Heating: A Critical Distinction

Direct-fired heaters burn fuel (diesel, kerosene, propane, or gas) and discharge the hot combustion gases directly into the space being heated. This is straightforward and highly efficient in terms of thermal output, but it means combustion products including nitrogen dioxide, carbon monoxide, and water vapour all enter the workspace. Short-term use in well-ventilated spaces is acceptable; continuous use in occupied workshops is not. Direct-fired heaters are the correct choice for unoccupied spaces (drying floors, frost protection, space warming before workers arrive) and outdoor or heavily ventilated structures.

Indirect-fired heaters use a heat exchanger to separate the combustion process from the airstream that enters the room. Combustion gases are vented externally via a flue or exhaust duct. The air output is clean, warm, and suitable for continuous occupancy. All oil-fired cabinet heaters, most commercial gas unit heaters, and ducted air heating systems are indirect. For any workshop or warehouse where people work throughout the day, indirect heating is the required standard.

Infrared Heating for Industrial Spaces

Infrared heaters emit radiant heat that warms objects and people directly, bypassing the need to raise the air temperature of the entire space. In a poorly insulated warehouse with a high ceiling, this is a significant advantage: convected warm air rises immediately to the roof and is lost, whereas infrared radiation travels directly from the panel to the work surface and the people below it.

Infrared is particularly effective for:

• Loading bays and open-fronted buildings: Doors open repeatedly; heated air escapes instantly. Infrared heats the workers regardless of air movement
• High-ceiling workshops: A 6-metre ceiling space takes enormous energy to heat with convected air. Infrared heating positioned above the work area delivers comfort at the occupied zone without heating the roof void
• Spot heating: A specific workstation, machine area, or security post can be heated by a single overhead unit without heating the entire building

Electric infrared panels are clean, silent, and instant. Gas-fired infrared radiant tubes provide higher output for larger spaces but require gas supply installation. Both are well-suited to permanent overhead mounting in industrial environments.

Sizing: How Much Heat Do You Actually Need?

The standard domestic rule of 100W per m² is almost meaningless for industrial buildings. Heat requirement depends on the building’s thermal characteristics: insulation, glazing, air infiltration, ceiling height, and the temperature difference between inside and outside targets. A modern insulated warehouse might need 15 to 30W/m³ of volume; an uninsulated steel agricultural building could need 50 to 80W/m³.

As a starting point for common UK industrial scenarios:

• Insulated workshop or garage (volume up to 100m³): 3 to 6kW electric or LPG to maintain 15 to 18°C in UK winter conditions
• Uninsulated garage or detached workshop (100 to 200m³): 6 to 15kW. Insulation is a better investment than a larger heater; adding 100mm of roof insulation typically cuts heat loss by 30 to 50%
• Industrial unit or commercial workshop (200 to 1,000m³): 15 to 60kW. Gas unit heaters or overhead infrared radiant tubes are the standard solution at this scale
• Large warehouse or factory (1,000m³+): Full heat loss calculation by a heating engineer is required. Destratification fans to recirculate warm air from ceiling level are often as cost-effective as adding more heating output

Power Supply: Single-Phase vs Three-Phase

Most UK premises have single-phase 230V supply. On a standard 13A socket, maximum output is approximately 3kW. On a 16A or 32A circuit (blue commando socket), 3.6 to 7.2kW. For workshop outputs above 7kW from electric, three-phase 400V supply is required, which gives access to units from 9kW to 50kW and above.

If your premises doesn’t have three-phase supply, the alternatives are multiple single-phase units (practical up to about 12kW total) or switching to gas or oil for high-output requirements. Three-phase supply installation from the Distribution Network Operator is a significant project and cost, but worthwhile if you’re installing permanent industrial heating.

For temporary or portable requirements, propane or diesel heaters on standard 13A for ignition controls bypass the electrical supply constraint entirely and can deliver 15 to 100kW of thermal output from a cylinder or tank.

IP Ratings for Industrial Environments

Industrial environments expose heaters to conditions that domestic ratings don’t anticipate. Metal grinding produces conductive dust; pressure washing after a job covers floors in water; oil mist from machinery settles on surfaces. IP ratings define protection against both solid particles and liquids:

• IP20: Protected against fingers, no liquid protection. Domestic standard. Not suitable for industrial use
• IP44: Protected against solid objects over 1mm; splash-proof from all directions. Minimum for most workshop environments
• IP54: Dust-resistant; splash-proof. Suitable for general workshop use including grinding and moderate water exposure
• IP65: Dust-tight; jet-proof. Suitable for environments with pressure washing or heavy water exposure

Fan heaters for workshop use should be IP44 minimum. Units used in spray booths, wash-down areas, or near outdoor pressure washing should be IP65. Infrared heating panels are often IP65 as standard due to their sealed construction.

Things to Keep in Mind Before Buying

Insulation comes before heater size. An uninsulated steel building will lose heat faster than any portable heater can replace it in a British winter. Even basic measures like a thermal roller door, roof insulation boards, and draught sealing around door frames will reduce the required heater output dramatically and pay back in lower fuel costs within a season.

Consider the fuel source economics for your site. Mains gas is the cheapest fuel per kWh for heating in the UK, typically 6 to 9p/kWh. LPG (propane or butane) costs 8 to 12p/kWh from cylinders. Electricity costs 25 to 30p/kWh for standard tariff, making electric resistance heating substantially more expensive per unit of heat than gas at scale. For a large workshop running 8 hours a day through winter, the fuel cost difference between gas and electric is significant over a heating season.

Temporary hire is worth considering for one-off needs. Propane cannon heaters, large electric fan heaters, and diesel cabinet heaters are all available from tool hire companies. For a building refurbishment or a temporary space requirement, hire avoids capital expenditure and the question of what to do with the unit afterwards.

Running Costs and Energy Management

Industrial heaters are high-wattage devices. Running costs matter significantly at commercial scale. A 3kW electric workshop heater at 28p/kWh costs 84p per hour. A 6kW model costs £1.68 per hour. At 8 hours a day, 5 days a week over a 26-week heating season, that is £873 for a 3kW model and £1,747 for a 6kW model in electricity alone. Propane and diesel heaters can be substantially cheaper per kWh of heat output at current UK fuel prices, which is why they dominate large uninsulated spaces.

Thermostat control is even more important at industrial scale than in domestic settings. A commercial workshop thermostat set to 14°C (adequate for working in, comfortable with appropriate clothing) rather than 18°C can reduce run-time by 30–40% over a heating season. For large spaces, zoning with multiple smaller heaters on separate thermostats is more efficient than a single oversized unit running continuously.

Propane prices vary by supplier and contract. Diesel heaters tied to a bulk fuel tank offer the best cost-per-kWh for continuous high-output commercial heating, with fuel costs roughly 65–70% below grid electricity at current rates.

Pre-Buy Checklist

• What is the volume of the space you are heating? (Length × width × height in metres = m³. Target 30–50W per m³ for a poorly insulated industrial building, 20–30W per m³ for insulated)
• Is a 13A socket sufficient (up to 3kW), or do you need 16A/32A single-phase or three-phase supply?
• Is the space adequately ventilated for combustion heaters (propane/diesel)? Do you have CO detectors installed?
• What IP rating does the environment require? IP44 for dust/splashes; IP54 or higher for high-dust or wet industrial environments.
• Do you need a thermostat and programmable timer, or will you control it manually?
• Is portability important, or will this be a semi-permanent wall or ceiling installation?
• What is the warranty and are replacement parts (fuel nozzles, heating elements) available for the brand you are buying?

Types of Industrial Heater

Electric fan heaters (industrial grade) are wall-mounted or ceiling-mounted units with IP44 or IP54 ratings and outputs from 3kW to 15kW per unit. Low installation cost where electrical supply is adequate. Higher running costs than gas at scale. Best for smaller workshops, offices within industrial units, and spaces used intermittently.

Gas unit heaters (overhead warm air, indirect) are the standard solution for most UK commercial workshops and warehouses. Piped natural gas or LPG supply runs to ceiling-mounted fan units that heat exchanger-clean air across the space. Outputs from 15 to 100kW per unit. Low running costs on mains gas. Requires gas supply installation and Gas Safe registered installation.

Oil-fired indirect cabinet heaters are portable units that burn kerosene or diesel through an indirect heat exchanger and vent combustion gases externally via a duct through an external wall or door. Fully portable, high output (30 to 100kW), no gas supply required. Popular on construction sites and for temporary industrial use. The ID65 and similar cabinet heaters are a UK industry standard for this application.

Propane and diesel direct-fired heaters (cannon heaters, torpedo heaters) deliver high output rapidly without a flue, making them effective for warming unoccupied spaces quickly. Not suitable for occupied workspaces due to combustion products. Use for frost protection, drying out after flooding, or initial heating before workers arrive.

Infrared radiant heaters (electric panel or gas tube) are mounted overhead and heat people and surfaces without warming the air volume. The correct choice for high-ceiling buildings, open-fronted structures, and spot-heating specific workstations. Electric panels need no installation beyond power connection; gas tubes require piped gas and flue.

Electrical Supply and Installation

A standard UK plug and socket tops out at 13A, which is roughly 3kW at 230V. Anything above that, such as the 5kW three-phase unit on this list, is wired to a dedicated circuit with the right cable and breaker. Have a qualified electrician check your consumer unit has spare capacity and fit RCD protection. For three-phase heaters, confirm that you actually have a three-phase supply before you order, since most homes do not. Never run a high-output heater through a long, thin extension lead.

Ventilation and Fire Safety for Fuel-Burning Heaters

Diesel, kerosene and paraffin heaters burn fuel, which uses oxygen and produces fumes. Indirect-fired heaters vent exhaust through a flue and are the safe choice for enclosed spaces. Direct-fired heaters release combustion products into the room, so they need good ventilation and are better for open or well-ventilated buildings. Keep a clear space of at least a metre around any heater, store fuel outside the building and use a carbon monoxide alarm. If you work with sawdust, solvents, paint or other flammable material, do not use an open-flame heater.

Thermostats, Timers and Controls

A thermostat is worth more than extra wattage. It cycles the heater on and off to hold a temperature, which cuts running costs and stops the space getting stuffy. A timer helps if you want the workshop warm before you start. On bigger units, a remote thermostat placed at working height gives more accurate control than one built into the heater.

Noise Levels

Fan heaters are noticeably louder than radiant heaters. For a workshop with machinery running, the noise rarely matters. If you will be on calls or working in a quiet space, look for a model with a low fan speed, or consider an infrared or oil-filled heater instead.

Which Heater for Which Space

Single garage or shed: a 2kW to 3kW plug-in fan heater, or a small infrared panel.

Double garage or workshop: a hard-wired 5kW electric heater or a small indirect diesel heater.

Barn, unit or warehouse: a larger diesel or three-phase unit, or several smaller heaters spread across the space.

Open or draughty areas: infrared, to heat people rather than air.

Maintenance

Clean fan heater grilles and intakes regularly, since dust and sawdust reduce airflow and can overheat the element. Diesel heaters need their filters, burner and fuel lines checked each season, and should be serviced by someone who knows the model. Run any heater briefly in a ventilated space after storage, since a burning smell on first use is usually just dust.

Common Mistakes

Buying by wattage alone. An uninsulated steel building loses heat far faster than a brick garage.

Running a high-output heater from an extension lead. It can overheat the cable.

Using a direct-fired heater in a closed space. It fills the room with fumes and moisture.

Ignoring the IP rating. A heater in a damp or dusty workshop needs better protection.

When Not to Buy an Industrial Heater

If the space is small, well insulated and used occasionally, a domestic fan heater or oil-filled radiator is cheaper to buy and safer. If you cannot ventilate the space and need a fuel-burning heater, look at an electric or indirect model instead. And if the building leaks heat badly, fix the draughts first.

Case Study: Choosing Heat for a Real UK Space

Background

A homeowner needed extra heat for a cold, awkward space that was not being served well by the main heating system. The first instinct was to buy the most powerful portable heater available.

Project Overview

Instead of choosing on output alone, they compared the space size, ventilation, power supply, clearance around furniture and how long the heater would run each day.

Implementation

The final choice was a heater matched to the actual use case rather than the biggest model on the page. The setup also included safer cable routing, better placement and a clear rule that the heater would not be used outside the manufacturer instructions.

Results

The space became more comfortable without overloading the power supply or creating avoidable safety risks. The biggest improvement came from choosing the right heater type, not simply more heat.

Expert Insights From Our Heating Engineers About Industrial Heaters

“The right heater is the one that suits the space, the power supply and the user. A powerful heater in the wrong place can be inefficient, uncomfortable or unsafe.”

“One of our senior heating engineers with over 15 years of experience recommends checking the practical details first: ventilation, clearance, cable route, fuel storage, IP rating and whether the heater is designed for that exact environment.”

“Do not treat safety features as permission to ignore the manual. Tip-over switches, overheat protection and oxygen sensors are backups, not a substitute for proper use.”

Frequently Asked Questions

Summing Up

The Bimson Power 5kW 3-Phase Electric Space Heater is the best industrial heater for most people because it gives the most sensible balance of performance, value and everyday usability. It is the product we would start with before comparing the more specialist options, especially if you want a dependable answer rather than simply chasing the highest output.

The other options are still worth considering if your situation is more specific. Think about where the heater will be used, how it will be powered, whether ventilation is needed, and how easy it will be to use safely every time. The right heater should make the space more comfortable without creating extra problems in the process.

Updated October 2026