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Best Smart Thermostats

Smart Thermostat Comparison 2026

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Best Product
HomeMatic 143159A0
HomeMatic 143159A0
Check Price
Amazon
Bestseller
Speedo smart thermostat
Speedo smart thermostat
Check Price
Amazon
HIVE 851811
HIVE 851811
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
HomeMatic 143159A0
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
HomeMatic 143159A0
Bewertung
4847 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
2
Bestseller
Speedo smart thermostat
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
Speedo smart thermostat
Bewertung
2500 Reviews
Zum Anbieter
Amazon
Available at
amazon
£179.99
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
3
HIVE 851811
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
HIVE 851811
Bewertung
263 Reviews
Zum Anbieter
Amazon
Available at
amazon
£120.99
eBay
£136.28
Manufacturer
HIVE
Dimensions
5,9 x 24,4 x 24,4 in
Operating voltage
Display
Type of assembly
IP protection class
Radio technology
Wireless
Temperature range
Weekly program
Timer
Anti-freeze protection
WLAN capable
App
Voice control
Advantages
  • No cable clutter thanks to Wi-Fi
  • Programmable timer
  • App control
  • Various programmable modes
  • Features voice control
4
Danfoss Eco 2
Vergleichsergebnis
Rating
Very Good
05 / 2026
Model
Danfoss Eco 2
Bewertung
708 Reviews
Zum Anbieter
Amazon
Available at
amazon
£74.99
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