Comparison numbers

25 Products researched
7 Research hours
320 Readers
60,026 Customer ratings

Best Thermostats

Thermostat Comparison 2026

smart thermostat
smart thermostat
 home thermometer
home thermometer
 thermostat
thermostat
 radiator thermostat
radiator thermostat
Sort & Filter
Best Product
KETOTEK thermostat
KETOTEK thermostat
Amazon
Bestseller
ESI Esrtp4+
ESI Esrtp4+
Amazon
Speedo thermostat
Speedo thermostat
Amazon
Honeywell RTH221B
Honeywell RTH221B
Amazon
Best Price
COMPUTHERM thermostat
COMPUTHERM thermostat
Amazon
Heatmiser thermostat
Heatmiser thermostat
Amazon
EBERLE RTR - E 6121
EBERLE RTR - E 6121
Amazon
RatingHow we compare
Customer rating (from Amazon)
Available at
Manufacturer
Dimensions
Operating voltage
Weekly program
Anti-freeze protection
Advantages
Shipping (Amazon)
Best Product
Best Product
AmazonKETOTEK thermostat
Rating
Excellent01/2025

1

KETOTEK thermostat
Customer rating
Amazon2,222 reviews
Check Price
Available at
37,99 £
see vendordays
see vendordays
Manufacturer
Dimensions
1,6 x 3,4 x 3,4 in
Operating voltage
240 V
Weekly program
Anti-freeze protection
Advantages
  • Has an anti-freeze protection
Shipping (Amazon)
see vendor
Check Price
Bestseller
Bestseller
AmazonESI Esrtp4+
Rating
Excellent05/2025

2

ESI Esrtp4+
Customer rating
Amazon787 reviews
Check Price
Available at
67,00 £
see vendordays
45,76 £
see vendordays2.942.94£
Manufacturer
ESI
Dimensions
2,5 x 5,8 x 9,2 in
Operating voltage
Weekly program
Anti-freeze protection
Advantages
Shipping (Amazon)
see vendor
Check Price
AmazonSpeedo thermostat
Rating
Excellent05/2025

3

Speedo thermostat
Customer rating
Amazon2,441 reviews
Check Price
Available at
165,07 £
see vendordays
see vendordays
Manufacturer
Speedo
Dimensions
2 x 3,9 x 5,9 in
Operating voltage
4,5 V
Weekly program
Anti-freeze protection
Advantages
  • Can program settings for different days
Shipping (Amazon)
see vendor
Check Price
AmazonHoneywell RTH221B
Rating
Excellent05/2025

4

Honeywell RTH221B
Customer rating
Amazon7,099 reviews
Check Price
Available at
36,35 £
see vendordays
see vendordays
Manufacturer
Honeywell
Dimensions
Operating voltage
240 V
Weekly program
Anti-freeze protection
Advantages
Shipping (Amazon)
see vendor
Check Price
Best Price
Best Price
AmazonCOMPUTHERM thermostat
Rating
Excellent01/2025

5

COMPUTHERM thermostat
Customer rating
Amazon660 reviews
Check Price
Available at
29,50 £
see vendordays
28,50 £
see vendordays00£
Manufacturer
Dimensions
1,6 x 3,9 x 5,5 in
Operating voltage
24 V
Weekly program
Anti-freeze protection
Advantages
Shipping (Amazon)
see vendor
Check Price
AmazonHeatmiser thermostat
Rating
Very Good01/2025

6

Heatmiser thermostat
Customer rating
Amazon71 reviews
Check Price
Available at
51,18 £
see vendordays
see vendordays
Manufacturer
Dimensions
Operating voltage
Weekly program
Anti-freeze protection
Advantages
Shipping (Amazon)
see vendor
Check Price
AmazonEBERLE RTR - E 6121
Rating
Very Good01/2025

7

EBERLE RTR - E 6121
Customer rating
Amazon531 reviews
Check Price
Available at
52,99 £
see vendordays
65,69 £
see vendordays00£
39,91 £
3 daysdays00£
Manufacturer
EBERLE
Dimensions
1 x 3 x 3 in
Operating voltage
230 V
Weekly program
Anti-freeze protection
Advantages
  • Has an anti-freeze protection
Shipping (Amazon)
3 days
Check Price

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