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ESP Radiant Cassettes

ESP Radiant Cassettes
  • ESP radiant cassettes provides an extremely economic method of heating buildings with high ceilings
  • Typical applications include sports halls, community halls and squash courts
  • ESP radiant cassettes provide economic heating without  the draughts and noise associated with fan heaters or the light output associated with shortwave radiant heaters
  • ESP radiant cassettes have a smart, sophisticated appearance and yet are extremely robust
  • Control multiple cassettes using
    PC Control Box

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 Recommended Mounting Height (m) List Price
Min Max
ESP2-09 0.9 230/1 3.0 4.0 £454.00
ESP2-12 1.2 230/1 3.0 4.0 £470.00
ESP2-18  1.8 230/1 3.5 6.0 £648.00
ESP2-24 2.4 230/1 3.5 6.0 £680.00
ESP2-30  3.0 230/1 or 400/3 3.5 8.0 £850.00
ESP2-36 3.6 230/1 or 400/3 3.5 8.0 £893.00
Ceiling mounted radiant cassettes allowing flexible use of space in a village hall

The ESP range providing an economic means of heating large areas

Optional Wall Brackets

Model Description List Price
ESP2-B Pair of angle adjustable brackets suitable for all ESP2 models £56.00


Typically, primary comfort heat control is provided by a wall-mounted programmable thermostat. Depending on the quantity and type of cassettes installed and the voltage supply, the thermostat can switch a group of heaters directly or via a suitably rated contactor. For larger installations see our PC radiant heater control box. (The control box is designed to make multi heater installs quicker and easier with all heaters controlled from a single point) 

Type Description Model List Price
Thermostat Electronic programmable thermostat with optimum start function 6A PROSTAT2 £121.00
Thermostat Electronic programmable thermostat with optimum start and open window detection functions (can be used with remote mounted sensor) 16A RT16 £144.00
Thermostat As RT16 except 26A RT26 £177.00
Thermostat WiFi  programmable thermostat  (can be used with remote mounted sensor) 16A – Download free app WT16 £222.00
Thermostat As WT16 except 26A WT26 £269.00
Remote Sensor Optional remote-mounted ‘black bulb’ temperature sensor for use with RT16 and RT26 programmable thermostat BBS £73.00
Contactor 32A 3-pole CON-32 £60.00
Contactor 50A 3-pole CON-50 £78.00
Contactor 80A 3-pole CON-80 £176.00
Contactor Enclosure for CON-32 and CON-50 ENCL-D £32.00

The engineers at BN Thermic are always available to design a bespoke control scheme.

ESP2 cassettes suspended from the ceiling in a garden centre

ESP2 cassettes can add to the aesthetic of modern commercial premises 

Technical Specification

Colour: White RAL9010
Finish:  Epoxy polyester powder coating
Construction: Steel case with terminal enclosure located at one end
Heating Element:  Metal sheathed heating elements embedded in specially treated aluminium heat emitters
Installation: Ceiling mounting using brackets provided.The brackets also provide secure fixing points for suspension
Optional adjustable angle wall mount bracket (model ESP2-B)
Suitable for buildings with ceiling heights up to 10m
Guarantee:  1 year
Energy saving heating in a Brighton Theatre

Cassettes omit no light or noise output making them ideal for heating theaters, class rooms and performance spaces 

Performance Data

Model kW Volts Recommended
Mounting Height (m)
Dimensions (mm) Weight (kg)
Min Max L W D
ESP2-09 0.9 230/1 3.0 4.0 1550 150 60 5.8
ESP2-12 1.2 230/1 3.0 4.0 1550 150 60 5.8
ESP2-18 1.8 230/1 3.5 6.0 1550 250 60 9.9
ESP2-24 2.4 230/1 3.5 6.0 1550 250 60 9.9
ESP2-30 3.0 230/1 or 400/3 3.5 8.0 1550 350 60 13.9
ESP2-36 3.6 230/1 or 400/3 3.5 8.0 1550 350 60 13.9
rms 2

Radiant cassettes are incredibly unobtrusive making them ideal for heating assembly halls, sports halls and class rooms

Radiant cassettes are ideally suited to squash courts

Radiant cassettes free up wall space making them ideal for village halls, gymnasiums and classrooms 

How it Works

ESP Radiant Cassettes are designed to heat commercial and industrial spaces and are especially suited to buildings with high ceilings such as sports halls.

The cassettes are generally ceiling mounted or suspended at high level in a grid formation to give good area coverage.  Alternatively they can be wall mounted using the optional wall bracket.  Once switched on, the radiant cassettes emit long wave radiant energy providing the quickest means of heating a space. 

ESP radiant cassettes are the most economic means of heating larger spaces.  Savings of up to 30% can be made when compared to conventional convection based heating systems.  There are two reasons for this:

  1. Temperature Gradient.  When using fan heaters to heat a large space a typically temperature gradient of 2.5°C per metre would be expected.  The equivalent figure for a building heated with energy saving radiant cassettes is 0.3°C.  Therefore in a 5m sports hall, the air temperature at high level would be more almost 15°C lower when using energy saving radiant cassettes.
  2. Radiant effect.  In a building heated with energy saving Radiant Panels, the experienced temperature can be as much as 4°C warmer than the actual air temperature.  This means that the thermostat can set up to 4°C lower than with a conventional heating system whilst still maintaining a comfortable temperature.


If you would like the experts at BN Thermic to select a suitable heating for your application, please click below 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 maximum economy and performance your selection needs to meet two requirements:

  1. Sufficient kW output
  2. Correct cassette distribution

Estimating kW Output

In simple terms the output of the installed ESP radiant cassettes 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.

Correct Cassette Distribution

ESP radiant cassettes can be ceiling mounted or suspended at high level.  For lowest capital cost, we suggest using the highest practical mounting height, whilst using the minimum possible number of radiant panels needed to achieve the estimated kW requirement.   Ensure that the distance between individual cassettes does not exceed the distance between the cassettes and the floor.


ESP Radiant Cassettes

suspended from the ceiling in an evenly spaced grid so that the distances between the cassettes
(A & B) are not greater than the distance between the cassettes and the floor.