In a unit controlled by a thermostat, the differential is the difference between what two temperatures?

The differential in a unit controlled by a thermostat refers specifically to the switch on and switch off temperatures. This concept is crucial in the operation of HVAC systems, as it determines the temperature range that triggers the thermostat to activate or deactivate the heating or cooling functions of the system.

When the temperature in a space falls below the set switch on temperature, the thermostat signals the unit to begin heating. Conversely, when the temperature rises above the switch off temperature, it tells the unit to stop heating. This differential helps to maintain a stable indoor climate while preventing the unit from constantly cycling on and off, which could lead to increased wear and energy consumption.

Understanding this differential is essential for effectively managing HVAC systems, ensuring they operate efficiently while providing comfort. The other options listed, while they involve temperature, do not pertain to the specific operational mechanism of a thermostat’s function related to cycling of heating and cooling systems.