Versatile thermostat for complete control of HVAC systems - fan coil, underfloor heating, ventilation and cooling. Compatible with external temperature sensors. Powered by Shelly - for smart automation, remote access and effortless integration with the most popular platforms. Underfloor heating valve control, fan coil control, ventilation control - AC and DC fans are supported, including control of 10 V DC fans via an analogue output. Heat source control - Utilises a dry contact relay to control heat sources such as gas burners, pellet burners etc. Compatible with electric underfloor heating - The thermostat can control a connected Shelly relay to switch the heating on or off based on the temperature settings. RS485/MODBUS control. Frost protection function - Prevents damage to the heating pipes. Integrated humidity sensor. Temperature and humidity correction - Adjusts thermostat readings for more accurate results. No hub required. Wi-Fi and Bluetooth connectivity. Wi-Fi range extender and BLE gateway. Powered by Shelly - Equipped with a Shelly chip that supports all Shelly functions. Smart schedules based on time or sunrise and sunset. Highly compatible. Easy control via the Shelly Smart Control app, most platforms and protocols and voice assistants. Use it with Alexa, Home Assistant or your favourite automation system. Common uses: thermostat, underfloor heating, heating and cooling, energy saving, valves.