Non-programmable LCD thermostat 230Vac - SIEMENS : RDD100

Siemens RDD100: The battery operated ambience thermostat
This thermostat is ideal for regulating the temperature of a room or a house, due to its different modes to be used all year round:

Comfort mode
Economy mode
Frost protection (used continuously to avoid freezing of the piping)

Siemens RDD100 regulation parameters

P02 Temperature display in °C or °F
P03 Standard temperature display (Ambient or setpoint)
P04 Temperature sensor calibration: -3...3 °C, in 0.5°C steps (-6...6 °F, in 1 °F steps), by default: 0 °C
P05 Comfort Setpoint: 5...35 °C, in 0.5 °C steps (41...95 °F, in 1 °F steps), by default: 20 °C, 68 °F
P06 Lock comfort setpoint
P07 Economy setpoint: 5...35 °C, in 0.5°C steps (41...95 °F, in 1 °F steps), by default: 16°C, 61°F
P08 Lock the economy setpoint
P09 Horn
P10 Display the frost protection symbol
P22 Restore factory settings
P23 Information about the software version

Given the nature of this product, it is recommended to have it installed by a professional.