A black digital thermostat control panel with a red display screen showing the time, day, temperature, and control icons. The brand name 'The Sphere' is visible in the top right corner of the screen.
A black digital floor thermostat display screen showing a red user interface with the temperature 23 degrees Celsius, set against a plain white background.
A black digital thermostat control panel with a colorful red display screen showing the temperature 23 degrees Celsius and various interface icons, set against a plain white background.
Thermosphere DC-B-01 230V AC terminal block module on a black backplate, showing eight green screw terminals with printed connection labels and a white central label.
A white smart thermostat control panel with a red display screen showing the temperature 23 degrees Celsius and the Sphere logo in the top right corner.
A white smart thermostat control panel with a red display screen showing the time, temperature, and control icons. The brand name 'ThermoSphere' is visible in the top right corner of the screen.
A white rectangular smart thermostat display showing a red interface with the number 23 and temperature settings, branded Sphere.
Thermosphere DC-W-01 AC 230V electrical contactor module with terminal blocks and ventilation slots on a white faceplate.
A modern bathroom scene with a freestanding white bathtub, gray tiled walls and floor, white towel bars, a small red digital thermostat on the wall, and a potted green plant. A blue patterned underfloor heating mat is visible in the foreground.
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A black digital thermostat control panel with a red display screen showing the time, day, temperature, and control icons. The brand name 'The Sphere' is visible in the top right corner of the screen.A black digital floor thermostat display screen showing a red user interface with the temperature 23 degrees Celsius, set against a plain white background.A black digital thermostat control panel with a colorful red display screen showing the temperature 23 degrees Celsius and various interface icons, set against a plain white background.Thermosphere DC-B-01 230V AC terminal block module on a black backplate, showing eight green screw terminals with printed connection labels and a white central label.A white smart thermostat control panel with a red display screen showing the temperature 23 degrees Celsius and the Sphere logo in the top right corner.A white smart thermostat control panel with a red display screen showing the time, temperature, and control icons. The brand name 'ThermoSphere' is visible in the top right corner of the screen.A white rectangular smart thermostat display showing a red interface with the number 23 and temperature settings, branded Sphere.Thermosphere DC-W-01 AC 230V electrical contactor module with terminal blocks and ventilation slots on a white faceplate.A modern bathroom scene with a freestanding white bathtub, gray tiled walls and floor, white towel bars, a small red digital thermostat on the wall, and a potted green plant. A blue patterned underfloor heating mat is visible in the foreground.

ThermoSphere Dual Control Smart Thermostat

ThermoSphere
Colour: White
Price:
£167.99

Description

The ThermoSphere Dual Control is a smart touchscreen thermostat that controls electric underfloor heating and a towel rail or mirror demister from the same unit, switching both loads independently through two separate relay outputs.

Key Benefits

  • Smart touchscreen thermostat controls two separate heating loads from one unit
  • Primary relay rated 16A (3600W) for underfloor heating; secondary relay rated 5A (1125W) for a towel rail or mirror demister
  • Maximum combined load of 20A (4600W)
  • Install in landscape or portrait orientation, with a choice of eight coloured backgrounds
  • Smart adaptive start learns how long your floor takes to heat up to reduce energy consumption
  • Open window sensor automatically switches off heating if a door or window is opened
  • Built-in ambient temperature sensor plus an external floor temperature sensor
  • Available in white (DC-W-01) or black (DC-B-01)

Applications

Ideal for bathrooms, ensuites and wetrooms where underfloor heating and a heated towel rail or mirror demister need to be controlled together from a single wall-mounted thermostat, reducing the number of controls on the wall.

Performance & Features

The touchscreen display shows current and target temperature, with landscape or portrait mounting and eight background colours to suit the room. Adaptive start learning and the open window sensor work together to reduce running costs without compromising comfort.

Compatibility

Compatible with the full ThermoSphere underfloor heating cable, mesh and foil ranges via the primary relay, plus a compatible towel rail or mirror demister on the secondary output. Fits a standard 45mm deep back box.

Supplied by Millcot as part of our full ThermoSphere underfloor heating range.

Technical Specifications

  • Supply voltage: 230/240V, 50/60Hz
  • Primary relay: 16A (3600W)
  • Secondary relay: 5A (1125W)
  • Max combined load: 20A (4600W)
  • Temperature range: 5–35°C
  • Size: W129 x H88 x D48mm
  • Protection rating: IP30
  • Mounting: 45mm deep back box
  • Sensor rating: NTC 10kΩ @ 25°C
  • Warranty: 3 years

What's Included

  • 1 x ThermoSphere Dual Control thermostat
  • 1 x Installation guide
  • 1 x 3m floor temperature sensor probe
  • 1 x 2m sensor conduit
  • 2 x Fixing screws

Downloads

FAQs

Can this control underfloor heating and a towel rail at the same time?
Yes, the primary relay (16A) is designed for underfloor heating while the secondary relay (5A) controls a towel rail or mirror demister independently, both from the same thermostat.

What's the maximum load it can handle?
The maximum combined load across both relays is 20A (4600W) — the primary relay is rated 16A (3600W) and the secondary relay 5A (1125W), so check your circuit design doesn't exceed either individually.

Can I mount it in portrait as well as landscape?
Yes, the thermostat can be installed in either landscape or portrait orientation, with a choice of eight background colours.

What's included in the box?
The thermostat, an installation guide, a 3m floor temperature sensor probe, a 2m sensor conduit and 2 fixing screws.

Does it need a deep back box?
Yes, it requires a standard 45mm deep back box for mounting.

Should this be installed by a qualified electrician?
Yes, as with all mains electrical heating controls, installation should be carried out by a qualified electrician in line with UK wiring regulations.