A heat pump is designed to provide both heating and cooling for a building. Its primary function during colder months is to extract heat from the outside air and transfer it indoors. However, situations arise where the supplemental heating system activates. This auxiliary system, often electric resistance heating, provides heat when the heat pump’s efficiency is reduced or it can no longer meet the thermostat’s demand.
The use of supplemental heat is crucial for maintaining a comfortable indoor temperature and preventing the heat pump from overworking. Extended periods of inefficient operation can lead to increased energy consumption and potential damage to the unit. Understanding the factors that trigger supplemental heat is essential for optimizing heat pump performance and minimizing energy costs.