The Homematic IP HmIP-eTRV-B-2 smart radiator thermostat enables easy and modern heating control in your everyday home, all via an app on your phone. It is designed for users who want precise temperature control, energy savings and smart features without complicated installation or additional cables.

Evaluation of key product features

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This thermostat is designed for anyone who wants to turn their radiators in their apartment, house or office into part of a smart home and make their life easier by always maintaining the optimal temperature. It's great for the young (and young at heart) who want quick control and flexibility, while being simple enough for anyone who wants to reduce energy consumption without complications.

A top advantage is the ability to set temperatures or schedules directly via the Homematic IP app and integration with voice assistants such as Google Assistant and Amazon Alexa. The open window detection function automatically reduces heating when it detects a sudden drop in temperature, which means additional savings and greater comfort in everyday use. Battery power allows for completely wireless installation and requires no wiring - just replace the existing thermostatic valve with a new smart one, connect it to the app and you're all set.

It works by precisely adjusting the temperature to your preferences and a schedule that you can set and change remotely. The advanced algorithms in the thermostat automatically adjust the heating based on the circumstances in the room, which makes it stand out compared to regular thermostats. So you no longer have to worry about whether you left the heating on or how to regulate the temperature during your daily chores.

The elegant look and quiet operation allow for discreet installation, while the app also offers the option of group control of multiple thermostats at once – great for larger rooms or different rooms in the apartment. With connectivity to the Homematic IP smart ecosystem, you can upgrade your entire home automation, all with a user-friendly and modern approach.

Same summary

The Homematic IP HmIP-eTRV-B-2 smart thermostat allows wireless control of radiator heating, which is especially convenient in apartments or houses where you want to quickly and easily upgrade an existing system without interfering with the electrical wiring. Battery power means that the installation is also suitable for tenants or anyone who does not want to carry out construction work. The open window detection function increases energy efficiency, and adjustment via the app makes everyday use easier. It is less suitable for users who have an underfloor heating system or need a wired connection and more advanced integration with complex smart home networks.

Recommendation source: Enaa guides and team experiences.

User view

The product is often the choice of those looking for a simple solution for digitalizing home heating without major interventions or technical knowledge. It is especially suitable for users who want more control over the temperature in the room and at the same time appreciate the convenience of managing everything via a mobile application. In practice, such a thermostat is useful mainly in apartments and houses with radiators, where there is no possibility of a wired connection or where the installation of existing thermostats is time-consuming.

Many users appreciate the wider product range and flexibility of the Homematic IP brand ecosystem, as it allows for later expansion with additional smart devices in the same environment.

Why buy at Enaa

When you buy from Enaa, you get expertly selected products that are clearly presented in terms of compatibility and practical use in different environments. A simple filter overview and user-friendly information make it easy to choose the right thermostat for your home.

Answers to frequently asked questions

Can I install this thermostat myself without the help of a professional?

Yes, installation is usually simple and suitable even for users without special technical knowledge, as it takes place without interfering with the electrical wiring.

Is the thermostat compatible with underfloor heating?

The HmIP-eTRV-B-2 model is designed primarily for controlling heating with radiators, therefore it is not suitable for underfloor heating.

What happens if I open a window during heating?

The thermostat has an open window detection function. When detected, it temporarily reduces heating, thereby contributing to greater energy efficiency.

Does the thermostat work if the internet goes out?

Basic settings work locally, but management via the app is limited if there is no internet connection.

How often should the batteries in the thermostat be changed?

The average battery life depends on usage and battery quality, but is usually sufficient for several months of normal operation.

Description updated: May 2026