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System X – Recessed Overdoor Heaters

System X - Recessed Overdoor Heater
  • Control up to 12 recessed 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.


Model kW List Price
XR-20 2 £480.00
XR-30  3 £546.00
XR-60  6 £925.00

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 recessed 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.

System X - Recessed Overdoor Heaters

Four recessed overdoor heaters controlled from a single controller

Technical Specification

Colour: Exposed surfaces white RAL9016
Other surfaces zinc plated steel
Finish: Epoxy polyester powder coating
Construction: 0.9mm steel case
Aluminium egg-crate grille (white)
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
Installation: Designed be recessed into a ceiling with fixing through the front face.
Recommended mounting heights 1.8m to 3m above floor level
Guarantee: 1 year

Performance Data

Model kW Volts Airflow (m³/h) dB* @ 2m Mounting Height (m)
XR-20 2 230 132 50 1.8 to 3.0
XR-30 3 230 245 56 1.8 to 3.0
XR-60 6 230 490 58 1.8 to 3.0

* Noise levels are factory tested, not laboratory tested.

Physical data

Model Grille Dimensions (mm)  Aperture Size (mm) Insert Depth (mm) Weight (kg)
  Width Height Width Height    
XR-20 363 230 315 150 160 3.3
XR-30 597 230 560 150 160 4.2
XR-60 1198 230 1148 150 160 11
An XR-60 creating a warm entrance to a high street clothing store.

An XR-60 creating a warm entrance to a high street clothing store.  

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 a 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

Typically, selection is as simple as choosing the correct length of heater to suit the door widths.  The XR-30 (3kW) is designed for installation over a single door whilst the XR-60 (6kW) is designed for installation over a double door. The XR-20 (2kW) is used where space is limited.