HeatIt Z-TRM6 Thermostat Z-Wave 800 series

Main features

Z-Wave 800 wireless communication (868.4 MHz) enabling full integration into Z-Wave smart-home networks and support for S0 and S2 security classes.

Three operation modes: Heat, Cool and Eco to meet diverse application requirements including electric underfloor heating, infrared panels or water-based heating.

Integrated room sensor and provision for two external temperature sensors (NTC types) for enhanced measurement flexibility and installation flexibility.

Active power metering: displays real-time power consumption, and allows manual input of measurement values when connected via external relay/contactor.

Master thermostat capability: can serve as a central controller to send set-points or commands to up to 10 other thermostats or external relays through Z-Wave associations.

Robust metal frame and compatibility with common European switch systems (System 55; e.g., Gira, Jung, Merten, Berker) for neat flush mounting.

ZeroX™ detection technology: the relay activates at 0 V crossing to reduce arcing and extend lifespan of switching components.

Smart window-open detection: rapid temperature drop triggers the thermostat to suspend heating to conserve energy.

Display with adjustable brightness, relay status icon, lock-mode/child-lock, weekly scheduling (via gateway), hysteresis/PWM control, temperature calibration and firmware updates via OTA.

Description

The HeatIt Z-TRM6 Thermostat Z-Wave 800 Series in White RAL 9003 is a premium flush-mounted smart thermostat designed for both electric and water-based heating systems. Thanks to its advanced Z-Wave 800 wireless protocol support, the device seamlessly integrates into modern smart-home ecosystems, providing remote control, scheduling and automation possibilities. It features a metal mounting frame compatible with standard European junction boxes and popular switch ranges (System 55), offering secure installation and an elegant design. Built-in room temperature sensing combined with support for up to two external wired sensors ensures precise control across rooms or floors. The Z-TRM6 brings three user modes—Heat, Cool and Eco—allowing you to tailor your heating and cooling behaviour, while the Eco mode can lower set-points for energy efficient periods such as holidays or nights. With integrated active power metering, you gain real-time visibility of your energy consumption, helping you optimise usage and reduce costs. Additional features such as open-window detection, relay status icon, child-lock, adjustable display brightness, and the innovative ZeroX™ technology (which switches the relay at zero crossing to extend service life) make this thermostat a feature-rich choice for smart home and HVAC installations.

Technical Specifications

Specification	Detail
Operating voltage	230 V AC, 50 Hz
Maximum load	16 A / 3600 W (resistive)
Mounting type	Flush-mount, standard European wall box
Operating modes	Heat, Cool, Eco
Temperature range	5 °C to 40 °C
External sensor types	NTC sensors: 6.8 kΩ, 10 kΩ, 12 kΩ, 15 kΩ, 22 kΩ, 33 kΩ, 47 kΩ, 100 kΩ (at 25 °C)
Wireless protocol	Z-Wave 800, 868.4 MHz
Communication security	S0, S2 Authenticated, S2 Unauthenticated
Standby power consumption	< 2 W
Protection class	IP21
Ambient conditions	5–40 °C, 10–85% RH (non-condensing)
Colour	White RAL 9003
Extra functions	Power metering, ZeroX™ relay switching, display dimming, child-lock, open-window detection, associations (up to 10 devices)