SIRO Smart Room Thermostat SL06216W white

Smart Thermostat for Underfloor Heating

The smart thermostat is perfectly suited for underfloor heating systems and gas combination boilers. By simply integrating it into existing heating systems, you benefit from precise temperature control and even heat distribution in all rooms.

Energy-efficient heating control

Thanks to intelligent control algorithms, the Wi-Fi thermostat adjusts the room temperature precisely to the actual needs. This noticeably reduces energy consumption and helps to lower heating costs – ideal for sustainable energy saving.

Modern glass design with touch control.

The high-quality touch switch impresses with its glass surface and the clearly legible large LED display. Temperature, time programs and system status are immediately visible – a combination of modern design and clear user guidance.

Easy installation without a gateway

Connect the device directly to your 2.4 GHz Wi-Fi network, without any additional hub. The simple installation and intuitive setup make the Wi-Fi thermostat operational in just a few minutes.

Extensive app control Smart Life

Control your heating system conveniently via smartphone: Create individual time schedules, develop intelligent heating scenarios, and access all functions on the go. This way, you always retain full control over your home.

Voice control with Alexa and Google Home

Simply adjust the temperature via voice command. Seamless integration with Alexa and Google Home enables hands-free operation, allowing you to focus entirely on your tasks in everyday life.


Our WEEE registration number is: WEEE-Reg.-Nr. DE59943004

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Scope of delivery

• 1xRoom thermostat

Technical details

• Perfomance:90-240Vac 50/60Hz
• Temperature display range:1°C to 70°C
• Temperature setting range:5°C to 35°C
• Limit temperature range:1°C to 70°C
• Display accuracy:0.5 °C
• Contact capacity:3A
• Exit:switching relay
• Insulating state:Normal environment
• Current program:Is set per 1 week as a cycle
• Installation:Installation type (in the wall)
• Size (LxWxH):86 * 86 * 27 mm

Is it possible to display the time permanently on the thermostat's screen?

The display design can be changed in the app. Permanently displaying the time on the screen is not currently possible.

Is the thermostat compatible with my gas boiler with a potential-free switching contact?

The SL06216W room thermostat has the potential-free switching contact at terminals 5 and 6. The SL06116W model has it at terminals 7 and 8.

Are they compatible with any actuator (on the underfloor heating manifold), or are specific actuators required to control underfloor heating?

The thermostat is compatible with any actuator.

How do I correctly install the SIRO Smart Room Thermostat SL06216W?

The room thermostat is mounted in a standard flush-mounted box measuring 86x86 mm. Before installation, switch off the power supply and connect the wires to terminals 1-4 according to the instructions. For gas boilers with potential-free contact, use connections 5 and 6.

What types of heating are compatible with the SL06216W?

The WLAN thermostat is ideal for hot water underfloor heating systems and gas combi boilers. It works with all common 230V actuators and offers both heating and cooling functions for various applications.

Can I use multiple thermostats in different rooms?

Yes, you can manage any number of SIRO Smart Room Thermostats in the Smart Life app. Each device can be individually named and programmed with its own schedules, allowing you to set the optimal temperature for each room.

How accurate is the thermostat's temperature measurement?

The integrated sensor measures the room temperature with an accuracy of ±0.5 °C. The temperature setting range is between 5 °C and 35 °C, while the display can show temperatures from 1 °C to 70 °C.

A deviation of about 1–2 °C is normal for the SIRO Smart Room Thermostat SL06116W. This is because the room air, radiator or actuator, and the internal temperature sensor never behave exactly the same physically. Small differences between the measured and the actual perceived room temperature are therefore technically unavoidable.

What happens to my settings in case of a Wi-Fi outage?

In the event of an outage, your saved settings and schedules will not be lost.
Since the thermostat is controlled via the cloud, all data is stored online and automatically synchronized as soon as the power and internet connection are restored.
During the power outage, no control or temperature regulation is possible, but after restoration, the thermostat will automatically resume operation with the stored cloud data.

Please note that in individual cases, after prolonged power or internet outages, the thermostat may require a new Wi-Fi connection before the connection to the cloud is fully restored.

How long is the warranty and what is included in the delivery?

You receive a 24-month warranty on the device as well as a 60-day satisfaction guarantee. The scope of delivery includes a SL06216W room thermostat and the operating instructions, which you can also download as a PDF.

Operating instructions