Before revision: For example, the furnace in the basement of a house is adjusted automatically by the thermostat to be switched on as soon as the temperature at the thermostat falls to 18 °C and the furnace is switched off by the thermostat as soon as the temperature at the thermostat reaches 22 °C.
After revision: For example, the furnace in the basement of a house is adjusted automatically by the thermostat to be switched ON as soon as the temperature at the thermostat falls to 18 °C and the furnace is switched OFF by the thermostat as soon as the temperature at the thermostat reaches 22 °C.