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System X – Overdoor Heaters

System X - Overdoor Fan Assisted Heater
  • Control up to 12 overdoor heaters from a single point – ideal for shops
  • All connections by Cat5 cable for super quick and error free installation
  • Can be connected to any heater in the System X range – any combination – any sequence

Range & Prices

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


890T Model with built in thermostat

Left: XD30 and XD60 models. Above: XD90 model.

XD30, XD60 and XD90 models.

Model kW List Price
XD30 3.0 £590.00
XD60 6.0 £859.00
XD90 9.0 £1122.00

Control Components

Type Description Model

List Price

Controller With thermostat
On/off/high/low/fan only settings
Open window detection


Controller With tamper resistant thermostat
On/off/high/low/fan only settings
Open window detection


Controller Without thermostat
On/off/high/low/fan only settings


Controller With digital programmable thermostat
Optimum start feature


Controller For use with volt-free signal from BMS (for 230V signal a VI Interface is required) CX-BMS


Sensor Optional remote sensor for use with CX1, CX2 or CX6 CXS


Cable Cat5 terminated 5m DX05


Cable Cat5 terminated 10m DX10


Cable Cat5 terminated 20m DX20


Joiner Cat5 cable joiner JX1


Auxiliary Control Components




List Price

Programmable Thermostat

Use with CX-3 for 7-day programmable control

Optimum start option




7-day programmable timer for use with CX1 or CX2



How It Works

System X overdoor heaters provide a warm airstream across doorways and entrances.  They are particularly well-suited to shops.

A system will include a controller and up to 12 individual heaters.  The control daisy chain is connected using Cat5 cables ensuring the quickest possible installation time.  Power is introduced to each heater individually with the controller taking its power from the first heater in the chain.

A unique feature of System X is that any style of heater from the range can be incorporated into a control daisy chain.  For example, an overdoor heater could be added to a ceiling grid heater system.  Heaters can be connected in any combination and any sequence.

Four over door heaters controlled from a single controller

Four over door heaters controlled from a single controller

Technical Specification

Colour: White RAL9010 case with black grille
Finish: Epoxy polyester powder coating
Construction: 0.9mm steel case with white 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: Up to 12 heaters can be connected to a single controller in any combination or sequence.  Control connections are by Cat5 cable

Dual function wall or ceiling mounting brackets providing vertical or angled discharge (9kW heater – vertical discharge only)

  Alternatively, 2 x M8 threaded holes are provided for suspension from drop rods
  Recommended mounting heights 1.8m to 3m above floor level
Electrical Supply:

All models can operate with a 230V 1ph supply


XD-90 can also operate with a 400V 3ph & N supply


1 year

Performance Data

Model kW Volts Airflow
dB* Mounting Height (m)
XD30 3 230 245 56 1.8 to 3.0
XD60 6 230 490 58 1.8 to 3.0
XD90 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)
XD30 635 108 225 7
XD60 1105 108 225 11.5
XD90 1620 108 225 17
An XD-90 providing a warm welcome to a hotel in Oxford

An XD-90 providing a warm welcome to a hotel in Oxford

Technical Specifications – Controls


Maximum number of heaters controlled: 12
Type of heaters controlled: any heaters from the System X range in any sequence
Electrical Supply: taken from heater via Cat5 cable
Heater settings: on/off/high heat/low heat/fan only
Built-in adjustable thermostat range: 0 to 30˚C
Connection to first heater in group: Cat5 cable
Mounting: surface mount
Dimensions: 120mm x 80mm x 40mm

Special Feature: Open window detection (user selectable)


Model: CX2

As CX1 but with a tamper resistant built-in thermostat


Model: CX3

As CX1 but without built-in thermostat or open window detection


Model: CX6

As CX1 but with:

7-day programmable timer
Temporary override
Temporary lock
Optimum start for enhanced economy (user selectable)

Without open window detection


Model: CX-BMS

As CX1 but without manual or thermostat control
Requires a volt-free signal from a BMS to switch heater on and off

Can operate with a 230V signal via a VI Interface


Model: CXS

Remote mounted sensor for use with CX1, CX2 or CX6 controller
Overrides the controller’s built-in air sensor
Recommended maximum cable length between controller and sensor: 20m
Mounting: surface mount
Dimensions: 80mm x 80mm x 35mm

CXS Optional remote temperature sensor

Pre-terminated Cat5 Cables

DX05: 5m
DX10: 10m
DX20: 20m
JX1: Cat5 Joiner / Coupler – Click fit (Joins two Cat5 cables together should you require longer lengths)

Heater Selection

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

For best results, heaters should be selected to cover the entire door width.