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Best Smart Thermostats

Smart Thermostat Comparison 2026

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thermostat thermostat smart thermostat smart thermostat home thermometer home thermometer radiator thermostat radiator thermostat
Best Product
Speedo smart thermostat
Speedo smart thermostat
Check Price
Amazon
Best Price
HomeMatic 143159A0
HomeMatic 143159A0
Check Price
Amazon
Bestseller
Drayton Wiser WT724R9K0902
Drayton Wiser WT724R9K0902
Check Price
Amazon
Danfoss Eco 2
Danfoss Eco 2
Check Price
Amazon
Our Ratings
Model
Customer Ratings
Seller
Available From
Manufacturer
Dimensions
Operating voltage
Display
Type of assembly
IP protection class
Radio technology
Temperature range
Weekly program
Timer
Anti-freeze protection
WLAN capable
App
Voice control
Advantages
1
Best Product
Speedo smart thermostat
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
Speedo smart thermostat
Bewertung
2502 Reviews
Zum Anbieter
Amazon
Available at
amazon
£179.63
eBay
£72.50
Manufacturer
Speedo
Dimensions
Operating voltage
4,5 V
Display
Type of assembly
Glue, Screws
IP protection class
Radio technology
Wireless, Wi-Fi
Temperature range
Weekly program
Timer
Anti-freeze protection
WLAN capable
App
Voice control
Advantages
  • No cable clutter thanks to Wi-Fi
  • Can program settings for different days
  • Has a practical timer
  • Control via app
2
Best Price
HomeMatic 143159A0
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
HomeMatic 143159A0
Bewertung
4826 Reviews
Zum Anbieter
Amazon
Available at
amazon
£49.95
Manufacturer
HomeMatic
Dimensions
8,7 x 33,5 x 33,5 in
Operating voltage
1,5 V
Display
LC display
Type of assembly
Surface-mounted, Glue, Adhesive tape, Screws, Flush mounting
IP protection class
IP14, IP15, IP20, IP44
Radio technology
868 MHz, Wireless, Wi-Fi
Temperature range
0 to 35 °C
Weekly program
Timer
Anti-freeze protection
WLAN capable
App
Voice control
Advantages
  • Can program settings for different days
  • Wireless reception via Wi-Fi
  • App control
  • Equipped with a frost anti-freeze protection
  • With voice control mode
  • Has a practical timer
3
Bestseller
Drayton Wiser WT724R9K0902
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
Drayton Wiser WT724R9K0902
Bewertung
361 Reviews
Zum Anbieter
Amazon
Available at
amazon
£129.95
eBay
£84.66
cityplumbing.co.uk
£89.63
onbuy.com
£101.24
Manufacturer
Drayton Wiser
Dimensions
2,8 x 3,7 x 5,9 in
Operating voltage
230 V
Display
LC display
Type of assembly
IP protection class
Radio technology
Wi-Fi
Temperature range
Weekly program
Timer
Anti-freeze protection
WLAN capable
App
Voice control
Advantages
  • No cable clutter thanks to Wi-Fi
  • Programmable timer
  • Can program settings for different days
4
Danfoss Eco 2
Vergleichsergebnis
Rating
Very Good
05 / 2026
Model
Danfoss Eco 2
Bewertung
708 Reviews
Zum Anbieter
Amazon
Available at
amazon
£80.99
eBay
Check Price
Manufacturer
Danfoss
Dimensions
1,2 x 1,2 x 1,6 in
Operating voltage
1,5 V
Display
LC display
Type of assembly
Screws
IP protection class
IP20
Radio technology
Bluetooth, Wireless
Temperature range
4 to + 28 °C
Weekly program
Timer
Anti-freeze protection
WLAN capable
App
Voice control
Advantages
  • Timer included
  • With app
  • With anti-freeze protection
  • Can program settings for different days
  • Wireless reception via Wi-Fi