Best Fritz 301 2026

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Last Updated - 27.03.2026

Best Choice

01

tado

tado Smart Radiator Thermostat X - Starter Kit with Bridge X, Heating Control via App and Smart Speaker (Alexa, Siri, Google Assistant), Energy Saving, DIY Installation

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24% Off
9.8

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

Saves energy and costs: with the intelligent heating thermostat X starter kit from tado, the expert in smart heating, users save an average of 22 percent energy – the more rooms you control, the more you save
SAVE MAXIMUM WITH AI: With "AI-Assist" you save up to 55 percent more energy thanks to automations such as geofencing, window open detection, holiday mode, insights into energy costs, solutions to heating problems and much more. (only EUR 3.99 per month, EUR 29.99 per year)
Intuitive operation: via touch display, the thermostat can be installed and operated smoothly - the removable battery is charged in about 2 hours with any standard USB-C cable (only 1 x per season required)
Important to know: Tado X products are not compatible with Tado V3+ or older
Future-proof technologies: Thanks to Matter, different smart home devices can communicate with each other, at the same time thread ensures a stable network – this requires the Bridge X (included) or another Thread Border Router
For your smart home: In addition to the direct setting on the thermostat, you can also easily control the individual temperature per room via app or via smart speaker with Amazon Alexa, Google Assistant or Apple Siri
Easy DIY installation, also offline: thanks to the included adapters, the thermostat fits almost all radiator valves, whereby the robust metal nut ensures a stable hold on the radiator without risk of leakage (exclusive with extra template)
Control via app: the thermostat offers numerous features for your heating such as intelligent schedules, advanced geofencing, window open detection without additional window contacts and much more

129,99 € 171,99 €(24% Off off)
02

ET - EUROTRONIC Technology GmbH

Eurotronic Comet Plus Radiator Thermostat

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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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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 €
Value for Money

03

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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18% Off
9.4

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
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

45,99 € 55,90 €(18% Off off)
04

FRITZ!

AVM FRITZ! DECT 200 - Intelligent socket for the home network, German-language version

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9.3

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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Switch individually: once, daily, weekly, rhythmically, randomly, depending on the time of sunrise and sunset or via Google Calendar
Measures energy consumption and shows details on performance, consumption, electricity costs and the carbon footprint and sends them on request by Push-Mail, scope of delivery: FRITZ! DECT 200, German installation instructions
Intelligent socket for Smart Home, switches the power supply of connected devices automatically or manually (up to 2,300 watts)
Controllable via FRITZ! Fon via DECT, via PC, smartphone or tablet via the user interface of the FRITZ! Box or MyFRITZ! App
Compatible with the following FRITZ! Boxes: FRITZ! Box 7490, FRITZ! Box 7390, FRITZ! Box 7360, FRITZ! Box 7320 (1 & 1), FRITZ! Box 7270 ( From version v2), FRITZ! Box 7272, FRITZ! Box 7240 (1 & 1), FRITZ! Box 6842 LTE, FRITZ! Box 6840 LTE, FRITZ! Box 6810 LTE, FRITZ! Box 6360 Cable, FRITZ! Box 6490 Cable

42,42 €
05

ET - EUROTRONIC Technology GmbH

Eurotronic Comet Plus Radiator Thermostat

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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

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.

16,95 €
06

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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8.8

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

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).

29,95 €
07

TP-Link

TP-Link Kasa KE100 Smart Radiator Thermostat, Accessory Product, Energy Saving, Schedule, Control on the Go via App, Alexa and Google Assistant, Hub Required, White, 56.6 x 56.5 x 83.93 mm

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15% Off
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

Versatile compatibility – Fits most radiator valve threads (M30x1.5) and the six included adapters (RA, RAV, RAVL, CAL, M28 and GIA) ensure more compatibility. -
Ultra-long standby time – Using the energy-saving wireless technologies that promise a longer battery life.
Smart anywhere and any time – Control the temperature of your home with the Kasa Smart App from anywhere and any time. Set schedules to automate your heating that matches your daily routines. Open window detection – KE100 can now work with Tapo T110. Please add Tapo T110 via the KH100 hub in the Kasa app.
Room-by-room comfort – Set the perfect temperature in each room individually. Save your preferred scenario for further use.
Please note that the Kasa KE100 can only be controlled 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.
One for all – Each hub can connect and control up to 32 radiators, with the Kasa app you can combine and control all radiators. All rooms under control.
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.
Easy installation – Simply replace your old radiator valve with Kasa and follow the step-by-step instructions (English language not guaranteed) in the app for installation. You can do all this yourself without difficulty.
Child lock – Prevent children from accidentally operating your radiator.
Caution. Please note that this thermostat must work together with a hub, you must have KE100 KIT in advance. KE100 cannot work with the Tapo H100 and Tapo H200 hub, but only with the hub in the KE100 kit.

20,95 € 24,65 €(15% Off off)
08

FRITZ!

AVM Fritz!DECT Repeater 100 (Increases DECT Range)

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8.4

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 FRITZ!Box as a base station DECT repeating also for HD telephony, Internet radio, podcasts and RSS as well as eavesdrop-proof calls
Quickly and easily increases the DECT range, ideal for all FRITZ!Box models with integrated DECT base
Multiple calls at the same time over long distances, range can be extended in any direction by using additional repeaters
Compatible with DECT base stations from other manufacturers (GAP standard) with activated repeater function
Box contents: FRITZ!DECT repeater 100, installation instructions (English language not guaranteed)

70,99 €
09

shuokang

Radiator Thermostat Protective Cover with Lock Upgrade, Thermostat Sensors, Universal Intelligent Radiator Controller Protection Box, More Space, Additional Clips, for AVM FRITZ, Honeywell Home, Danfoss

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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

Widely used: the double-opening hexagonal locking mechanism securely locks a variety of heating thermostats. The thermostat lock cover with key provides protection for radiator valves, smart radiator regulators installed in dining rooms, offices, living rooms and bedrooms, classrooms and industrial environments!
Universal thermostat protection box: this radiator thermostat protection box is suitable for most cylindrically shaped thermostats, fits heating thermostats with a diameter of 2.3 inches, length 4.5 inches or smaller, and the water valve below 1.18 inches is also suitable, we recommend you measure the size before purchasing.
Thermostat protection box with key: the thermostat protective cover with key prevents children and guests from tampering, damaging and unauthorised changing the thermostat settings, and also prevents pets such as dogs and cats from touching the thermostat. The outer corners of the protective box are polished and designed so that children and pets cannot be accidentally injured.
Friendly design: the waterproof, dustproof and heat-dissipating protective box of the heater controller has a hexagonal design that is robust and durable. It is not only UV-resistant, but also has anti-yellowing properties. And it comes with a protective plug that can be removed when you need to dissipate heat from the thermostat, and can be installed when you need to protect children and pets.
Easy installation: it can be installed without tools, which makes it easier to use. Just open the thermostat sealing box, put the sealing box over the thermostat, then install the dust plug in the small opening, padlock it and you're done.

17,99 €
10

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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11% Off
8.0

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 € 33,00 €(11% Off off)