LinkedGo ST802-B – Smart HVAC Thermostat
£126.29
The LinkedGo ST802-B is a Shelly-powered smart thermostat for underfloor heating, fan coil units and ventilation systems, with an analogue output for controlling 10V DC fans directly. It adds RS485/MODBUS support for integration into larger centralised HVAC systems, plus an anti-freeze function and built-in humidity sensing.
- RS485/MODBUS support for centralised HVAC systems
- Analogue output drives 10V DC ventilation fans directly
- Anti-freeze function protects pipes during long absences
- Built-in humidity sensing with temperature and humidity offsets
Buy the LinkedGo ST802-B - Smart HVAC Thermostat online in the UK from ShellyUK — genuine Shelly stock with fast UK delivery.
Take control of your comfort with the LinkedGo ST802-B smart thermostat powered by Shelly, designed for complete HVAC management, including underfloor heating, fan coils, ventilation, and cooling. Whether you’re managing a single room or integrating into a larger HVAC system, it offers advanced automation to keep your environment perfectly balanced and energy-efficient.
Featuring the ShellyX chip, this product offers complete Shelly capabilities, ensuring seamless integration with leading smart home systems. With built-in WiFi and Bluetooth, it connects directly to your network without the need for a hub, and even acts as a WiFi range extender and BLE gateway for your smart home ecosystem.
This versatile thermostat directly controls underfloor heating valves, supports fan coil units, and manages AC or DC ventilation fans, including 10V DC fans via its analogue output. For electric underfloor heating, it can work with a connected Shelly relay, automatically adjusting heat based on your chosen temperature. RS485/MODBUS support allows integration into larger, centralised HVAC systems, offering professional-level flexibility.
Safety and precision are at the heart of its design. The anti-freeze function maintains a minimum temperature during long absences to protect your pipes from freezing and bursting. Built-in humidity sensing, along with temperature and humidity offsets, ensures accurate readings and optimal climate control throughout your home or office. Future support for external temperature sensors will further enhance its ability to manage larger spaces effectively.
Thanks to full Shelly capabilities, you can create smart schedules and scenes to heat, cool, or ventilate only when needed, based on time, sunrise/sunset, or in automation with other devices, helping you save energy and lower your bills. The simple, intuitive interface keeps the focus on what matters: setting the perfect indoor climate effortlessly.
Highly compatible and future-ready, it integrates seamlessly with the Shelly Smart Control app, most automation platforms, and open protocols, giving you even more ways to take charge of your HVAC system with ease.
RS485/MODBUS support for centralised HVAC systems
Analogue output drives 10V DC ventilation fans directly
Anti-freeze function protects pipes during long absences
Built-in humidity sensing with temperature and humidity offsets
Where you'd use it
Wet underfloor heating zone control
Connect it to an underfloor heating valve to manage a single room or zone's temperature directly, rather than running the whole system off one central thermostat.
Frost protection during absence
Rely on the anti-freeze function to hold a minimum temperature while you're away for an extended period, protecting pipework from freezing without heating the property normally.
Centralised HVAC via MODBUS
Integrate it into a larger building management setup over RS485/MODBUS where a single app-only thermostat wouldn't fit into the existing centralised control system.
Specification
Connectivity
- WiFi Protocol
- 802.11 b/g/n (2.4 GHz)
- WiFi RF band
- 2401-2486 MHz
- WiFi max. RF power < 20dBm
- Wi-Fi Range (depending on local construction) • up to
- 50m/160ft outdoors • up to 30m/100ft indoors
- Bluetooth protocol
- 4.2
- Bluetooth RF band
- 2400-2483.5 MHz
- Bluetooth max. RF power < 4dBm
- Bluetooth range (depending on local construction) • up to
- 30m outdoors • up to 10m indoors
Physical & Build
- (H x W x L)
- 87 x 87 x 39 mm
Environmental
- Humidity measurement accuracy
- ±5%
- Ambient humidity
- 5-95%
Power & Electrical
- Power supply
- 110-240V ±10% 50/60Hz AC
Other
- Max switching current
- AC 2A resistive load 1A inductive load
- Temperature control range
- 15-35℃
- Temperature measurement accuracy
- ±0.5℃
- Ambient temperature
- -10°C to 55°C / 15°F to 130°F
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