What You'll Need

Sinope TH1123WF Smart Thermostat
Neviweb app (iOS or Android)
2.4GHz Wi-Fi network
120V electric heating system (baseboard or convector heaters)
Wire strippers
Wire nuts or push-in connectors
Voltage tester

Before You Start

This is a line-voltage thermostat for 120V electric heating systems. Unlike the low-voltage (24V) smart thermostats used with central furnaces, the Sinope TH1123WF handles 120V power directly, controlling electric baseboard heaters and convector units. This means the thermostat carries high-voltage electricity, and working with it carries more risk than a standard thermostat swap. If you are not comfortable working with line-voltage wiring, hire a licensed electrician.

Voltage Verification

Before purchasing, confirm your heating system runs on 120V. Many electric baseboard systems in North America use 240V, which requires the TH1124WF model instead. Check the breaker that controls your heater -- a single-pole breaker indicates 120V, while a double-pole breaker usually means 240V. You can also check the heater's label or spec plate for voltage information.

Step-by-Step Installation

Turn off power at the breaker. This is critical for line-voltage work. Use a voltage tester to confirm the wires are dead before touching them.
Remove the old thermostat. Note the wiring: you should have LINE wires (from the breaker) and LOAD wires (going to the heater). Document which is which.
Connect wiring to the Sinope:
- Connect the LINE wires (incoming power) to the LINE terminals on the Sinope
- Connect the LOAD wires (going to the heater) to the LOAD terminals
- Follow the wiring diagram in the included installation guide
- Use wire nuts or push-in connectors to secure connections
Mount the thermostat to the electrical box using the included screws.
Restore power at the breaker.
Download the Neviweb app, create an account, and add the thermostat. Connect it to your 2.4GHz Wi-Fi network and configure your preferences.

System Compatibility Notes

The TH1123WF is designed exclusively for 120V electric heating loads up to 1800W (15A). It controls resistive heating elements in baseboard heaters and convectors. It does not work with 240V systems, forced-air furnaces, heat pumps, or any 24V HVAC equipment. If you have multiple baseboard heaters on the same circuit, the combined wattage must not exceed 1800W. For larger loads, you will need a relay or contactor.

The thermostat also supports an optional floor temperature sensor for heated floor systems. The sensor connects to dedicated terminals on the back of the thermostat and allows you to set floor temperature limits to prevent overheating.

Smart Home Integration

The Sinope TH1123WF works with Amazon Alexa, Google Assistant, and Apple HomeKit through the Neviweb platform. For HomeKit, add the thermostat through the Apple Home app using the setup code on the device. The Neviweb ecosystem is designed for multi-zone electric heating control -- you can group multiple Sinope thermostats by room and create unified schedules. IFTTT integration is available for custom automations. Home Assistant users can connect via the Neviweb integration or HomeKit controller.

Energy Saving Features

Multi-zone scheduling through the Neviweb app lets you control each room's temperature independently, heating only the rooms you are using
Energy monitoring tracks consumption for each thermostat so you can see exactly how much each heater costs to run
Eco mode reduces the temperature by a configurable number of degrees during unoccupied periods
Floor sensor support prevents heated floors from overheating, which wastes energy and can damage flooring
Away mode sets all thermostats to a low temperature when you leave, saving energy across the entire home

Troubleshooting

Safety first: Always turn off the breaker and use a voltage tester before opening the thermostat or touching any wires. Line-voltage mistakes can cause serious injury or fire.
Heater not turning on: Verify that LINE and LOAD wires are connected to the correct terminals. Reversing them can prevent the thermostat from working. Use a voltage tester to confirm power is reaching the LINE terminals when the breaker is on.
Thermostat shows wrong temperature: Electric baseboard heaters generate significant heat near the thermostat if it is mounted directly above the heater (common in older installations). The Sinope allows a temperature offset calibration in the Neviweb app to compensate.
Won't connect to Wi-Fi: The TH1123WF requires a 2.4GHz network. If your router uses a combined band name, try creating a separate 2.4GHz SSID for setup. The Neviweb app will walk you through the Wi-Fi connection process.
Tripping the breaker: If the breaker trips when the thermostat calls for heat, the heater load may exceed the thermostat's 15A rating. Check the combined wattage of all heaters on the circuit. If the load is too high, an electrician can add a relay to handle the current.
Factory reset: Reset through the Neviweb app or by holding the button on the thermostat for the duration specified in the manual.

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