A radiator thermostat is a mechanical or electrical component that regulates the room temperature. With conventional thermostats, you set the temperature with a plastic knob that you turn to the position you want.
With smart thermostats, the temperature can be controlled based on the time of day or by voice command. Intelligent solutions even offer features like open-window detection or location-based control.
Which is the best smart thermostat?
There is no one-size-fits-all answer to this question. First of all, you should think about which smart home system suits you best. You can find a detailed article on this topic here.
Smart thermostats for your smart home
Below, we present the best thermostats to match each smart home system.
tado° – The all-rounder among thermostats
The thermostats from tado° are comfortably ahead of the pack. This is down to both their wide range of features and their stylish design. The tado° thermostat is compatible with all common smart home systems. These include well-known systems such as Amazon Alexa, Google Assistant and Apple HomeKit.
You can control the thermostats either by voice via Siri, Amazon Echo or Google Assistant, or alternatively via the tado° app.
Personally, I really like the design of the app. The rooms are displayed as tiles. In addition, your current location can be used to detect whether you have left the defined geofencing area or are approaching it. The thermostats are then turned up or down automatically. Of course, you can also set fixed times.
You can read our detailed review of the tado° thermostats here (in German).
The tado° starter kit with a bridge and one thermostat is available from the following shops:
(As of: 22 October 2020)
Meross – The best value for money
We can warmly recommend Meross products to everyone. On the one hand, the products are very affordable, and at the same time the company keeps trying to make its products compatible with more and more smart home systems. Meross isn’t resting on its current success but keeps working on its products.
The thermostat is currently only compatible with Amazon Alexa and Google Assistant. But if you follow the news, you’ll certainly know that Meross is equipping more and more products with Apple HomeKit support.
In terms of features, the Meross thermostat can’t quite keep up with the front-runner tado. But it does include the most important features. The thermostats can be controlled via fixed schedules or adjusted remotely. There is also open-window detection.
You can find our review of the Meross thermostat here (in German).
The Meross thermostat including bridge is available from the following shops:
(As of: 22 October 2020)
AVM FRITZ!DECT 301 – The thermostat for the FRITZ!Box
If you can do without voice control and own a Fritzbox, we recommend the thermostats made by AVM itself! The thermostat connects quickly and easily to the FRITZ!Box via DECT. You can then set the temperatures you want in a schedule. Alternatively, you can also control the thermostats manually using the buttons.
The AVM FRITZ!DECT 301 thermostat is available from the following shops:
(As of: 22 October 2020)
We have also published a detailed review of this thermostat at this link (in German).
Eve Thermo – The “stylish” HomeKit thermostat
Eve Thermo is a smart thermostat that automatically sets the perfect temperature. Eve Systems products all work with Apple’s HomeKit system. A connection to Amazon Alexa or Google Assistant is not possible. You can control the room temperature manually via the integrated touch panel, via the Eve app or by Siri voice command. Thanks to the HomeKit integration, you can set up simple schedules as well as complex automations.
In my opinion, the design of the Eve Systems thermostats is very stylish and looks great. The thermostat can also display the temperature.
The Eve Thermo thermostat is available from the following shops:
(As of: 22 October 2020)
Smart thermostats at a glance
Last updated on 2026-11-13 / affiliate links / images from the Amazon Product Advertising API. Prices shown may have changed since then. All information without guarantee. * = affiliate link: if you order a product through such a link, we receive a commission from the seller. There are no extra costs for you.
Related: Smart radiator thermostats: wireless standards, hub requirements and costs (in German) · SwitchBot radiator thermostat review (in German) · FRITZ!DECT 301 review (in German)
