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SMH Surface-Mount Ceiling Heaters

  • Low profile ceiling heaters allowing free use of floor and wall space
  • UK manufactured  high quality heater providing years of trouble-free service
  • Optional controller for variable outputs and fan only settings
  • New model available in a smart black finish (SMH-30B)

For multi-heater installations we recommend SystemX

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 Built-in Thermostat List Price
SMH-30 3.0 230 No £410.00
SMH-30T 3.0 230 Yes £550.00
SMH-30B 3.0 230 No £410.00
SMH-45 4.5 230 No £450.00
SMH-45T 4.5 230 Yes £590.00
SMH-60 6.0 230 No £680.00
SMH heaters: ideal for an open plan office

SMH’s low profile design is only 152mm in height making them very unobtrusive

The rugged SMH is well suited to industrial applications

SMH heaters free up wall space and area ideal for shops with solid ceilings 


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 with ‘open window detection’ feature.

6kW heaters have a built-in relay meaning that the minimum switching capacity of a suitable thermostat is reduced to 10A.

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 RAL9016
Black (SMH-30B model)
Finish: Epoxy polyester powder coating
Construction: 0.9mm steel case
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)

Temperature control by factory fitted electronic thermostat with panel front adjustment

Default mode – built-in thermostat switches heat and fan.  This can be changed so thermostat switches heat only with fan running continuously.

Can be controlled by CS-7 wall mounted controller for on/off/high heat/low heat and fan only settings

The built-in thermostat has an ‘open window detection’ feature

Control (models without built-in thermostat)

Temperature control can be provided by RST2-IN or RST-TP 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

Installation Keyhole screw fixing to conventional ceiling or suspension from drop rods (4 x M6 threaded holes provided)
Recommended mounting heights 2.4m to 4m above floor level (see table below)
Guarantee 1 year

Performance Data

SMH Surface-Mount Ceiling Heaters
Model Volts kW Airflow (m³/h) dB*@ 2m Recommended Mounting Height (m)
SMH-30(T) 230 3.0 245 56 2.4 – 3.0
SMH-30B 230 3.0 245 56 2.4 – 3.0
SMH-45(T) 230 4.5 345 60 3.0 – 4.0
SMH-60 230 6.0 490 58 2.4 – 3.0

*Noise levels are factory tested not laboratory tested

Physical data

Model Width (mm) Depth (mm) Height (mm) Weight (kg)
SMH-30(T) 575 392 152 8.0
SMH-30B 575 392 152 8.0
SMH-45(T) 575 392 152 11
SMH-60 575 592 152 12.5

Spare Components

This is a list of the more frequently requested spare components.  Should you require a component that is not listed please contact BN Thermic.

Part Number Description
AS-SCH-30 Fan/motor/element assembly (3kW) – two used in 6kW heater
AS-SCH-45 Fan/motor/element assembly (4.5kW)
A warm customer at a trade counter in Scotland

SMH heaters can be easily surface mounted or suspended on
chains/drop rods. Available in white and black.


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

In simple terms the output of the SMH 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

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, select the minimum number of heaters needed to meet this requirement.

Model kW Voltage Recommended Mounting Height (m)
SMH-30(T) 3.0 230 2.4 to 3.0
SMH-30B 3.0 230 2.4 to 3.0
SHM-45(T) 4.5 230 3.0 to 4.0
SHM-60 6.0 230 2.4 to 3.0