An auxiliary heating system supplements the primary heating source in a heat pump system. It provides additional warmth when the heat pump’s efficiency decreases, typically during very cold temperatures. A common example is electric resistance heat strips located within the air handler.
The employment of this supplemental heat ensures consistent comfort during periods of extreme cold where the heat pump alone may not be sufficient to maintain the desired indoor temperature. Its presence prevents the occupants from experiencing uncomfortable temperature drops and protects the longevity of the primary heating unit by reducing strain during peak demand.
