Thermiq Radex, BLACK EDITION
3 F820 31
3 F820 31
RADIATOR Smart Thermostat, Black Edition,
Main supply 230V, connection with Thermiq Connect with ZigBee,
Used for radiators or underfloor heating,
Can connect with up to six Thermiq HeatCaps.
Main supply 230V, connection with Thermiq Connect with ZigBee,
Used for radiators or underfloor heating,
Can connect with up to six Thermiq HeatCaps.
| IDENT | EAN | COLOR | POWER SUPPLY | L | H | L1 |
| 3 F820 31 | 3838963244950 | Black | 230 V AC, 50 Hz | 80 | 80 | 23 |
The HERZ Thermiq system offers flexible communication options, allowing connection through three different versions, depending on the product type:
• Wired
• Wi-Fi
• Zigbee
Each version ensures reliable data exchange between room controllers, actuators, and the central control unit, while maintaining compatibility across the HERZ Thermiq ecosystem.
The HERZ Thermiq RADEX is a programmable surface-mounted Internet temperature controller powered by 230 V AC, designed for underfloor or radiator heating systems. It supports both heating and cooling operation modes and communicates via ZigBee/868 MHz wireless technology.
The device can control up to six electronic wireless heads (Thermiq HeatCap) in one zone, ensuring optimal comfort and energy efficiency by measuring temperature away from the radiator. Its advanced binding function enables both wireless control via ZigBee and wired connection.
When connected to the HERZ Thermiq Internet gateway, the controller can be operated remotely via the HERZ Thermiq App. Alternatively, it can also function as a standalone unit connected by wire to the receiver, with full offline scheduling capability.
Additional features include programmable relay type selection, key lock function, and adjustable minimum and maximum set temperature limits.
Wireless control of underfloor heating
1. HERZ Thermiq Connect
The central component for creating a wireless ZigBee network. It serves as an interface between ZigBee devices and a 2.4 GHz Wi-Fi or Ethernet router. The gateway enables control and monitoring of all connected ZigBee devices via the HERZ Thermiq App.
2. HERZ Thermiq Radex
The thermostat can be connected to the control box FloorHub Wireless in two ways:
• Zones “A” and “B” – wired connection (the controller can also be powered from these zones).
• Zones “1…6” – wireless connection established through the binding function between the thermostat and the
selected zone in the control box. Wireless binding is possible after the thermostat is added to the ZigBee network
via the Internet gateway Thermiq Connect.
The thermostat maintains the desired room temperature by switching the relevant zone in the control box on or off, thereby activating the thermoelectric actuators on the manifold. When connected to the Internet gateway, the temperature can be conveniently managed via the HERZ Thermiq App.
3. HERZ Thermiq FloorHub Wireless
Enables regulation of up to 8 heating zones – a combination of 2 wired and 6 wireless thermostats. Wired control (zones “A” and “B”) is achieved through a plug-in module inside the control box, wirelessly linked to the corresponding thermostat. Wireless communication uses ZigBee 3.0 technology.
The binding function allows direct wireless connection between the control box (zones 1…6) and dedicated thermostats through the Internet gateway. The control box also provides circulation pump and boiler control functionality.
4. HERZ Thermiq App
Enables remote control and monitoring of all connected smart devices. The app operates on the Tuya cloud platform, providing a secure, user-friendly, and highly compatible environment for system configuration and management.
Wireless control of the radiator heating
1. HERZ Thermiq Connect
The central component for creating a wireless ZigBee network. It serves as an interface between ZigBee devices and a 2.4 GHz Wi-Fi or Ethernet router. The gateway enables control and monitoring of all connected devices via the HERZ Thermiq App.
2. HERZ Thermiq Radex
The key element for efficient radiator heating control. Two-way communication between the thermostat and the electronic radiator head takes place at regular intervals via ZigBee radio. The thermostat can synchronize directly with the radiator head without requiring an Internet gateway. When connected to the Internet gateway, temperature control and scheduling can be managed remotely through the HERZ Thermiq App.
3. HERZ Thermiq HeatCap
Designed to regulate radiator heating with high precision. It must be paired with a master thermostat to operate correctly. Up to six wireless heads can be paired with a single thermostat within the same room or heating zone.
4. HERZ Thermiq App
Enables convenient remote control and monitoring of all connected smart devices. Operating on the Tuya cloud platform, it provides a secure, user-friendly, and flexible solution for home and building temperature management.
5. HERZ Thermiq MultiSwitch
Allows control of a heat source such as a gas boiler or circulation pump. Communication is based on ZigBee 3.0 wireless technology, coordinated via the Internet gateway for seamless system integration.
• Wired
• Wi-Fi
• Zigbee
Each version ensures reliable data exchange between room controllers, actuators, and the central control unit, while maintaining compatibility across the HERZ Thermiq ecosystem.
The HERZ Thermiq RADEX is a programmable surface-mounted Internet temperature controller powered by 230 V AC, designed for underfloor or radiator heating systems. It supports both heating and cooling operation modes and communicates via ZigBee/868 MHz wireless technology.
The device can control up to six electronic wireless heads (Thermiq HeatCap) in one zone, ensuring optimal comfort and energy efficiency by measuring temperature away from the radiator. Its advanced binding function enables both wireless control via ZigBee and wired connection.
When connected to the HERZ Thermiq Internet gateway, the controller can be operated remotely via the HERZ Thermiq App. Alternatively, it can also function as a standalone unit connected by wire to the receiver, with full offline scheduling capability.
Additional features include programmable relay type selection, key lock function, and adjustable minimum and maximum set temperature limits.
Wireless control of underfloor heating
1. HERZ Thermiq Connect
The central component for creating a wireless ZigBee network. It serves as an interface between ZigBee devices and a 2.4 GHz Wi-Fi or Ethernet router. The gateway enables control and monitoring of all connected ZigBee devices via the HERZ Thermiq App.
2. HERZ Thermiq Radex
The thermostat can be connected to the control box FloorHub Wireless in two ways:
• Zones “A” and “B” – wired connection (the controller can also be powered from these zones).
• Zones “1…6” – wireless connection established through the binding function between the thermostat and the
selected zone in the control box. Wireless binding is possible after the thermostat is added to the ZigBee network
via the Internet gateway Thermiq Connect.
The thermostat maintains the desired room temperature by switching the relevant zone in the control box on or off, thereby activating the thermoelectric actuators on the manifold. When connected to the Internet gateway, the temperature can be conveniently managed via the HERZ Thermiq App.
3. HERZ Thermiq FloorHub Wireless
Enables regulation of up to 8 heating zones – a combination of 2 wired and 6 wireless thermostats. Wired control (zones “A” and “B”) is achieved through a plug-in module inside the control box, wirelessly linked to the corresponding thermostat. Wireless communication uses ZigBee 3.0 technology.
The binding function allows direct wireless connection between the control box (zones 1…6) and dedicated thermostats through the Internet gateway. The control box also provides circulation pump and boiler control functionality.
4. HERZ Thermiq App
Enables remote control and monitoring of all connected smart devices. The app operates on the Tuya cloud platform, providing a secure, user-friendly, and highly compatible environment for system configuration and management.
Wireless control of the radiator heating
1. HERZ Thermiq Connect
The central component for creating a wireless ZigBee network. It serves as an interface between ZigBee devices and a 2.4 GHz Wi-Fi or Ethernet router. The gateway enables control and monitoring of all connected devices via the HERZ Thermiq App.
2. HERZ Thermiq Radex
The key element for efficient radiator heating control. Two-way communication between the thermostat and the electronic radiator head takes place at regular intervals via ZigBee radio. The thermostat can synchronize directly with the radiator head without requiring an Internet gateway. When connected to the Internet gateway, temperature control and scheduling can be managed remotely through the HERZ Thermiq App.
3. HERZ Thermiq HeatCap
Designed to regulate radiator heating with high precision. It must be paired with a master thermostat to operate correctly. Up to six wireless heads can be paired with a single thermostat within the same room or heating zone.
4. HERZ Thermiq App
Enables convenient remote control and monitoring of all connected smart devices. Operating on the Tuya cloud platform, it provides a secure, user-friendly, and flexible solution for home and building temperature management.
5. HERZ Thermiq MultiSwitch
Allows control of a heat source such as a gas boiler or circulation pump. Communication is based on ZigBee 3.0 wireless technology, coordinated via the Internet gateway for seamless system integration.
EG-Conformity
By affixing the CE mark to the unit the manufacturer declares that the HERZ Thermiq conforms to the following relevant safety regulations:
• EU low voltage directive 2014/35/EU
• EU electromagnetic compatibility directive 2014/30/EU
• EU RoHS Directive 2011/65/EU
• EU WEEE Directive 2012/19/EU (Reg.nr. DE 23479719)
Conformity has been verified and the corresponding documentation and the EU declaration of conformity are kept on file by the manufacturer.
Declaration of conformity - SLO, ENG, DEU
By affixing the CE mark to the unit the manufacturer declares that the HERZ Thermiq conforms to the following relevant safety regulations:
• EU low voltage directive 2014/35/EU
• EU electromagnetic compatibility directive 2014/30/EU
• EU RoHS Directive 2011/65/EU
• EU WEEE Directive 2012/19/EU (Reg.nr. DE 23479719)
Conformity has been verified and the corresponding documentation and the EU declaration of conformity are kept on file by the manufacturer.
Declaration of conformity - SLO, ENG, DEU
| Parameter |
Value |
Power supply |
230V AC 50Hz |
Max. Current |
3(1)A |
Temp. setpoint range |
5,0°C to 45,0°C |
Display temp. Accuracy |
0,5°C |
Control algorithm |
TPI Hysteresis (±0.1°C to ±2°C) |
Communication |
ZigBee 3.0 RF 868MHz |
Control output |
NO/COM voltage-free |
Dimensions [mm] |
80 x 80 x 23 |
LCD icons description + Button description
LED icon description
1. Current temperature
2. ZigBee network connection indicator
3. Receiver binding indicator
4. Heating indicator (icon is animating when there is heating demand)
5. Cooling indicator (icon is animating when there is cooling demand)
6. Clock
7. Temperature unit
8. Setpoint temperature
9. Temporary override mode
10. Schedule mode icon
11. Program number
12. Day of the week indicator
13. Button lock
14. Settings icon
Button description:
1. ˝DOWN˝ button
2. ˝OK˝ button
3. ˝UP˝ button
Safety information and installation
Use in accordance with national and EU regulations. Use the device only as intended, keeping it in a dry condition. The product is for indoor use only. Please read the entire manual, before installation or use. Installation must be performed by a qualified person with appropriate electrical qualifications, in accordance with the standards and regulations in force in a given country and in the EU. The manufacturer is not responsible for noncompliance with the instructions.
For the entire installation, there may be additional protection requirements, which the installer is responsible for.
Use in accordance with national and EU regulations. Use the device only as intended, keeping it in a dry condition. The product is for indoor use only. Please read the entire manual, before installation or use. Installation must be performed by a qualified person with appropriate electrical qualifications, in accordance with the standards and regulations in force in a given country and in the EU. The manufacturer is not responsible for noncompliance with the instructions.
For the entire installation, there may be additional protection requirements, which the installer is responsible for.
