Skip to content

800 Series Overdoor Fan Assisted Heater

800 Series Overdoor Fan Assisted Heater
  • Adaptable high level fan heater for use as overdoor heater or general commercial space heater
  • Smart modern appearance and manufactured in the UK to the highest possible quality
  • Optional controller for variable output and fan only settings
  • For multi heater systems we recommend SystemX
  • New – All models available in a smart black finish 

Range & Prices

The prices shown are list prices and perfectly safe to use for budget purposes. Contact your electrical wholesaler for final prices.


Model kW Volts Finish Built-in Thermostat List Price
830 3 230 White No £395.00
830B 3 230 Black No £395.00
830T 3 230 White Yes £520.00
830TB 3 230 Black Yes £520.00
860 6 230 White No £638.00
860B 6 230 Black No £638.00
860T 6 230 White Yes £775.00
860TB 6 230 Black Yes £775.00
890 9 400/230 White No £1015.00
890B 9 400/230 Black No £1015.00
890T 9 400/230 White Yes £1135.00
890TB 9 400/230 Black Yes £1135.00


Each heater can be controlled by one wall-mounted controller and/or one thermostat.

Do not use room thermostat with ‘T’ suffix models as these heaters already have a built-in thermostat.

6kW and 9kW heaters have a built-in relay meaning that the minimum switching capacity of a suitable thermostat is reduced to 6kW (10A) and 9kW (3A)

890T Model with built in thermostat
3kW heater providing a warm welcome to customers
Model Description List Price
CS 7 01 CS-7 Switch (on/off/high heat/low heat/fan only) £98.00
RD16 web RD16 Electronic programmable thermostat 16A (recessed) £65.00
programmable thermostat RT16 Electronic programmable thermostat 16A £144.00
thermostat RT26 Electronic programmable thermostat 26A £177.00
W16CW web 1 WD16 Wi-Fi electronic thermostat 16A (recessed – free app) £130.00
WT16 digi front web 1 WT16 Wi-Fi electronic thermostat 16A (free app) £222.00
WT26 digi front web WT26 Wi-Fi electronic thermostat 26A (free app) £269.00
RST3 IN Thermostat RST3-IN Mechanical thermostat 16A £60.00

A contactor can be used to enable a thermostat or timer to switch a load larger than its switching capacity.

Technical Specification

Colour: White RAL9010 case with black grille or Black case and grille
Finish: Epoxy polyester powder coating
Construction: 0.9mm steel case with white or black plastic end caps

Dual function steel brackets providing vertical air discharge or angled air discharge (9kW models – vertical discharge only)

Alternatively 2 x M8 threaded holes are provided for suspension from drop rods

Fan Assembly:

Tangential fan with low noise aluminium fan blades

Shaded pole high performance motor

Factory lubricated bearings (servicing not required)

Heating Element: High quality nickel-chrome resistance wire supported by ceramic plates and fitted with an automatically resetting over-temperature device
Control (models with built-in thermostat) On/off switch located on front panel
  Temperature control by factory fitted electronic thermostat with panel front adjustment
  Thermostat can switch heat and fan or heat only with fan running continuously.  A switch is provided to select preferred mode.
  Can be controlled by CS-7 wall mounted controller for on/off/high heat/low heat and fan only settings
Control (models without thermostat) Temperature control can be provided by a room thermostat
  Can be controlled by CS-7 wall mounted controller for on/off/high heat/low heat and fan only settings.  CS-7 can be used in conjunction with a room thermostat
Electrical Connections 

2 rear mounted terminal enclosures provided (one for electrical supply and one for connection to remote-mounted control devices).

Links can be removed to reduce heater output (3kW to 2kW, 6kW to 4kW and 9kW to 6kW)

Guarantee:   1 year


Performance Data

Model kW Volts Airflow
dB* Mounting Height (m)
830(T) 3 230 245 56 1.8 to 3.0
860(T) 6 230 490 58 1.8 to 3.0
890(T) 9 400/230 735 58 1.8 to 3.0

* Noise levels are factory tested, not laboratory tested.

Physical data

Model Width Depth Height Weight (kg)
830(T) 635 108 225 7
860(T) 1105 108 225 11.5
890(T) 1620 108 225 17
A 3kW heater keeping people warm in a clothing store

BN Thermic over door heaters are hand assembled in the UK and available from all UK electrical wholesalers 


If you would like the experts at BN Thermic to select suitable heating for your application, please click here to access our enquiry form.  Simply provide as much information as you have available and we will respond with a detailed proposal.

Enquiry Form

The 800 series can be used for two distinctly different applications: as an overdoor heater or as a general space heater.

Overdoor Heaters

Select a heater to suit the door width.

Generally overdoor heaters are selected without a built-in thermostat although this feature can be useful to prevent an excessively high air temperature when the heater is installed in a confined space such as the area between two sets of doors.

Space Heating

In simple terms the output of the 800 series heater or heaters must be greater than the heat losses from the building during periods of cold weather.  A small amount of heat is lost through the walls, ceilings and floors with more significant losses through windows and doors.

To estimate the heat loss from your building you may like to use our heat calculation tool

Heat Calculator
9kW over door heaters are often used in hotel foyer and office reception areas 

9kW over door heaters are often used in hotel foyer and office reception areas 


The estimated heat loss figure is the absolute minimum kW output that you should consider installing.  We would suggest adding approximately 50% to this figure to allow for an acceptable warm up time in cold conditions as well as making allowances for exceptional weather conditions and possible errors in the original data used in the estimate.

Having established the minimum kW output required, select the minimum number of heaters needed to meet the kW requirement.