What does the temperature differential in thermostats refer to?

The temperature differential in thermostats primarily refers to the difference between the cut-in and cut-out points. This differential represents the range of temperatures that a thermostat operates within to control a heating or cooling system effectively.

When a system reaches the cut-in point, the thermostat activates the heating or cooling equipment to reach the desired setpoint. When the temperature reaches the cut-out point, the thermostat deactivates the system to prevent it from overheating or overcooling. The differential ensures that the system does not frequently switch on and off, which could lead to rapid wear and inefficiency.

This understanding is crucial in HVAC design and operation, as it affects the comfort level in a space, energy consumption, and the longevity of the equipment.