On cold winter nights, temperatures can quickly drop below zero. If a house cools down too much, the water in the pipes begins to freeze. It expands, causing fine cracks in the pipes, and the next morning the basement is suddenly flooded.
To prevent such annoying and expensive damage from occurring in the first place, you should always heat your house sufficiently – even when you are away, for example, when you go on winter vacation.
It is not always easy to keep an eye on the temperature. You can set up heating schedules, but in winter the thermometer can drop suddenly and frost risk rises. A smart home adds safety: Shelly devices automatically monitor temperature and regulate before frost can cause damage. Temperature and humidity sensors detect when rooms are cooling down or risk frost and maintain a safe minimum temperature.
Smart thermostats control heating precisely, even in rarely used rooms such as basements or holiday homes. You can manage everything remotely in the app and receive alerts if anything looks wrong. Your smart home protects you from frost damage and expensive repairs, even during longer absences.
How does your smart home know when to intervene? Smart radiator valves like Shelly BLU TRV provide precise temperature control and automations for highly effective frost protection. The device measures temperature at the valve and opens or closes automatically to precisely keep your defined minimum temperature.
For seldom-used rooms, create targeted frost-protection scenes in the app: if temperature drops below your threshold, BLU TRV briefly heats to prevent pipes from freezing, without continuous heating. A Boost mode quickly raises temperature to your target when needed.
Want even more precise measurements? Use H&T Gen3. Installed centrally in a room, these compact temperature and humidity sensors measure indoor temperature and humidity accurately. If a room gets too cold, they signal the thermostat to act.
New: Shelly BLU H&T ZB. While classic H&T devices communicate via Bluetooth, BLU H&T ZB integrates via Zigbee and it can both receive and send commands. As temperatures approach your threshold, Shelly BLU TRV valves react automatically so the minimum temperature is never undercut.
High humidity is flagged as well – critical in winter because warm air condenses on cold walls or windows, encouraging mold. This risk is higher in poorly heated or ventilated rooms (bathrooms, basements). Airing and sufficient heating are essential to keep humidity below 60%.
Create scenes in the Shelly App to stay safe when it gets cold. With scenes, you can activate frost protection, start heating or trigger alarms. These automations prevent burst pipes and optimize energy use.
Create a scene via Add scene. Define a WHEN (e.g., temperature < 8 °C AND time > 20:00) and a THEN (open valve, send alert). Choose a BLU H&T sensor as the trigger and your thermostats as the action. Test the scene with a manual simulation.
If you own a holiday home that often stands empty in winter, frost protection is crucial. Smart thermostats such as BLU TRV maintain a safe minimum temperature to protect pipes, heating systems and structure while saving energy. Sensors like BLU H&T monitor all rooms – including the basement – and notify you immediately via app if temperatures drop too far or risk increases.
From the app you can check the status anytime, adjust settings remotely or arrange help on site. With Shelly frost protection you will not return to a frozen or damaged house.
There are further ways to winter-proof your home with Shelly. Depending on the situation, consider the following:
Combine the Wall Display X2i as a central controller with a temperature & humidity sensor such as BLU H&T ZB to monitor and adjust temperature directly on the display. Paired with smart heating control, you manage room climate intuitively by touch.
Frost protection also works with plug-in electric heaters (e.g., storage or direct heaters). Connect the heater to Shelly Plug S Gen3 to automate frost protection. Pair the plug with a temperature sensor to control based on room temperature, remotely, by schedules or by actual temperature.
Relays such as Shelly 1 Gen3/Gen4 are also suitable for frost protection and can be linked with a temperature sensor. Local automation – like all Shelly devices – runs offline without internet and prevents basement or unused-room pipe bursts. You define the logic via scenes.
Typical frost-protection scenes:
Enable these scenes easily in the Shelly App.
Door and window sensors such as Shelly BLU Door/Window fit perfectly into a frost-protection setup.
The sensor detects open windows/doors and signals BLU TRV to pause heating while open – saving energy.
Combine the Wall Display X2i as a central controller with a temperature & humidity sensor such as BLU H&T ZB to monitor and adjust temperature directly on the display. Paired with smart heating control, you manage room climate intuitively by touch.
Frost protection also works with plug-in electric heaters (e.g., storage or direct heaters). Connect the heater to Shelly Plug S Gen3 to automate frost protection. Pair the plug with a temperature sensor to control based on room temperature, remotely, by schedules or by actual temperature.
Relays such as Shelly 1 Gen3/Gen4 are also suitable for frost protection and can be linked with a temperature sensor. Local automation – like all Shelly devices – runs offline without internet and prevents basement or unused-room pipe bursts. You define the logic via scenes.
Typical frost-protection scenes:
Enable these scenes easily in the Shelly App.
Door and window sensors such as Shelly BLU Door/Window fit perfectly into a frost-protection setup.
The sensor detects open windows/doors and signals BLU TRV to pause heating while open – saving energy.
Yes. Smart valves increase comfort and measurably save heating energy. They are also well suited for frost protection.
The BLU H&T ZB sensor supplies temperature and humidity data for intelligent control via Shelly 1 Gen3 and scenes.
Do not switch heating off completely in winter, even when away. Keep every room, including the basement, at ≥ 15 °C.
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