Best Fritz Thermostat 2026

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Last Updated - 27.03.2026

Best Choice

01

FRITZ!

FRITZ! Smart Energy 250 | Intelligent Current Sensor | Power Consumption Meter for Optimising Energy Costs | Evaluation via App OS | Easy Setup | German Version

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17% Off
9.6

Exceptional

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Main highlights

Intelligent power sensor for the FRITZ! home network to save and optimise energy
Ideal for reading, monitoring and evaluating the consumption data of a digital electricity meter
FRITZ!Smart Energy 250 is compatible with most digital electricity meters installed in Germany. Further information: fritz.com/service/current sensor
Easy to attach to the digital electricity meter by magnet, powered by batteries or USB port
Convenient monitoring in the FRITZ!App Smart Home, FRITZ!OS or MyFRITZ!Net of all essential data and savings potentials
Box contents: FRITZ!Smart Energy 250, 2x AA batteries (in device), installation instructions (English language not guaranteed)

73,90 € 89,00 €(17% Off off)
Value for Money

02

FRITZ!

AVM FRITZ!Repeater 1200 AX (Wi-Fi 6 Repeater with two radio units: 5 GHz band (up to 2,400 Mbps), 2.4 GHz band (up to 600 Mbps), German version)

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31% Off
9.4

Excellent

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Main highlights

WiFi mesh: Multiple Wi-Fi access points are combined into a single smart Wi-Fi network with optimal performance, easy and secure installation at the touch of a button (WPS)
Ultra-fast Wi-Fi 6 throughout the home network as well as intelligent automatic band selection (cross band repeating): 5GHz band (up to 2400Mbps) and 2.4GHz band (up to 600Mbps)
Supports 160 MHz wide channels for WLAN with up to 3,000 Mbps (WLAN AX) and Gigabit LAN connection for building a LAN bridge or for network devices without WLAN function
Innovative Wi-Fi 6 designed for a demanding home network with a variety of WLAN devices for simultaneous use
Box contents: AVM FRITZ!Repeater 1200 AX, installation instructions (English language not guaranteed)
1 device includes that this device is equipped with two radio units, one for 5 GHz and one for 2.4 GHz

65,55 € 95,00 €(31% Off off)
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
9.3

Excellent

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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!

FRITZ! Smart Control 440 Portable Configurable Button for Smart Home Operation, White

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9.1

Excellent

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Note: FRITZ!DECT 440 becomes FRITZ!Smart Control 440: This is only a product rename. Technically, the products are identical, name and packaging design may vary.
Handy design, portable or stationary use, easy wall mounting or magnetic wall mount
Convenient remote control for the smart home network using four configurable buttons, use in conjunction with FRITZ! sockets and FRITZ! radiator controller
Control up to twelve devices or groups of devices conveniently via the high-resolution e-paper display
Can be used with any FRITZ!Box with DECT base via DECT ULE radio

62,99 €
05

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
9.0

Excellent

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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)
06

FRITZ!

FRITZ! Smart Control 350 (Magnetic Door/Window Contact for Smart Home, Energy Efficient, DECT-ULE Sensor, Compatible with FRITZ!Box, Detects Open Doors/Windows, German Version)

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8.8

Very Good

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Main highlights

Smart door and window contact that immediately detects as soon as doors or windows are opened, closed or tilted and triggers scenarios to save on heating and energy costs
Simply control and control via the FRITZ!App Smart Home, the FRITZ!Fon or the FRITZ!Box user interface
Quick installation thanks to the included adhesive strips, can be attached to or on the window or door frame as well as integration into the home network within a few minutes at the touch of a button
Perfect interaction with intelligent radiator controllers, such as the FRITZ!Smart Control 302, as well as the FRITZ!Box via the DECT-ULE sensor
Box contents: FRITZ!Smart Control 350 (consisting of sensor and magnet), quick start guide, 2 x AAA batteries, adhesive strip, reset needle

39,99 €
07

Bosch

Bosch Smart Home Radiator Thermostat II [+M], Smart Thermostat, Flexible Use in Bosch Smart Home System or in Matte, Anthracite Systems

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25% Off
8.6

Very Good

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Main highlights

Smart temperature control: heating thermostat ensures room-accurate and individually adjustable feel-good temperature, whose values are displayed in the app
Save energy: smart thermostat heats only according to individual needs and can be configured via time programs, heating schedules, scenarios and clever services to avoid unnecessary heating
Maximum added value in the system: a Bosch Smart Home controller is required for integration into the Bosch Smart Home system. The radiator thermostat II is not compatible with Bosch EasyControl
Flexible use: can be integrated with the Bosch Smart Home controller in the Bosch Smart Home system or without a controller in matte systems. Use can be selected during installation
Flexible control: operation of the heater directly on the device, via a room thermostat, remotely in the app, fully automated or possible by voice
Comfortable indoor climate: radiator thermostats of a room are combined into a room temperature in the Bosch Smart Home system and can be precisely controlled via the room thermostat

49,99 € 66,73 €(25% Off off)
08

ET - EUROTRONIC Technology GmbH

Eurotronic Comet Plus Radiator Thermostat

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8.3

Good

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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 €
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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11% 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 € 33,00 €(11% Off off)
10

FRITZ!

Avm Fritz!Dect 210 Intelligent Socket for Smart Home with Splash Protection IP 44 for Outdoor Use

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8.1

Good

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Main highlights

Splash-proof (IP 44) and extended temperature range for outdoor use; energy consumption measurement.
Select on/off mode: single, daily, weekday, rhythmic, random, depending on the time of sunset and sunset or by Google calendar.
Intelligent smart home socket; automatic or manual on / off for connected devices (up to 3,450 W).
Controllable via FRITZ!Fon via DECT, via PC, smartphone or tablet via the user interface of the FRITZ!Box or MyFRITZ!app.
Box contents: FRITZ!DECT 210, German installation instructions, wireless range: up to 300 metres outdoors, and up to 40 metres in buildings.

39,00 €