The activation of supplemental heating systems occurs when a thermostat detects a significant difference between the desired temperature and the actual ambient temperature within a structure. For example, if a thermostat is set to 70 degrees Fahrenheit, and the indoor temperature is 65 degrees Fahrenheit, the system may engage auxiliary heat to rapidly increase the temperature. This is often observed in heat pump systems during periods of extremely cold weather.
The engagement of supplemental heat ensures occupant comfort and prevents excessively long run times for the primary heating source, potentially extending its lifespan and preventing premature failure due to overwork. Historically, resistance heating elements have been a common form of auxiliary heat, offering a reliable, albeit less efficient, method of quickly elevating indoor temperatures. Its timely function is vital for consistent thermal regulation within the building environment.