Industrial Electric Heaters – E Range – Output Range – 3kW to 18kW


E Range Industrial Electric Heaters
Industrial Electric Heaters – Perfect for small and medium sized areas

Industrial Electric Heaters  -Ranging from 3kW single phase to 18kW 3-phase, Flexiheat has a complete range of electric fan heaters to suit both the domestic and industrial environment.

The Kroll industrial electric heater “E3 model” is 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.

Electric Space Heaters – Health & Saftey

As no vapours,exhaust gasses or odours are given off , as well as no naked flame , these industrial electric heaters can be used in many applications that direct fired diesel or gas heaters cant.

Industrial Electric Space Heaters

Our 18kW 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.

How to calculate what your heat requirement is for a given area ?

To establish what 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 (W) 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.

Industrial Electric Heaters -Running Costs

Using a portable electric portable 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.

To work out an accurate running cost for an electric 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 14p/kWh = 42p per hour

The calculation above is based on 0.14p per kWh – please check with your current electricity bill for the exact hourly rate you are currently paying.

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.  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 very confined space. Model E18 now also available as version “SH”, “S” for hose connection and version “H” for operation at high room temperatures for special duties such as thermal pest control.

These Industrial Electric Heaters are now available to purchase from our webshop

Download Electric Heaters Brochure

Download Technical Manual


Fully serviceable with full spare parts availability the our industrial range was conceived to offer the price benefits of a Chinese import coupled with German build quality, but UK built. All heaters in the 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 alternative to gas and diesel.

FHE3  Industrial Electric Heater – 3kW  

Industrial Electric Heaters


  • Approx Airflow Rate = 423m³/hr
  • Fan Type = Radial
  • Sensible Heat Capacity = 10,236 BTU (3kW equivalent)
  • Max Heat Capacity (kcal) =  2625
  • Supply = 110v or 230v 50hz
  • Plug Size = 32A (110v) 13A(230v)
  • Sound (3m) =  45dB(A)
  • Spigot  = 200mm
  • Mobility = Portable
  • Remote Thermostat Optional
  • Dimensions HxWxD (mm) = 360x300x330
  • Weight = 10kG
  • Overtemp protection  = Yes
  • Max Ducting = 2m

FHE12 Industrial Electric Heater – 9kW


  • Heat capacity 30,708 BTU  / 9kW
  • Airflow Rate = 1,200m³/hr – Pressure 85 PA – Fan Type = Radial
  • Supply – 400v / 50hz – Plug Size 16Amp
  • Sound level at 3 metres –  55dB(A)
  • Internal Thermostat Fitted as Standard
  • Optional Remote Thermostat available
  • Dimensions HxWxD (mm) 425 x 345 x 295
  • Weight – 15 kG
  • With Over temp protection as standard

FHE23 Industrial Electric Heater – 18kW

Industrial electrical heater


  • Heat capacity 61,416 BTU / 18kW
  • Airflow Rate = 1,850m³/hr – Pressure 90 PA – Fan Type = Radial
  • Supply – 400v / 50hz  – Plug Size 32Amp
  • Sound level at 3 metres –  60dB(A)
  • Internal  Thermostat Fitted As Standard
  • Optional Remote Thermostat available
  • Dimensions HxWxD (mm) 415 x 345 x 504
  • Weight – 20 kg
  • With Over temp protection as standard

FHE13 Industrial Electric Heater  – 9kW

Industrial Electric heaters


  • Heat capacity 30,708 BTU / 9kW
  • 16A 400v 3ph supply
  • 900m3/hr Airflow
  • Adjustable Thermostat
  • Can duct 10 Mtrs in total lenght

A powerful 16Amp heater designed to deliver 13.9 kW of sensible 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 alternative to gas and diesel heaters.

Should you require any further assistance with our Industrial Electric Heaters /  Industrial  Electric Heater , please click here to contact us via email or call us direct on 01202 822221