Smart thermostat Avatto WT20R-EH-16A-W-WiFi — Wi‑Fi control, 16A relay, white

Avatto WT20R-EH-16A-W-WiFi is a smart Wi‑Fi thermostat designed for direct control of electric heating devices, including electric underfloor heating. The device features a compact white wall-mount design, a 16A relay for switching loads, and support for both floor and room sensors to provide accurate temperature regulation. Connectivity via Wi‑Fi and compatibility with common cloud apps enables remote monitoring, scheduling and basic energy-saving functions for residential and small commercial environments.

Advantages

The thermostat supports Wi‑Fi control through Tuya and Smart Life apps, allowing remote operation, grouping of multiple devices and family sharing for multi-user access. Voice assistant compatibility with Amazon Alexa, Google Home and other platforms provides hands-free control. The unit offers weekly programming with up to six time slots per day, precise temperature setting to 0.5°C increments, adjustable hysteresis and built-in overheating protection. Adjustable backlight brightness reduces disturbance at night.

Suitable for

• Electric underfloor heating systems using an NTC3950 10K sensor
• Direct control of resistive electric heaters and similar loads up to 16A
• Residential rooms, apartments and small offices requiring scheduled temperature control
• Smart home setups that use Tuya/Smart Life or voice assistants for automation

Key specifications

• Relay load rating: 16 A maximum for direct heating device switching
• Sensor type supported: NTC3950, 10K (floor and room sensor inputs)
• Temperature control range: 5–45 °C; room measurement range up to 99 °C
• Measurement accuracy: ±1 °C; setpoint resolution 0.5 °C
• Hysteresis adjustment: 0.5–10 °C to reduce short-cycling
• Power supply: 95–240 V AC, 50–60 Hz; power consumption <1.5 W
• Ingress protection: IP20; ambient humidity 5–95% RH (non‑condensing)

How to use

Install the thermostat on a standard wall box and wire the supply, load and sensor according to the installation instructions for electric heating systems. Use the device menu to select sensor type and calibrate temperature if required. Connect the thermostat to your Wi‑Fi network and add it to the Tuya or Smart Life app to enable remote control, scheduling and device grouping. Configure weekly programs or switch to manual mode as needed. Ensure the relay load does not exceed 16 A and that wiring and protective devices comply with local electrical codes.

Recommendations

For reliable floor temperature control, mount the floor sensor at the recommended depth and avoid placing the room sensor near heat sources or drafts. Use hysteresis and weekly programming to limit relay switching frequency and improve long-term durability. Verify compatibility of the connected heater type and ensure proper circuit protection when installing the thermostat.