Thermiq HeatCap
3 F820 58
3 F820 58
Thermostatic Radiator Valve,
Connection M28x1,5,
Battery powered (2xAA),
Not stand-alone product - needs to be paired with Thermiq Radex.
Connection M28x1,5,
Battery powered (2xAA),
Not stand-alone product - needs to be paired with Thermiq Radex.
| IDENT | EAN | COLOR | POWER SUPPLY | L1 | D | H |
| 3 F820 58 | 3838963245025 | White | 2 x AA battery | M28 x 1.5 | 50 | 81 |
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 HeatCap is an electronic wireless thermostatic radiator head designed for precise temperature control and optimal energy efficiency. It communicates via Zigbee / RF 868 MHz wireless technology and can be paired with a master thermostat (e.g., HERZ Thermiq RADEX) within the same room or heating zone.
HERZ Thermiq Radex continuously measures the room temperature and therefore adjusts the HeatCap radiator valve opening to maintain the desired setpoint. Up to six heads can be connected to a single thermostat, ensuring balanced temperature regulation even in larger rooms.
When integrated into the HERZ Thermiq system with thermostat Radex and Internet gateway Thermiq Connect, it allows remote configuration and monitoring via the HERZ Thermiq App.
Product highlights
• Measuring room temperature away from the radiator ensures comfort and energy savings
• Extremely quiet operation for maximum user comfort
• Simple, intuitive, and fast installation
• Advanced control algorithm maintains stable and precise temperature
• Remote control via the HERZ Thermiq App (with Internet gateway)
• Group operation – up to 6 heads can work together in one room
• Open window detection – automatically closes the valve when a sudden 1.5 °C drop is detected and restores
heating after 15 minutes
• 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 HeatCap is an electronic wireless thermostatic radiator head designed for precise temperature control and optimal energy efficiency. It communicates via Zigbee / RF 868 MHz wireless technology and can be paired with a master thermostat (e.g., HERZ Thermiq RADEX) within the same room or heating zone.
HERZ Thermiq Radex continuously measures the room temperature and therefore adjusts the HeatCap radiator valve opening to maintain the desired setpoint. Up to six heads can be connected to a single thermostat, ensuring balanced temperature regulation even in larger rooms.
When integrated into the HERZ Thermiq system with thermostat Radex and Internet gateway Thermiq Connect, it allows remote configuration and monitoring via the HERZ Thermiq App.
Product highlights
• Measuring room temperature away from the radiator ensures comfort and energy savings
• Extremely quiet operation for maximum user comfort
• Simple, intuitive, and fast installation
• Advanced control algorithm maintains stable and precise temperature
• Remote control via the HERZ Thermiq App (with Internet gateway)
• Group operation – up to 6 heads can work together in one room
• Open window detection – automatically closes the valve when a sudden 1.5 °C drop is detected and restores
heating after 15 minutes
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
| Specification | Value |
| Power supply | 2× AA battery |
| Communication | Wireless with ZigBee compatible controllers (868 MHz + ZigBee) |
| Thread size | M30 × 1.5 / M28 × 1.5 |
| IP Protection class | IP30 |
| Dimension [mm] | Φ50 × 81 |
Open window function
The head unit automatically closes the flow to the radiator when a sudden drop in temperature is detected, indicating that a window has been opened. After 15 minutes, the system independently restores normal heating control.
Frost protection
When the HERZ Thermiq HeatCap head is closed, frost protection is automatically activated. If the temperature sensor in the head detects a temperature drop below 5°C, the head opens to supply heat to the radiator and prevent freezing.
User interface
1. LED diode (indicates device status)
2. Function 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.
This product complies with the essential requirements and other relevant provisions of the following EU Directives: EMC 2014/30/EU, Low Voltage Directive LVD 2014/35/EU, RoHS
directive 2011/65/EU.
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.
This product complies with the essential requirements and other relevant provisions of the following EU Directives: EMC 2014/30/EU, Low Voltage Directive LVD 2014/35/EU, RoHS
directive 2011/65/EU.
For the entire installation, there may be additional protection requirements, which the installer is responsible for.
