When T is equal to Temp Start, output is ON at Fan Speed.
When T is equal to Temp Stop, output is OFF.

Notes:
If Temp Start < Temp Stop, output is in heating mode.
If Temp Start > Temp Stop, output is in cooling mode.

Examples:

Heating mode:
Temp Start = 20°C and Temp Stop = 25°C

Whenever T is inferior or equal to 20°C, output is activated, for example an electric heater, until T rises above 25°C (or equal).

Cooling mode:
Temp Start = 25°C et Temp Stop = 20°C

Whenever T is superior or equal to 25°C, output is activated, for example an extractor fan, until T drops below 20°C (or equal).

Important: if you use a relaybox, Fan Speed must be set to 100%.