Final answer:
The purpose of staging t-stats is to improve energy efficiency by reducing energy loss during transmission.
Step-by-step explanation:
The purpose of staging t-stats is to improve energy efficiency by reducing energy loss during transmission. By using multiple stages of temperature control, it is possible to optimize the heating or cooling process and minimize the energy consumed. This is achieved by adjusting the temperature setpoints for different zones based on occupancy, time of day, or other factors.