Radiator thermostat

Control your radiators smartly - ideally to suit your daily routine.. You can do this easily with the radiator thermostat.

Experience heating comfort and save energy costs at the same time.

When you come home in winter, you want comfortably heated rooms. The Stiftung Warentest 2017 test winner gives you the heat exactly when you need it. Three adjustable heating profiles and 13 possible changes per day help you. In addition, you save up to 33 % of the heating costs* with the fine adjustment.

A comfortable temperature at all times

Control the room temperature according to your needs, whether you're at home or out and about.

You can do this easily via the app, directly on the device using the control dial, or conveniently via
voice control (using Amazon Alexa or Google Assistant).

Safe and easy installation

Installation is quick and easy with no need to interfere with the heating system or to drain water.

The scope of delivery includes a high-quality metal union nut for secure mounting on all common radiator valves with a M30 thread.

Window open detection

If you open a window, the radiator automatically lowers the temperature so that you don't waste energy.

Notice open windows and doors with the window open detection, or with even more precision thanks to a Homematic IP window and door contact.

The easy way to save on heating costs and CO₂emissions

You can easily set the individual temperature curves in the Homematic IP app.

Up to three adjustable heating profiles and 13 changes per day allow you to have the heating on only when you want it. The window open detection ensures that the temperature is lowered during ventilation.

Homematic IP automates hydraulic balancing

Fraunhofer IEE confirms that the Homematic IP radiator thermostat automatically performs dynamic and adaptive balancing on the radiator.

Homematic IP thus eliminates the need for the expensive installation of presettable valves, which was previously necessary, and thus makes hydraulic balancing much easier.

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The Homematic IP Access Point or the CCU3 central control unit is required to use this product.

Our products in a new dimension.

Rotate the product in all directions, zoom in and experience it in three dimensions. This gives you a detailed picture of your favourite products.

How to teach-in devices for room climate control

With Homematic IP controlling the room climate is easy. In this video we show you how to teach-in devices for room climate control like for example a radiator thermostat or an optical sensor that detects if the window is open or closed.

Your advantages at a glance

Do you want to live more safely, save money and protect the environment, or simply increase your living comfort? There are many good reasons for a Smart Home. Find out more now!

Your advantages at a glance

Do you want to live more safely, save money and protect the environment, or simply increase your living comfort? There are many good reasons for a Smart Home. Find out more now!

Radiator thermostat – Evo

Smart technology and a modern design in one device: The radiator thermostat – Evo makes conventional radiators smart and provides and optimum room climate at all times.

Wall thermostat with humidity sensor

Control your indoor climate even more efficiently with a smart wall thermostat.

Window and door contact – optical, plus

Detect open windows instantly and make your heating or alarm function even smarter. And do it easily via the window and door contact with its very long battery life.

Homematic IP: Smart living. Simply exciting.

Homematic IP means modern, flexible and secure technology from the European market leader*. Let the advantages of our system win you over, and start living smarter straight away.

Homematic IP

With some smart home providers, you have to make a choice: Do you have everything wired, or do you go fully wireless? Some systems are also hermetically sealed and do not accept devices from other manufacturers. Here at Homematic IP, we have a different approach. We are guided by you!

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Die Homematic IP App

Konfigurieren Sie in der Homematic IP App alle Einstellungen für Ihr Smart Home, steuern, regeln und überblicken Sie damit jederzeit Ihre Geräte. Es werden keine persönlichen Daten erhoben, außer der IP-Adresse.

The Homematic IP app

Configure all the settings for your smart home in the Homematic IP app, and use it to control, regulate and monitor your devices whenever you want – without providing any personal data!

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Homematic IP Wired

A smart home system is particularly robust, interference-proof and reliable when the devices communicate with each other via wired connections. And data transmission is very fast with cables, too. That all comes together with Homematic IP Wired.

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Always here for you and your queries.

Whether you have a question about a product, something isn’t working as you wanted, you’re looking for a specialist partner, or you simply want to give us feedback: we are always here to help.

FAQs

This is where you’ll find the most important questions and our answers about our smart home solutions.

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Service

Have you purchased a Homematic IP product and now have questions about how it works? Our technical support team will be happy to help you.

Specialist tradespeople

Are you looking for a good specialist tradesperson near you? Simply use the convenient search function here on our website.

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Dealers

You can get Homematic IP products and good advice all over Germany. Find the right dealer near you here.

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Innovations, ideas, impulses: your news

Get first-hand news about the latest innovative smart home solutions.

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Use Cases (field_use_cases)

The future of the smart home control unit CCU3: The next chapter in a success story

CCU3 becomes OpenCCU: eQ-3 is gradually handing over the further development of the popular control unit to the Homematic IP community.

08. July 2025

Available from now on: the new Homematic IP glass series

Homematic IP presents the elegant and innovative glass series, which is available from now on.

17. June 2025

New energy dashboard, DoorBird integration and many more functions for the Homematic IP app

In addition to the eagerly awaited integration for DoorBird video door stations, the update 3.5.13 for the free Homematic IP app contains numerous other new features. The new version will be rolled out gradually from now on.

27. May 2025

DoorBird and Homematic IP now connected - for greater convenience and security.

Access control is now even smarter: The announced cloud-to-cloud integration between DoorBird and Homematic IP will be released with the Homematic IP app update 3.5.13.

26. May 2025

* In combination with window and door contacts and depending on user behaviour, structural conditions of the building and the existing heating system.

Product Variants

Radiator thermostat

Radiator thermostat (UK)

Order information

Product Name (Short)

HmIP-eTRV-2

Item Number

140280A0

EAN Code

4047976402809

Technical data

Supply voltage

2x 1.5 V LR6/Mignon/AA

Current consumption

120 mA max.

Typical battery life

2 years (typical)

Degree of protection

IP20

Dimensions (W x H x D)

58 x 71 x 97 mm

Ambient temperature

0 to 50 °C

Weight

205 g (including batteries)

Radio frequency

868.0-868.6 MHz/869.4-869.65 MHz

Typ. open area RF range

300 m

Connection

M30 x 1.5 mm

Other

To enable operation, the device has to be connected with one of the following solutions: Homematic IP Access Point with free smartphone app and free cloud service, Third-party solutions of partners