Best Comet Dect 2026

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Last Updated - 27.03.2026

Best Choice

01

ET - EUROTRONIC Technology GmbH

Eurotronic Comet Plus Radiator Thermostat

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Optimal adaptation to weather conditions: The Comet Plus has a holiday function, frost and limescale protection function and an automatic summer and winter time adjustment, which can save you on heating costs.
Note: heating valves with which the regulators are compatible without adapters, and that the included black plastic adapters are only suitable for Danfoss valves
Individually programmable: The settings can be made directly on the Comet Plus or even more comfortably using the PROGmatic programming stick (not included) on the PC.
Easy to use: The Comet Plus energy saving controller is easy to install and operate. It is valve-friendly thanks to the Eurotronic valve protection and also fits many other well-known radiator valves.
Box contents: Comet Plus energy-saving controller, instruction manual DE (other languages on request), 3 adapters (Danfoss RA, RAV, RAVL), 2 x AA Mignon batteries, dimensions: 65 x 54 x 85 mm, set of 4, colour: white
AUTOMATIC ROOM VENTILATION Thanks to the window open detection, the radiator thermostat detects directly when a room is being ventilated and closes the valve immediately to save energy.

75,90 €
02

FRITZ!

FRITZ! Smart Thermo 302, Intelligent Radiator Controller, Efficient Heating & High Convenience, Compatible with Standard Radiators, Comfortable Control via App & Display, Easy Setup

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Smart radiator controller for the FRITZ!Box home network, automatic and precise control of the room or living temperature, ideal for creating an individual, efficient heating rhythm
Note: FRITZ!DECT 302 becomes FRITZ!Smart Thermo 302: This is only a product rename. Technically the products are identical, only name and packaging design may vary.
Energy-efficient e-paper display and numerous comfort functions, such as frost protection, limescale protection or boost function, window on detection, button lock, push service, group switching and much more
Easy to install and set up on all standard radiator valves with connection thread, additional adapter available
Control via PC, notebook, FRITZ!Fon, smartphone or tablet - even on the go via the Internet and via app, individual heating profiles can be programmed
Connection with FRITZ!Box at the touch of a button and convenient configuration via the FRITZ!Box user interface, for FRITZ!Box with DECT base, new features available via regular, free updates

59,99 €
03

ET - EUROTRONIC Technology GmbH

Eurotronic Comet Plus Radiator Thermostat

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Optimal adaptation to weather conditions: The heating thermostat has a holiday function, frost and limescale protection function and automatic summer and winter time adjustment, which can efficiently save heating costs.
Individually programmable: settings can be made directly on the Comet Plus or with the PROGmatic programming stick (not included) on the PC. The Comet Plus is a purely electric thermostat (not a smart accessory).
Easy to use: The Comet Plus energy saving controller is easy to install and operate. It is valve-friendly thanks to the Eurotronic valve protection and also fits many other well-known radiator valves.
Box contents: Comet Plus energy-saving controller, instruction manual DE (other languages on request), 3 adapters (Danfoss RA, RAV, RAVL), 2 x AA Mignon batteries, dimensions: 65 x 54 x 85 mm, colour: white
AUTOMATIC ROOM VENTILATION Thanks to the window open detection, the radiator thermostat detects directly when a room is being ventilated and closes the valve immediately to save energy.

16,63 €
Value for Money

04

ET - EUROTRONIC Technology GmbH

Eurotronic Comet Wifi, radiator thermostat, intelligent heating via WLAN, save heating costs, thermostat to regulate room temperature of the road, smart home accessories

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34% Off
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Smart's living: With the wireless thermostat you control your room temperature, etc. in the kitchen, children's, living room and bathroom conveniently integrable via every 2.4 GHz WLAN network - stable and without additional gateway into your SmartHome.
Save costs: The room thermostat for comfortable comfort, thanks to real-time behavior, transforms temperature changes immediately and transmits them while it has a particularly low battery consumption over comparable devices.
Perfect room temperature from the road: The intelligent temperature controller ensures a preheated apartment whenever you come home has a vacation function and accesses your individual heating profiles.
Note: It is important to download the software update in the app for your product.
Intuitive Operation: The heating controller in noble, modern design with LED display is compatible with any WLAN router, fits almost all radiator valves and can be easily controlled by app or via the sensor keys on the device.

26,59 € 39,99 €(34% Off off)
05

Eurotronic

Eurotronic 700083 Comet Plus Radiator Thermostat Electronic 8 to 28 °C

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Valve-friendly thanks to Eurotronic valve protection
Save up to 30% on heating costs
Heating and saving times individually adjustable
Four heating times and four saving times are adjustable per day
8 heating periods programmable

59,97 €
06

ET - EUROTRONIC Technology GmbH

Eurotronic Comet Zero Matter Energy Saving Controller with Wireless Standard Matte Over Thread (Individually Programmable, Alexa, Google, Apple & SmartThings Compatible)

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8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Smart down to the last detail: heating and saving times can be individually adjusted weekly and day-way. The radiator thermostat helps to save up to 30% on heating costs and even detects when a window is open.
Safety in your home: The safety aspect of our smart home accessories is particularly important to us, which is why the energy-saving controller has been communicated locally and certified for optimal safety.
Matter wireless standard compatible energy saving controller: The Comet Zero Matter can be connected to a wide range of smart home systems such as Alexa, Google, Apple or SmartThings.
Especially fast and comfortable operability: a uniform communication standard and the cross-system use make the networking of the radiator thermostat made in Germany particularly easy.
Box contents: Eurotronic Comet Zero Matter, energy-saving controller with wireless standard Matter (energy saving controller, dimensions (W x H x D): 62 x 68 x 82 mm, quick start guide (DE/EN), 3 x adapters (Danfoss RA, RAV, RAVL), 2 x AA Mignon (included)

28,96 €
07

Homematic IP

Homematic IP Smart Home Radiator Thermostat – Basic, Digital, for Heater, Control via App, Alexa, Google Assistant, Easy Installation, Energy Savings, 153412A3

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8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

With the basic radiator thermostat, you can save up to 33% on heating costs– thanks to individual temperature schedules with up to 13 changes per day across three adjustable heating profiles and in combination with open-window detection using a window and door contact.
The setup and control of the thermostat via the free smartphone app and the free cloud service requires connection to the Homematic IP Access Point. This product is no longer compatible with the CCU2 central unit.
Stand-alone operation (push-to-pair) allows direct pairing of up to eight Homematic IP window and door contacts (HmIP-SWDM) and direct control on the device.
Replaces conventional radiator thermostats in just a few simple steps– no intervention in the heating system or draining of water is required.
Ready for immediate use thanks to preset heating profile, which can be manually adjusted if required (individual temperature gradients with up to 13 changes per day).

29,05 €
08

OLYMPIA

Olympia - SMART Heizungsthermostat

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Power source type; hand-operated

22,00 €
09

TP-Link

Kasa Smart Radiator Thermostat KE100 Kit, Digital Thermostat Heating with Hub, Energy Saving, Schedule, Control on the Go via App, Alexa and Google Assistant, Easy Installation and Use

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32% Off
8.2

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Versatile compatibility – Fits most radiator valve threads (M30x1.5) and the six included adapters (RA, RAV, RAVL, CAL, M28 and GIA) ensure more compatibility. - From version 1.20 and above versions, 6 adapters are provided.
Up to 32 radiators – each hub can connect and manage up to 32 radiators.
Time plan and timer: make sure it is as warm as you need it with presets and schedules that fit your life.
Remote control: automatically turns off the heater and activates frost protection when the connected window and door sensor (Tapo T110) is triggered. 1) Open the Kasa Smart App > Search the KH100 > Tap to add the Tapo sensor to the same KH100 as the KE100. 2) Go to the app home page > Search KE100 > Tap to set the temperature correction/detection of the open window.
Please note that the Kasa KE100 kit can be used via the Kasa app and not via the Tapo app. Tapo sensors (Tapo T110, Tapo T310, Tapo T315) can be set up in the Kasa app. Please add the Tapo sensors via the KH100 hub in the Kasa app. The Kasa KE100 kit only supports 2.4GHz WiFi, not 5GHz.
Matter certified – Users can connect the KE100 locally to Apple Home, Amazon Alexa, Google Home, Samsung SmartThings or other Matter-enabled smart home platforms. *Kasa Hub required. *Please update the Kasa app and KH100 firmware to the latest version. 1. Go to the KH100 Hub page in the app, then go to Device Settings > Mount to Matter to find Matter code. 2. Follow the Matter setup process to configure KH100. 3. All other Kasa Hub products, such as TRVs and sensors, are synchronised with third-party platforms.
Frost protection – so that your pipes do not freeze and your home is safe.
Free geofencing: your house heats up automatically when you approach and turns off when you are away.
0.1 °C measurement accuracy – Set the perfect temperature for each room individually and regulate the heating of your home according to zones. No more wasting energy on empty spaces.

29,40 € 42,99 €(32% Off off)
10

Eurotronic

Eurotronic 700226 Comet Z-Wave Radio-Controlled Radiator Thermostat Electronic

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40% Off
8.1

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Z-Wave Plus wireless standard - compatible with many popular smart home gateways
Window open detection for automatic temperature reduction
Manual operation directly on the device possible
Individual heating plans via your smart home control centre
Easy and tool-free installation
Boost function for quick heating
Backlit display for convenient operation

29,99 € 49,99 €(40% Off off)