Industrial electric heaters, electric heater industrial or industrial electric blow heaters are air heating systems with high energy-efficiency and a thermostat for energy-saving control from Flexiheat UK.Flexiheat UK

Industrial Electric Heaters  – Output Range – 3kW to 80kW

Industrial electric heaters, electric heater industrial or industrial electric blow heaters are air heating systems with high energy-efficiency and a thermostat for energy-saving control from Flexiheat UK.
Industrial Electric Heaters from Flexiheat UK 

With our large range of industrial electric heaters with outputs from 3 kW in single phase to 80 kW in Three Phase, Flexiheat UK has a complete range of industrial electric fan heaters to suit both the industrial and commercial electric warm air heating requirements from small to large areas.

Applications for Industrial electric heaters

Industrial electric heaters are rarely used as the only heat source in the workplace. More typical is that the mainstream heating might lack capacity in the coldest weather, or may not quite reach certain areas of the building. Industrial fan heaters are perfect as a source of supplementary heating. In some applications, the lack of a centralised heating system or mains gas supply forces companies to use electric industrial fan heaters as their primary heat source. Whatever application they are used be it as supplementary heating, emergence heating or as the a primary heating system, these industrial heaters are high in their effectiveness, versatility, relative low-cost and ease of installation, with 100% energy efficiency.

These industrial electric fan heaters are a very safe form of warm air heating as neither naked flames ,nor potentially poisonous emissions are produced such as carbon monoxide ,making these industrial electric fan heaters particularly suitable for use in special applications where the use of traditional fuels such as oil or gas is not permitted. They can also be used in closed environments, as no oxygen is required for these industrial electric warm air heaters to work, and provide extra warmth. You can also use these electric industrial heaters in a fan only or ventilation mode, which is great for moving air around in the summer months.

Typical applications for our range of Industrial Electric Heaters are;-

● Suitable for most Industrial and Commercial electric warm air applications
● Dockyards and ship building
● Power stations
● Factories & Warehouses with small or large volumes
● Mining
● Construction sites
● Processing plants
● Events & Marquees
● Schools
● Military Installations
● Exhibition halls and sports halls
● Hospitals
● Temporary Buildings

Industrial electric fan heaters – How do they Function ?

The heating elements generate heat by the Joule effect and the axial fan produces an airflow that is warmed up via heat transfer as it flows around the heating elements. Clean, warm air is discharged from the front outlet. The heating function is controlled by the built-in safety/room thermostat to keep a constant temperature and to prevent overheating. Most of our industrial electric fan heaters can also be fitted with a remote room thermostat to as an optional extra.

The use of a thermostat provides an automatic room climate control and the adjustable thermal output allows adjustment of the heaters performance to different heating needs and to reduce energy costs.

  • Output Temperature and the Delta T of Industrial electric fan heaters

Delta T is the industrial electric heater manufacturers ” trade terminology” for temperature change across a heater. In the case of industrial electric heaters, it is the difference between the air temperature going in and that coming out via the conduction process. It varies from heater to heater and indeed in any one heater it will depend in the heat setting and fan setting, however where a fan heaters specification states a delta T (sometimes abbreviated to ΔT°) it means at the maximum heat and maximum air flow. It is typical of industrial electric fan heaters to have a ΔT° of between 40 and 55°C. Where higher temperature output is required care is need because fan heaters are designed to operate within a temperature envelope so that if a heater produces a high temperature beyond its design envelope (which can happen if the airflow is restricted) then the thermal overload will switch off the elements. If you need a heater to produce a higher temperature lift, or if the heater is part of a process re-circulation system, let us know and we can advise you on a solution.

  • Our industrial electric heaters are well made, durable and robust, everything you would expect from a commercial and industrial manufactured product, the are also –
  1.  Economical:
    The heat is dispensed efficiently and in a concentrated way to the ambient air by a powerful fan.
  2.  Convenient:
    These  industrial electric space heaters do not use up any oxygen and they do not give off any unpleasant odours, or dangerous gases so they can be operated in rooms which have bad or even no means of ventilation. Temperature can be adjusted and is controlled by a inbuilt adjustable thermostatic control thermostat. The unit can also be used to ventilate rooms as well if so required. They can be used instantly where electrical power is available
  3. Robust and safe:
    All appliances are VDE checked and thermally protected. The heating elements have a stainless jacket and the casing is manufactured from galvanised steel sheet, which is then stove-enamelled , resulting in durable and robust industrial electric fan heaters.

Industrial Electric Blow Heaters – Health & Safety Factors

As no vapours, exhaust gasses or odours are given off , as well as no naked flame- which is very important these days as many building insurance policies insist / have banned a naked flame heaters, due to fire risk, and often make in mandatory for insurance cover for a building that these type of  direct fired warm air heaters are not used. These industrial electric heaters can be used in many applications that direct fired diesel or gas heaters cannot.

Industrial Electric Space Heaters -How to calculate what your heat requirement is for a given area ?

To establish what output industrial electric heaters or heater you need, just do the following –

First calculate the volume of your building / area in metres cubed (m3)

Then multiply this by 33 Watts (W) per metres cubed , then dived by 1000 , and this will get you the result in Kilo Watts – (kW)

An example would be – 200 (m3) x 33 (Watts) divided by 1000 ( to get into kilo Watts ) = 6.6 kW Total Heat Requirement

This is a general “Rule of Thumb” calculation, and is based on a high insulation value ( U Value )

If you require any help in industrial electric heater sizing, please don’t hesitate to contact us, we’d be pleased to help, and run a heat loss calculation for you

Running Costs for Industrial Electric Heaters 

Using an Industrial Electric Heater remains one of the most cost effective solution for providing emergency or supplementary heat for a particular space in your home ,office, site cabin or warehouse with electric heating

To work out an accurate running cost for an industrial electric fan heater you can use the below calculation:

Calculating an accurate running cost can vary from room to room because of many factors for example,  number of doors and  windows, building condition, insulation levels  etc. However the following calculation can be used to provide a general idea:

Energy input (kW) x pence per kWh= running cost.

For example a 3kW fan heater run continuously (without stopping) for 1 hour would be:

3kW x 14 Pence/kWh = 42 Pence per hour

The calculation above is based on 14 Pence per kWh – please check with your current electricity bill for the exact hourly rate you are currently paying.

Premium Industrial Electric Heaters – Zinc Plated – Up to 20kW Output – Digital Control

We also supply a upgraded or premium industrial electric heater , called the “FHNXG” range. This range of unit heaters benefits from a zinc plated housing and a more capable control system. It has a digital control system that allows you to –

Delay start -Programmable On feature – This feature enables the user to postpone the starting time of the industrial electric heater by up to 99 hours.

Delay stop – Programmable Off feature – This feature enables the user to extend the operation of the industrial electric heaters by up to 99 hours.

Post ventilation – This feature (setting time between 1-9 minutes) enables the heater to cool down before eventually switching off. This saves and utilizes the energy to its maximum, as the residual heat is fully utilized, and blown into the area that is being heated.

Ventilation only mode – This unit can also be used in a ventilate only mode which is useful in the summer months to move hot or stagnant air.

Digital Temperature Control – These industrial electric heaters can automatically control the room temperature up to a maximum of 35 Degrees C. The heater will automatically come on, if the room temperature falls under the desired temperature you select ( up to and including 35 Degrees C)  , the electric fan heater automatically switches off when that temperature is achieved.

Industrial electric heaters control panel for industrial applications with adjustable thermostat and two heat settings.

The “FHNXG” industrial electric heaters, benefit from a handle that makes moving and transporting the heater easy. This handle also doubles as a security rail which prevents damage from being dropped or hit by another object, which can often happen on site , especially building sites. These industrial electric heaters are also stack-able, ensuring a small area is required if the units are put into storage whilst not in use, which is another handy feature of these electric heaters.

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A picture of an Industrial electric heater / industrial electrical heater/ industrial electric fan heaters from 6 kw to 20 kw output from Flexiheat UK

Technical Specifications of the “FHNXG”  Industrial Electric Heaters

Model 9kW heat output15kW heat output20kW heat output
Output  –    (two heat settings)                                 kW6  / 97.5  /  1510   / 20
Mains Voltage                                                                 V400400400
Max. Mains Current                                                     Amps132126
Fan Diameter                                                             mm315315315
Air Circulation rate                                                    m³/h1,7002,2003,000
Dimensions    ( L x W x H )                                         mm340 x 390 x 510530 x 390 x 510530 x 390 x 510
Weight                                                                           Kg’s7.5910
IP RatingIP44IP44IP44

We also do one industrial fan heater unit which is 9kW Output, that is made with a stainless steel casing , and a higher IP rating of IP54. This heater is particularity suited to use in dry, humid , or any other location where a fire hazard is of particular concern, as well as in heating farm buildings etc, where IP54 is a requirement. This 9 kW Industrial electric heater has an inbuilt room thermostat to control the temperature and automatic protection against overheating. The step less variable thermostat and accurately sized fan ensures an even temperature and good heat distribution. The heating elements and carrying handles are extra insulated and for increased safety a built-in thermostat which switches off in the event of overheating,  which needs to be reset manually in the event of it tripping- an added security feature .The maintenance free electric motors, stainless steel heating elements and ISO 9000 controlled production guarantee a reliable and long life for this Industrial electric heater. This heater is designated the “FHLB9KW” and the specification is as follows –

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The FHLB9KW Stainless Steel Industrial Electric Heater, IP54 Rated, 3 Phase 400 volts

Output in (kW): 1.8 kW / 5.4 kW / 9 kW

Adjustable thermostatic control

Mains voltage – (V): 3 Phase x 400 volts

Max mains current -(A): 16 Amps

Air circulation – (m²/t): 700 / 1000

Fan diameter – (mm): 300

Dimensions L X B X H – (mm): 670 x 450 x 600

Weight -(Kg’s): 18

IP Rating – IP54

Mobile & Ductable Industrial Electric Fan Heaters

There are two heaters within this industrial space heaters electric range , the first has a maximum output of 18kW , this industrial electric heater is designated the “FHEHT18” , or we have the “FHEHT30” model, which will do maximum heat output of 30kW of output. Both of these industrial electric heaters require a 3 phase electrical supply , and should only be used in door or protected from the elements. These Industrial electric fan heaters can operate in heating mode (either full or half power) and in ventilation mode (with heat elements turned off) and can utilize a flexible warm air duct , of up to 15 metres in length as well as a remote thermostat and controller if so required by site conditions. or can be used in just a free blowing configuration.

These Industrial Electric Fan Heaters features are –

  • Thermal protection to protect the unit from overheating
  • They are equipped with wheels and handles for easy transport
  • They have both a heating and ventilation mode
  • Adjustable thermostatic control
  • A well made and durable heater
  • Are suitable for stacking – saving the space required for storage and are perfectly suited to the construction equipment rental market
  • You can duct the these heaters up to 15 Metres
  • There is an option of a external controller and thermostat
  • Optional frame protection kit ( see picture below ) which protects these industrial electric heaters against damage to the device as well as easier transportation by car or lifting by crane
  • Accessories such as warm air diffuser’s, warm air duct “Y” connectors ( which allow 2 warm air hoses to be connected), electrical extension cables ( in 5,10,15 or 20 metre lengths)

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Technical data for the FHEHT18 Industrial Electric Fan Heater

Power Output : 9/18 kW – ( 30,708 or 61,416 Btu’s /Hour) two heat settings
Air flow : 1,700 m3/h
Power supply : 3 Phase 400/50-60​ V/Hz
Rated current : 26 Amps
Plug: 32 Amp/5 Pin
Protection rate: IP24
Dimensions (LxWxH) [ in mm]: 715 x 475 x 615
Weight : 30 KG’s

Technical data for the FHEHT30 Industrial Electric Fan Heater

Power Output : 15/30 kW – ( 51,180 or 102,360 Btu’s /Hour) two heat settings
Air flow : 3,500 m3/h
Power supply : 3 Phase 400/50-60​ V/Hz
Rated current : 43.5 Amps
Plug: 63 Amp/5 Pin
Protection rate: IP24
Dimensions (L x W x H) (in mm):  941 x 571  x 730
Weight : 45 KG’s

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Additional Accessories available for the “FHEHT” range of Industrial Fan Heaters include remote room stat, a remote heater controller and a heater protector frame

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Or for using these Industrial Electric Blow Heaters in conjunction with warm air hoses or ducts , with have the following accessories available – Warm Air Hose Splitter or Y piece and also Warm Air Diffusers

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Both of these industrial electric space heaters comply with the following standards: EN 60335-1, EN 60335-2-30, EN 62233, EN 55014-1, EN 55014-2 and meet the requirements of European directives 2006/95 / EC, 2004/108 / EC, 2011/65/EC.

Download Brochure for FHEHT Industrial Electric Fan Heaters



Fully serviceable with full spare parts availability our industrial electric heater range was conceived to offer the price benefits of a Chinese import coupled with German build quality, but UK built. This electric fan heater range come with same heavy duty build and feature adjustable thermostats, mains plugs & leads, over temperature protection and full warranty as standard. Built to withstand industrial use using the same high specification of materials and production methods this extensive range has something to suit every application and is an ideal safe, clean, fume free electric heating alternative to gas and diesel heaters.

FHE3  Industrial Electric Heater – 3kW  

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3kW Industrial Fan Heaters


  • Sensible Heat Capacity =  3kW / 10,236 BTU’s
  • Approx. Airflow Rate = 423m³/hr
  • Fan Type = Radial
  • Electrical Supply = 110 Volt or 230 Volt / 50Hz – Single Phase
  • Plug Size = 32 Amp – for the 110 Volt version or  13 Amps for the 240 Volt-  both Single Phase
  • Sound (at 3mtrs) =  45dB(A)
  • Spigot ( optional )  = 200mm
  • Mobility = Portable
  • Remote Thermostat – Optional
  • Dimensions HxWxD (in mm) = 360 x 300 x 330
  • Weight = 10kG
  • Over temperature protection  = Yes
  • Max Ducting = 2 metres with optional spigot accessory

This 3kW Industrial Fan Heater , is a robust and sturdy solution to heating small areas. These electric heaters have an internal room stat, that allows you to control the temperature in the room from 0 Degrees to 40 Degrees C, which also makes them a great solution as frost protection heaters. As they also available in 110 Volts, the are a great heater for building sites and building huts to provide heat to keep the workers happy , and/or to use the warm air to help cure building materials , such as plaster , concrete, paint etc and speed up the building progress.

FHE13 Industrial Electric Fan Heater  – 9kW

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FHE13- 9kW Industrial Electric Heated / Industrial Fan Heaters from Flexiheat UK


  • Heat capacity – 9kW / 30,708 BTU of heat output
  • Electric supply – 400 Volt / 50Hz  – Plug Size – 16 Amp
  • Air Flow – 900 M3/hr
  • Adjustable Thermostat
  • Can duct 10 Mtrs in total length

A powerful 16 Amp electric industrial heater designed to deliver 9kW of  heat. Built to withstand the rigours of regular site use with features including an adjustable thermostat and over temperature protection as standard while the optional single or double spigot outlets can provide warm air either along 10 Mtrs of ducting or to two separate area’s. A clean, odourless and fume free electric heating alternative to gas and diesel heaters.


FHVH18 – Electric Industrial Fan Heater

Is our new high-performance industrial electric warm air heater the “FHVH18” model. This electric fan heater has a heat output of 18 kW or 12 kW, and can also be used in a fan only mode – for moving air in the summer periods or to help reduce drying times when used in the flood restoration market or building construction sector. They unit comes complete with an innovative 360⁰ air diffuser, which not only is lightweight, but also is manufactured in a fire retardant material, which conforms to the latest EU and British standards.

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The “FHVH18” Industrial Electrical Heater from Flexiheat UK

This electric industrial heater has the following features –

1. A 50⁰C Temperature rise – so this unit will add 50 C to the entering air temperature
2. A large airflow of 2,300 M3/hour
3. An inflatable and lightweight air distributor – which gives 360⁰ of warm air heating – and is certified flame retardant.
4. Has a recessed control panel with lockable cover – with full high temperature protection
5. Is a three Phase, neutral and earth – 32 Amp electrically powered industrial electric fan heater – 28 Amps running current
6. Dimensions (including the warm air diffuser) H x W x D = 2,107 mm x 393 mm x 603 mm
7. Dimensions (without the warm air diffuser) H x W x D = 1,347 mm x 393 mm x 603 mm
8. This heaters weight is 70 Kg
9. These electric industrial fan heaters benefit from an air filter too.
10. Comes as standard with a remote and chassis mounted warm air thermostat
11. Is a fully portable heater, that has locking castors

Download the Flexiheat Brochure for “FHVH18” Electric Industrial Heater

FHE42 Industrial Electric Heater / Industrial Electric Blow Heater – 42kW or 21kW Output 

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42kW Industrial Electric Blow Heater from Flexiheat UK

  • 42 kW Nominal Output Heater – With two stage output – 21 kW or 42 kW
  • Electric Supply: 400 Volt / 50Hz  – 3 Phase supply – 63 Amp
  • Airflow Rate – 4,000 M3/hr
  • Maximum Ducting Length –  30 Mtrs
  • Spigot Diameter –  500 mm
  • Weight – 130 KG
  • Adjustable Thermostat
  • Fork pockets -making the unit easy to transport
  • Lockable castors – which make this commercial electric heater easy to move
  • Sound Level at  3 Mtrs –  73dB(A)
  • Dimensions HxWxD (in mm) – 1000 x 700 x 1100

The most powerful 63 Amp industrial electric fan heater available. Designed and built for industrial use the FHE42 features variable heat output, 24 Volt control circuit for safety, remote thermostat socket, spigot, over temperature protection and an auto run on as standard.

80Kw Mobile industrial warm air heater – FHE80 a great heater with high heat outputs for industrial use to deliver warm air with variable heat output

80kw electric warm air heater mobile 3 phase supply – the FHE80 from Flexiheat UK

80kW Industrial electric warm air mobile heaters – 3 Phase / 415 volt

This electric warm air heater generates 80 kW of heat and may be programmed to maintain a constant delta T, or a specific overall temperature. The FHE80 also has a strong rearward curved EC axial fan to provide for different airflows and even long-distance ducting.

The unit has 2 heat output settings – 80kW or 48 kW of variable heat output.

Download the FHE80 80kw industrial electric heater mobile manual Flexiheat UK

Kroll “E Range” Industrial Electric Space Heaters – perfect for small and medium sized areas – Outputs from 3kW to 18kw

Industrial Electric Heaters  -The “E” range of industrial fan heaters with outputs from 3 kW single phase to 18 kW 3 Phase are manufactured in German, and as you would expect from product manufactured in this country it is very well made , and uses only the best components within it manufacture. Flexiheat UK is the sole distributor of the Kroll electric heaters for the UK and Ireland markets , and are pleased to offer this range of industrial electric fan heaters to suit both the commercial and industrial electric warm air heating requirements from small to large areas.

The Kroll industrial electric heater “E3 model” is a 240 volt, single phase electric heater and with its lightweight design is an ideal solution to heating smaller rooms ,offices, site huts etc.

The E8, E12 and E18 industrial electric heater models extend to a 3 phase heater (415 Volt) and are ideal  for the larger industrial and construction environments such as; workshops, nurseries, shops, exhibition rooms, warehouse heating, building sites, heat load testing, frost protection, production and manufacturing facilities. The E8 – E18 Industrial fan heater range come with adjustable thermostatic control, and high and low heat settings and all units come with thermal cut-out overheat protection. Insulated handles allow for safe movement and handling whilst the heater is still warm.

These Portable Electric Heaters provide comfortable heat in spring and in autumn or if there is a sudden onset of cold weather. They can be used as frost control heater to, thanks to their in-built thermostats.


Industrial Electric Space Heaters

Our 18 kW electric industrial heater offers the ability to heat up separate area’s from one heater or / and deliver warm air via ducting through a warm air hose. Please see our separate product page on this model which is designated as version “SH”, “S” for hose connection and  “H” for operation at high room temperatures for special duties such as thermal pest control, this heater has it own dedicated web page here

Industrial Electric Heater Technical Data, Industrial Fan Heaters Technical Data

This range of industrial electric heaters, are well made, durable and robust, everything you would expect from a German manufactured product –

  • Economical:
    The heat is dispensed efficiently and in a concentrated way to the ambient air by a powerful fan.
  • Convenient:
    The heaters does not use up any oxygen. They do not give off any unpleasant odours so they can be operated in rooms which have bad or even no means of ventilation. The temperature can be adjusted and is controlled by a inbuilt thermostat. The unit can also be used to ventilate rooms as well.  They can be used  instantly where power is available
  • Robust and safe:
    All appliances are VDE checked and thermally protected. The heating elements have a stainless jacket and the casing is manufactured from galvanised steel sheet, which is then stove-enamelled , resulting in a durable and robust unit
  • Mobile:
    Thanks to their small dimensions, the electric fan heaters can be taken everywhere. You will find a place for them even in a very confined space.

Download Electric Heaters Brochure

Download Technical Manual

Industrial Electric Heaters / Industrial Fan Heaters for Sale UK & Ireland 

We think that we have the best range of Industrial Electric Space Heaters in the UK. Should you require any further assistance with our Industrial Electric Heaters /  Industrial Electric Fan Heaters /Industrial Electric Blow Heaters  , please click here to contact us via email or call us direct on 01202 822221